Document:

exv10w2

 

Exhibit 10.2

	 	 	 	 	 
	

	 	 	 	
LifeScan, Inc. 1000
Gibraltar Drive, Milpitas, CA 95035-6312

Tel: 408-263-9789 Fax: 408-946-6070 www.LifeScan.com

June 1,
2007

Andrew
Denver

Chairman

Universal Biosensors Inc

27, Woodville Ave

Wahroonga NSW 2076
Australia

Dear Andrew,

I am writing to you today to propose amending our current Development and Research
Agreement.

This amendment will be effective as of the date of this letter and amends the
Development and Research Agreement (“Agreement”) entered into the 1st
day of April, 2002 and amended on March 31,2004 and
December 21, 2004 and December 7, 2005 by
and between Universal Biosensors, Inc., a Delaware corporation having a principal place
of business at 2711 Centerville Road, Suite 400, Wilmington, Delaware 19808
(“Universal Biosensors”) and LifeScan Inc., a California corporation having its principal
place of business at 1000 Gibraltar Drive, Milpitas, California 95035 (“Lifescan”).
LifeScan and Universal Biosensors are sometimes referred to herein individually as a
“Party” and collectively as the “Parties.”

In consideration for the covenants and undertakings set forth herein and in the
Agreement, the Parties hereby agree:-

Article 2.2 is hereby amended to add the following sentence at the end thereof:

“The structure and personnel of the Steering Committee may be changed at any
time upon mutual consent of the parties.”

Article 4.1 is deleted in its entirety and replaced by the following:

     
4.1 In consideration for the rights, licenses, and options granted herein to
LIFESCAN, LIFESCAN shall make payments to UNIVERSAL BIONSENSORS in
accordance with the provisions of Exhibit E, which is attached hereto.

 

 

Article 9.2 a) is amended by inserting new contact details for Universal Biosensors’ party
to receive a copy of any notice served by LIFESCAN as follows:

Chief Executive Officer

103 Ricketts Road

Mt. Waverly VIC 3149

Australia

Facsimile: + 61 3 9543 6490

(or such other address and contact details as may be notified to Lifescan from

time to time by written notice.)

The Parties agree that all other provisions in the Agreement remain effective.

In witness whereof, LifeScan and Universal Biosensors have caused these present to be
signed.

AGREED AND ACCEPTED TO:

	 	 	 	 	 	 	 	 	 	 	 
	UNIVERSAL BIOSENSORS INC	 	 	 	LIFESCAN, INC.	 	 
	 
	 	 	 	 	 	 	 	 	 	 
	By:

	 	/s/ Andrew Denver
	 	 	 	By:
	 	/s/ John E. Klopp	 	 
	 

	 	 
	 	 	 	 	 	 	 	 
	Name:

	 	Andrew Denver
	 	 	 	Name:
	 	John E. Klopp	 	 
	Title:

	 	Chairman
	 	 	 	Title:
	 	WWVP, Bus. Dev.	 	 
	Date:

	 	June 1, 2007
	 	 	 	Date:
	 	June 1, 2007	 	 

 

 

EXHIBIT
E

In consideration for the rights, licenses and options granted herein,
LIFESCAN, from December 1, 2006,
shall make payments to UNIVERSAL BIOSENSORS of two hundred fifty thousand DOLLARS US (US
$250,000.00) within thirty (30) days of the beginning of each calendar quarter during the Term. Any
payments due hereunder shall be payable to UNIVERSAL BIOSENSORS in United States Dollars by
wire transfer.exv4w07

 

Exhibit 4.07

 

Ciena Corporation,

as Issuer,

and

The Bank of New York,

as Trustee

 

INDENTURE

Dated as of June 11, 2007

 

0.875% Convertible Senior Notes due 2017

 

 

 

CROSS-REFERENCE TABLE

	 	 	 	 	 
	TIA	 	Indenture
	Section	 	Section
	310(a)(1)
	 	 	8.10	 
	(a)(2)
	 	 	8.10	 
	(a)(3)
	 	 	N.A.	 
	(a)(4)
	 	 	N.A.	 
	(a)(5)
	 	 	N.A.	 
	(b)
	 	 	8.3; 8.8; 11.10	 
	(c)
	 	 	N.A.	 
	311(a)
	 	 	8.11	 
	(b)
	 	 	8.11	 
	(c)
	 	 	N.A.	 
	312(a)
	 	 	2.5	 
	(b)
	 	 	11.3	 
	(c)
	 	 	11.3	 
	313(a)
	 	 	8.6	 
	(b)(1)
	 	 	N.A.	 
	(b)(2)
	 	 	8.6	 
	(c)
	 	 	8.6; 11.2	 
	(d)
	 	 	8.6	 
	314(a)
	 	 	3.3	 
	(b)
	 	 	N.A.	 
	(c)(1)
	 	 	11.4	 
	(c)(2)
	 	 	11.4	 
	(c)(3)
	 	 	N.A.	 
	(d)
	 	 	N.A.	 
	(e)
	 	 	11.5	 
	(f)
	 	 	N.A.	 
	315(a)
	 	 	8.1(b), 8.1	(g)
	(b)
	 	 	8.5; 11.2	 
	(c)
	 	 	8.1	(a)
	(d)
	 	 	8.1	(c)
	(e)
	 	 	7.11	 
	316(a)(last sentence)
	 	 	11.6	 
	(a)(1)(A)
	 	 	7.5	 
	(a)(1)(B)
	 	 	7.4	 
	(a)(2)
	 	 	N.A.	 
	(b)
	 	 	7.7	 
	(c)
	 	 	10.7	 
	317(a)(1)
	 	 	7.8	 
	(a)(2)
	 	 	7.9	 
	(b)
	 	 	2.4	 
	318(a)
	 	 	8.1(g); 11.1	 

 i 

 

 

N.A. means not applicable

Note: This Cross-Reference table shall not, for any purpose, be deemed to be part of this
Indenture.

ii

 

TABLE OF CONTENTS

	 	 	 	 	 
	 	 	Page
	ARTICLE I DEFINITIONS AND INCORPORATION BY REFERENCE
	 	 	1	 
	 
	 	 	 	 
	SECTION 1.1. Definitions.
	 	 	1	 
	SECTION 1.2. Incorporation by Reference of Trust Indenture Act.
	 	 	10	 
	SECTION 1.3. Rules of Construction.
	 	 	11	 
	 
	 	 	 	 
	ARTICLE II THE NOTES
	 	 	11	 
	 
	 	 	 	 
	SECTION 2.1. Form, Dating and Terms.
	 	 	11	 
	SECTION 2.2. Execution and Authentication.
	 	 	14	 
	SECTION 2.3. Registrar, Conversion Agent and Paying Agent.
	 	 	15	 
	SECTION 2.4. Paying Agent To Hold Money and Securities in Trust.
	 	 	16	 
	SECTION 2.5. Holder Lists.
	 	 	16	 
	SECTION 2.6. Transfer and Exchange.
	 	 	16	 
	SECTION 2.7. Mutilated, Destroyed, Lost or Stolen Notes.
	 	 	17	 
	SECTION 2.8. Cancellation.
	 	 	18	 
	SECTION 2.9. Payment of Interest; Defaulted Interest.
	 	 	18	 
	SECTION 2.10. Computation of Interest.
	 	 	19	 
	SECTION 2.11. CUSIP Numbers.
	 	 	20	 
	SECTION 2.12. Calculations in Respect of the Notes.
	 	 	20	 
	 
	 	 	 	 
	ARTICLE III COVENANTS
	 	 	20	 
	 
	 	 	 	 
	SECTION 3.1. Payment of Notes.
	 	 	20	 
	SECTION 3.2. Maintenance of Office or Agency.
	 	 	20	 
	SECTION 3.3. Compliance Certificate.
	 	 	21	 
	SECTION 3.4. Reservation of Common Stock.
	 	 	21	 
	SECTION 3.5. Issuance of Shares.
	 	 	21	 
	SECTION 3.6. Transfer Taxes.
	 	 	21	 
	SECTION 3.7. Offer To Repurchase upon a Fundamental Change.
	 	 	22	 
	 
	 	 	 	 
	ARTICLE IV SUCCESSORS
	 	 	26	 
	 
	 	 	 	 
	SECTION 4.1. Merger, Consolidation, or Sale of Assets.
	 	 	26	 
	SECTION 4.2. Successor Corporation Substituted.
	 	 	26	 
	 
	 	 	 	 
	ARTICLE V REDEMPTION OF NOTES
	 	 	27	 
	 
	 	 	 	 
	SECTION 5.1. No Optional Redemption.
	 	 	27	 
	 
	 	 	 	 
	ARTICLE VI CONVERSION OF NOTES
	 	 	27	 
	 
	 	 	 	 
	SECTION 6.1. Conversion Right and Conversion Rate.
	 	 	27	 

iii

 

	 	 	 	 	 
	 	 	Page
	SECTION 6.2. Conversion Consideration.
	 	 	28	 
	SECTION 6.3. Exercise of Conversion Right.
	 	 	28	 
	SECTION 6.4. Fractions of Shares.
	 	 	30	 
	SECTION 6.5. Adjustment of Conversion Rate.
	 	 	30	 
	SECTION 6.6. Notice of Adjustments of Conversion Rate.
	 	 	37	 
	SECTION 6.7. Cancellation of Converted Notes.
	 	 	38	 
	SECTION 6.8. Provision in Case of Consolidation, Merger or Sale of Assets.
	 	 	38	 
	SECTION 6.9. Rights Issued in Respect of Common Stock.
	 	 	39	 
	SECTION 6.10. Responsibility of Trustee and Conversion Agent for Conversion Provisions.
	 	 	39	 
	 
	 	 	 	 
	ARTICLE VII DEFAULTS AND REMEDIES
	 	 	40	 
	 
	 	 	 	 
	SECTION 7.1. Events of Default.
	 	 	40	 
	SECTION 7.2. Acceleration.
	 	 	42	 
	SECTION 7.3. Other Remedies.
	 	 	42	 
	SECTION 7.4. Waiver of Past Defaults.
	 	 	43	 
	SECTION 7.5. Control by Majority.
	 	 	43	 
	SECTION 7.6. Limitation on Suits.
	 	 	43	 
	SECTION 7.7. Rights of Holders of Notes To Receive Payment or Effect Conversion.
	 	 	44	 
	SECTION 7.8. Collection Suit by Trustee.
	 	 	44	 
	SECTION 7.9. Trustee May File Proofs of Claim.
	 	 	44	 
	SECTION 7.10. Priorities.
	 	 	45	 
	SECTION 7.11. Undertaking for Costs.
	 	 	45	 
	 
	 	 	 	 
	ARTICLE VIII TRUSTEE
	 	 	45	 
	 
	 	 	 	 
	SECTION 8.1. Duties of Trustee.
	 	 	45	 
	SECTION 8.2. Rights of Trustee.
	 	 	47	 
	SECTION 8.3. Individual Rights of Trustee.
	 	 	48	 
	SECTION 8.4. Trustee’s Disclaimer.
	 	 	48	 
	SECTION 8.5. Notice of Defaults.
	 	 	48	 
	SECTION 8.6. Reports by Trustee to Holders.
	 	 	49	 
	SECTION 8.7. Compensation and Indemnity.
	 	 	49	 
	SECTION 8.8. Replacement of Trustee.
	 	 	50	 
	SECTION 8.9. Successor Trustee by Merger.
	 	 	50	 
	SECTION 8.10. Eligibility; Disqualification.
	 	 	51	 
	SECTION 8.11. Preferential Collection of Claims Against Company.
	 	 	51	 
	 
	 	 	 	 
	ARTICLE IX SATISFACTION AND DISCHARGE OF INDENTURE; UNCLAIMED MONEYS
	 	 	51	 
	 
	 	 	 	 
	SECTION 9.1. Satisfaction and Discharge of Indenture.
	 	 	51	 
	SECTION 9.2. Application by Trustee of Funds Deposited for Payment of Notes.
	 	 	52	 
	SECTION 9.3. Repayment of Moneys Held by Paying Agent.
	 	 	52	 

iv

 

	 	 	 	 	 
	 	 	Page
	SECTION 9.4. Return of Moneys Held by Trustee and Paying Agent Unclaimed for Two Years.
	 	 	52	 
	SECTION 9.5. Indemnity for U.S. Government Obligations.
	 	 	53	 
	 
	 	 	 	 
	ARTICLE X SUPPLEMENTAL INDENTURES AND AMENDMENTS
	 	 	53	 
	 
	 	 	 	 
	SECTION 10.1. Without Consent of Holders.
	 	 	53	 
	SECTION 10.2. With Consent of Holders.
	 	 	54	 
	SECTION 10.3. Execution of Supplemental Indentures, Agreements and Waivers.
	 	 	55	 
	SECTION 10.4. Effect of Supplemental Indentures.
	 	 	55	 
	SECTION 10.5. Compliance with Trust Indenture Act.
	 	 	55	 
	SECTION 10.6. Reference in Notes to Supplemental Indentures.
	 	 	55	 
	SECTION 10.7. Revocation and Effect of Consents and Waivers.
	 	 	55	 
	SECTION 10.8. Notation on or Exchange of Notes.
	 	 	56	 
	 
	 	 	 	 
	ARTICLE XI MISCELLANEOUS
	 	 	56	 
	 
	 	 	 	 
	SECTION 11.1. Trust Indenture Act Controls.
	 	 	56	 
	SECTION 11.2. Notices.
	 	 	56	 
	SECTION 11.3. Communication by Holders with Other Holders.
	 	 	57	 
	SECTION 11.4. Certificate and Opinion as to Conditions Precedent.
	 	 	57	 
	SECTION 11.5. Statements Required in Certificate or Opinion.
	 	 	57	 
	SECTION 11.6. When Notes Disregarded.
	 	 	57	 
	SECTION 11.7. Rules by Trustee, Paying Agent and Registrar.
	 	 	58	 
	SECTION 11.8. Governing Law.
	 	 	58	 
	SECTION 11.9. No Recourse Against Others.
	 	 	58	 
	SECTION 11.10. Successors.
	 	 	58	 
	SECTION 11.11. Multiple Originals.
	 	 	58	 
	SECTION 11.12. Force Majeure.
	 	 	58	 
	SECTION 11.13.
	 	 	58	 
	SECTION 11.14. Waiver of Jury Trial.
	 	 	58	 

EXHIBITS

			
	EXHIBIT A	 	Form of Note

			
	EXHIBIT B	 	Form of Conversion Notice

v

 

INDENTURE, dated as of June 11, 2007, between Ciena Corporation, a corporation incorporated under
the laws of the State of Delaware (the “Company”), as issuer and The Bank of New York, a New York
banking corporation (the “Trustee”), as trustee.

RECITALS OF THE COMPANY

     The Company has duly authorized the execution and delivery of this Indenture to provide for
the issuance of an unlimited principal amount of the Company’s 0.875% Convertible Senior Notes due
2017, convertible into common stock, par value $0.01 per share, of the Company (the “Notes”), and
has qualified this Indenture under the TIA.

     All things necessary have been done to make the Notes, when executed by the Company and
authenticated and delivered hereunder and duly issued by the Company, the valid obligations of the
Company and to make this Indenture a valid agreement of each of the Company and the Trustee in
accordance with the terms hereof.

     Each party agrees as follows for the benefit of the other parties and for the equal and
ratable benefit of the Holders of the Notes:

ARTICLE I

DEFINITIONS AND INCORPORATION BY REFERENCE

     SECTION 1.1. Definitions.

     “Additional Notes” means additional Notes (other than the Initial Notes), if any, issued under
this Indenture in accordance with Section 2.2 hereof, as part of the same series as the Initial
Notes.

     “Additional Shares” means additional shares of Common Stock by which the Conversion Rate shall
be increased for Notes surrendered for conversion pursuant to an adjustment of the Conversion Rate
upon the occurrence of a Fundamental Change. The number of Additional Shares shall be determined
based on the Effective Date of the Fundamental Change and the Stock Price in such Fundamental
Change transaction, all in accordance with Section 6.5(e).

     “Affiliate” means, with respect to any specified Person, any other Person directly or
indirectly controlling or controlled by or under direct or indirect common control with such
specified Person. For the purposes of this definition, “control” when used with respect to any
specified Person means the power to direct the management and policies of such Person, directly or
indirectly, whether through the ownership of voting securities, by contract or otherwise; and the
terms “controlling” and “controlled” have meanings correlative to the foregoing. No individual
shall be deemed to be controlled by or under common control with any specified Person solely by
virtue of his or her status as an employee or officer of such specified Person or of any other
Person controlled by or under common control with such specified Person.

     “Agent” means any Registrar, co-registrar, Paying Agent, additional paying agent or Conversion
Agent.

 

 

     “Agent Members” has the meaning set forth in Section 2.1(e)(ii).

     “Applicable Conversion Rate” means, at any given time, the Conversion Rate then in effect,
rounded to the nearest 1/10,000th of a share.

     “Applicable Procedures” means, with respect to any transfer or exchange of or for beneficial
interests in, or any repurchase or conversion of, any Global Note, the rules and procedures of the
Depositary that apply to such transfer or exchange.

     “Authenticating Agent” has the meaning set forth in Section 2.2.

     “Bankruptcy Law” means Title 11, United States Code or any similar federal or state law
relating to bankruptcy, insolvency, receivership, winding-up, liquidation, reorganization or relief
of debtors or the law of any other jurisdiction relating to bankruptcy, insolvency, receivership,
winding-up, liquidation, reorganization or relief of debtors or any amendment to, succession to or
change in any such law.

     “Beneficial Owner” has the meaning assigned to such term in Rule 13d-3 under the Exchange Act.
The terms “Beneficial Ownership” and “Beneficially Owns” have a corresponding meaning.

     “Board of Directors” means the board of directors of the Company or any duly authorized
committee thereof.

     “Board Resolution” means a copy of a resolution certified by the Secretary or an Assistant
Secretary of the Company to have been duly adopted by the Board of Directors and to be in full
force and effect on the date of such certification, and delivered to the Trustee.

     “Business Day” means each day that is not a Saturday, Sunday or other day on which banking
institutions in New York, New York are authorized or required by law, regulation or executive order
to close.

     “Capital Stock” means:

     (1) in the case of a corporation, corporate stock;

     (2) in the case of an association or business entity, shares, interests, participations,
rights or other equivalents (however designated) of corporate stock;

     (3) in the case of a partnership or limited liability company, partnership or membership
interests (whether general or limited); and

     (4) any other interest or participation that confers on a Person the right to receive a share
of the profits and losses of, or distributions of the assets of, the issuing Person.

2

 

     “Closing Sale Price” means, with respect to the Common Stock, on any date, the last reported
closing price per share (or, if no last closing price is reported, the average of the last bid and
ask prices or, if more than one in either case, the average of the average bid and the average
ask prices) on such date as reported in composite transactions for the principal U.S.
securities exchange on which the Common Stock then is listed or, if the Common Stock is not listed
on a U.S. national or regional exchange, as reported on NASDAQ or, if the Common Stock is not
traded on NASDAQ, the “Closing Sale Price” will be the last quoted bid price for the Common Stock
in the over-the-counter market on the relevant dates as reported by the National Quotation Bureau
Incorporated or any similar U.S. system of automated dissemination of quotations of securities
prices. If the Common Stock is not so traded, the “Closing Sale Price” will be the price as
reported on the principal other market on which the Common Stock is then traded. In the absence of
such quotations, the Company’s Board of Directors will make a good faith determination of the
Closing Sale Price.

     “Commission” means the Securities and Exchange Commission.

     “Common Stock” means the common stock of the Company, par value $0.01 per share, as it exists
on the date of this Indenture, or to the extent such common stock is reclassified or otherwise
ceases to exist, any class of Capital Stock of the Company that (1) is Voting Stock and (2) has no
preference in respect of dividends or of amounts payable in the event of any voluntary or
involuntary liquidation, dissolution or winding up of the issuer thereof and which is not subject
to redemption by the issuer thereof.

     “Company” means Ciena Corporation, a corporation incorporated under the laws of Delaware, and,
subject to Article IV, its successors and assigns.

     “Company Order” has the meaning set forth in Section 2.2.

     “Continuing Directors” means, as of any date of determination, any member of the Board of
Directors of the Company who:

     (1) was a member of such Board of Directors on the date of this Indenture; or

     (2) becomes a member of the Board of Directors of the Company subsequent to that date and was
appointed, nominated for election or elected to such Board of Directors with the approval of (a) a
majority of the Continuing Directors who were members of such Board of Directors at the time of
such appointment, nomination or election, or (b) a majority of the Continuing Directors that were
serving at the time of such appointment, nomination or election on a committee of the Board of
Directors that appointed or nominated for election or reelection such Board member.

     “Conversion Agent” means the office or agency designated by the Company where Notes may be
presented for conversion, initially the Trustee.

     “Conversion Date” has the meaning set forth in Section 6.3(a).

     “Conversion Notice” has the meaning set forth in Section 6.3(a).

     “Conversion Price” shall equal $1,000 divided by the Conversion Rate (rounded to the nearest
1/10th of a cent).

3

 

     “Conversion Rate” has the meaning set forth in Section 6.1(c).

     “Corporate Trust Office” means the designated corporate trust office of the Trustee at which
at any time its corporate trust business shall be administered, which office at the date hereof is
located at 101 Barclay Street, Floor 8W, New York, New York 10286, Attention: Corporate Trust
Administration, or such other address as the Trustee may designate from time to time by notice to
the Holders and the Company, or the designated corporate trust office of any successor Trustee (or
such other address as such successor Trustee may designate from time to time by notice to the
Holders and the Company).

     “Current Market Price” as of any date means:

     (1) for the purpose of any computation under Section 6.5(a) (except for clauses (6) and (8)
thereof), the average of the Closing Sale Prices for the five consecutive Trading Days ending on
the Trading Day prior to the earlier of the record date or the ex-dividend Trading Day for the
event triggering such adjustment;

     (2) for the purpose of any computation under Section 6.5(a)(6), the average of the Closing
Sale Prices for the five consecutive Trading Days ending on the Trading Day prior to the
ex-dividend Trading Day for such distribution; and

     (3) for the purpose of any computation under Section 6.5(a)(8), the average of the Closing
Sale Prices for the five consecutive Trading Days beginning on the Trading Day immediately
following the date of the repurchase triggering the adjustment.

     “Daily Adjustment” for any given Trading Day shall equal a fraction:

     (1) the numerator of which shall be the Closing Sale Price of the Common Stock on such Trading
Day plus the closing price of the portion of those shares of Capital Stock or similar Equity
Interests so distributed applicable to one share of Common Stock on such Trading Day; and

     (2) the denominator of which shall be the product of ten (10) and the Closing Sale Price of
the Common Stock on such Trading Day.

     “Default” means an event that is, or after notice or passage of time, or both, would be an
Event of Default with respect to the Notes.

     “Defaulted Interest” has the meaning set forth in Section 2.9.

     “Definitive Notes” means the Notes that are in registered definitive form.

     “Depositary” means The Depository Trust Company, its nominees and their respective successors
and assigns, or such other depositary institution hereinafter appointed by the Company.

     “Distributed Assets” has the meaning set forth in Section 6.5(a)(4).

4

 

     “Effective Date” means the date on which a Fundamental Change transaction becomes effective.

     “Equity Interests” means Capital Stock and all warrants, options or other rights to acquire
Capital Stock (but excluding any debt security that is convertible into, or exchangeable for,
Capital Stock).

     “Event of Default” means any event or condition specified as such in Section 7.1.

     “Exchange Act” means the Securities Exchange Act of 1934, as amended, and the rules and
regulations promulgated thereunder.

     “ex-dividend date” when used with respect to any issuance or distribution shall mean the first
date upon which a sale of shares of Common Stock does not automatically transfer the right to
receive the relevant dividend or distribution from the seller of such Common Stock to the buyer.

     “Expiration Date” has the meaning set forth in Section 6.5(a)(7).

     “Fair Market Value” means the value that would be paid by a willing buyer to an unaffiliated
willing seller in a transaction not involving distress or necessity of either party, determined in
good faith by the Board of Directors of the Company or, unless otherwise provided in this
Indenture, by any Responsible Officer delegated by the Board of Directors to make such
determination on their behalf.

     “Fundamental Change” will be deemed to have occurred at the time after the Notes are
originally issued that any of the following occurs:

     (1) the Common Stock (or other common stock into which the Notes are convertible) is neither
quoted on NASDAQ or another established automated over-the-counter trading market in the United
States or traded on the NYSE or another U.S. national securities exchange; or

     (2) any Person, including any syndicate or group deemed to be a “person” under Section
13(d)(3) of the Exchange Act, acquires Beneficial Ownership, directly or indirectly, through a
purchase, merger or other acquisition transaction or series of transactions, of shares of the
Company’s Capital Stock entitling such Person to exercise 50% or more of the total voting power of
all shares of the Company’s Capital Stock entitled to vote generally in elections of directors,
other than an acquisition by the Company, any of its Subsidiaries or any of the Company’s employee
benefit plans; or

     (3) the Company merges or consolidates with or into any other Person (other than a
Subsidiary), another Person (other than a Subsidiary) merges with or into the Company, or the
Company conveys, sells, transfers or leases all or substantially all of the Company’s assets to
another Person, including any syndicate or group deemed to be a “person” under Section 13(d)(3) of
the Exchange Act, other than any transaction:

          (a) that does not result in a reclassification, conversion, exchange or cancellation of the
Company’s outstanding Common Stock; or

5

 

          (b) pursuant to which the holders of the Common Stock immediately prior to the transaction
have the entitlement to exercise, directly or indirectly, 50% or more of the voting power of all
shares of Capital Stock entitled to vote generally in the election of directors of the continuing
or surviving corporation immediately after the transaction; or

          (c) which is effected solely to change the Company’s jurisdiction of incorporation and results
in a reclassification, conversion or exchange of outstanding shares of the Common Stock solely
into shares of common stock of the surviving entity; or

     (4) at any time the Continuing Directors do not constitute a majority of the Company’s Board
of Directors (or, if applicable, a successor Person to the Company).

     “Fundamental Change Notice” has the meaning set forth in Section 3.7(a).

     “Fundamental Change Repurchase Date” has the meaning set forth in Section 3.7(a).

     “Fundamental Change Repurchase Notice” has the meaning set forth in Section 3.7(c).

     “Fundamental Change Repurchase Right Notice” has the meaning set forth in Section 3.7(b).

     “GAAP” means generally accepted accounting principles set forth in the opinions and
pronouncements of the Accounting Principles Board of the American Institute of Certified Public
Accountants and statements and pronouncements of the Financial Accounting Standards Board or in
such other statements by such other entity as may be approved by a significant segment of the
accounting profession of the United States, as in effect on the date hereof.

     “Global Notes” means Notes that are in the form of the Note attached hereto as Exhibit A and
that are issued to a Depositary.

     “Government Securities” means direct obligations of, or obligations guaranteed by, the United
States of America, and for the payment of which the United States pledges its full faith and
credit.

     “guarantee” means, as applied to any obligation, (i) a guarantee (other than by endorsement of
negotiable instruments for collection in the ordinary course of business), direct or indirect, in
any manner, of any part or all of such obligation and (ii) an agreement, direct or indirect,
contingent or otherwise, the practical effect of which is to assure in any way the payment or
performance (or payment of damages in the event of non-performance) of all or any part of such
obligation. A guarantee shall include, without limitation, any agreement to maintain or preserve
any other Person’s financial condition or to cause any other Person to achieve certain levels of
operating results.

     “Holder” means a Person in whose name a Note is registered.

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     “Indebtedness” of any Person means indebtedness for borrowed money and indebtedness under
purchase money Liens or conditional sales or similar title retention agreements, in each case where
such indebtedness has been created, incurred, or assumed by such Person to the
extent such indebtedness would appear as a liability upon a balance sheet of such Person
prepared in accordance with GAAP, guarantees by such Person of such indebtedness, and indebtedness
for borrowed money secured by any Lien, pledge or other lien or encumbrance upon property owned by
such Person, even though such Person has not assumed or become liable for the payment of such
indebtedness.

     “Indenture” means this Indenture as amended or supplemented from time to time, including, for
all purposes of this instrument and any supplemental indenture or amendment hereto, the provisions
of the TIA that are deemed to be a part of and govern this instrument and any such supplemental
indenture or amendment, respectively.

     “Initial Notes” means the $500,000,000 aggregate principal amount of Notes issued under this
Indenture on the date hereof.

     “Interest Payment Date” has the meaning set forth in the form of Note attached hereto as
Exhibit A.

     “Lien” means any security interest, pledge, lien or other encumbrance.

     “Market Capitalization” means the product of (1) the Current Market Price of the Common Stock
and (2) the number of shares of Common Stock then outstanding on the date of the repurchase of
Common Stock triggering the adjustment set forth in Section 6.5(a)(8) hereof immediately prior to
such repurchase.

     “Maturity” means, with respect to any Note, the date on which the principal of such Note
becomes due and payable as therein or herein provided, whether at Stated Maturity, or by
declaration of acceleration, offer to repurchase pursuant to Section 3.7 or otherwise.

     “NASDAQ” means The NASDAQ Stock Market, Inc. and any successor market or exchange.

     “Note” or “Notes” has the meaning stated in the first recital of this Indenture or, as the
case may be, means Notes that have been authenticated and delivered pursuant to this Indenture,
including the Global Note(s). The Initial Notes and the Additional Notes, if any, shall be treated
as a single class for all purposes under this Indenture, and unless the context otherwise requires,
all references to the Notes shall include the Initial Notes and any Additional Notes.

     “Note Register” has the meaning set forth in Section 2.3.

     “Notes Custodian” means the Trustee or any Person appointed by the Trustee to act as custodian
of Global Notes for the Depositary.

     “NYSE” means The New York Stock Exchange and any successor market or exchange.

     “Officer” means an Executive Chairman of the Board, an Executive Vice President, a Senior Vice
President, the President, a Vice President, the Secretary, an Assistant Secretary, the Treasurer or
an Assistant Treasurer of the Company.

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     “Officers’ Certificate” means a certificate in a form reasonably acceptable to the Trustee and
signed by any two Officers of the Company. Each such certificate shall include the statements
provided for in Section 11.5, if and to the extent required by the provisions of Section 11.4.

     “Opinion of Counsel” means a written opinion from legal counsel reasonably acceptable to the
Trustee; provided, however, that counsel that is an employee of, or counsel to, the Company shall
be acceptable to the Trustee. Each such opinion shall include the statements provided for in
Section 11.5, if and to the extent required by the provisions of Section 11.4.

     “Outstanding”, when used with respect to Notes, means, as of the date of determination, all
Notes theretofore authenticated and delivered under this Indenture, except:

     (1) Notes theretofore cancelled by the Trustee or delivered to the Trustee for cancellation
(including Notes converted and cancelled pursuant to this Indenture);

     (2) Notes for whose payment money in the necessary amount has been theretofore deposited with
the Trustee or any Paying Agent (other than the Company) in trust or set aside and segregated in
trust by the Company (if the Company shall act as its own Paying Agent) for the Holders of such
Notes; and

     (3) Notes which have been paid pursuant to Section 2.7 or in exchange for or in lieu of which
other Notes have been authenticated and delivered pursuant to this Indenture, other than any such
Notes in respect of which there shall have been presented to the Trustee proof satisfactory to it
that such Notes are held by a bona fide purchaser in whose hands such Notes are valid obligations
of the Company;

provided, however, that in determining whether the Holders of the requisite principal amount of the
Outstanding Notes have given, made or taken any request, demand, authorization, direction, notice,
consent, waiver or other action hereunder, Notes owned by the Company or any other obligor upon the
Notes or any Affiliate of the Company or of such other obligor shall be disregarded and deemed not
to be Outstanding, except that, in determining whether the Trustee shall be protected in relying
upon any such request, demand, authorization, direction, notice, consent, waiver or other action,
only Notes which the Trustee knows to be so owned shall be so disregarded. Notes so owned which
have been pledged in good faith may be regarded as Outstanding if the pledgee establishes to the
satisfaction of the Trustee the pledgee’s right so to act with respect to such Notes and that the
pledgee is not the Company or any other obligor upon the Notes or any Affiliate of the Company or
of such other obligor.

Upon the written request of the Trustee, the Company shall furnish to the Trustee promptly an
Officers’ Certificate listing and identifying all Notes, if any, known by the Company to be owned
by, held by or for the account of the Company, or any other obligor on the Notes or any Affiliate
of the Company or such obligor, and subject to the provisions of Section 8.2, the Trustee shall be
entitled to accept such Officers’ Certificate as conclusive evidence of the facts therein set forth
and of the fact that all Notes not listed therein are Outstanding for the purpose of any such
determination.

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     “Paying Agent” means the office or agency designated by the Company where Notes may be
presented for payment, initially the Trustee.

     “Person” means any individual, corporation, partnership, limited liability company, joint
venture, association, joint-stock company, trust, unincorporated organization, government or any
agency or political subdivision thereof or any other entity.

     “protected purchaser” has the meaning set forth in Section 2.7.

     “Record Date Period” means the period from the close of business on any Regular Record Date
immediately preceding any Interest Payment Date to the opening of business on such Interest Payment
Date.

     “Registrar” means the office or agency maintained by the Company where Notes may be presented
for registration of transfer or exchange, initially the Trustee.

     “Regular Record Date” has the meaning set forth in the form of Note attached hereto as Exhibit
A.

     “Repurchase Premium” has the meaning set forth in Section 6.5(a)(8).

“Responsible Officer” means, when used with respect to the Trustee, any officer within the
corporate trust department of the Trustee, including any vice president, assistant vice president,
assistant secretary, assistant treasurer, trust officer or any other officer of the Trustee who
customarily performs functions similar to those performed by the Persons who at the time shall be
such officers, respectively, or to whom any corporate trust matter is referred because of such
person’s knowledge of and familiarity with the particular subject and who shall have direct
responsibility for the administration of this Indenture.

     “Securities Act” means the Securities Act of 1933, as amended.

     “Settlement” has the meaning set forth in Section 6.3(c).

     “Special Interest Payment Date” has the meaning set forth in Section 2.9(a).

     “Special Record Date” has the meaning set forth in Section 2.9(a).

     “Spin-off” has the meaning set forth in Section 6.5(a)(5).

     “Stated Maturity,” when used with respect to the Notes, means June 15, 2017.

     “Stock Price” means the price paid per share of Common Stock in the applicable Fundamental
Change transaction; provided that (1) if holders of Common Stock receive only cash in such
Fundamental Change transaction, the Stock Price will be the cash amount paid per share of Common
Stock and (2) in any other Fundamental Change transaction, the Stock Price will be the average of
the Closing Sale Prices on each of the five consecutive Trading Days prior to but not including the
Effective Date of such Fundamental Change.

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     “Subsidiary” means any corporation or other business entity of which at least a majority of
the outstanding stock or membership or other interest, as the case may be, having voting power
under ordinary circumstances to elect a majority of the board of directors, managers or other
governing body of such corporation or business entity or otherwise direct the business and affairs
of said corporation or business entity is at the time owned or controlled by the Company, or by the
Company and one or more Subsidiaries, or by any one or more Subsidiaries.

     “TIA” or “Trust Indenture Act” means the Trust Indenture Act of 1939 (15 U.S.C. §§
77aaa-77bbbb), as in effect from time to time.

     “Trading Day” means a day during which trading in securities generally occurs on NASDAQ, or,
if the Common Stock is not then traded on NASDAQ, then on the NYSE or another national or regional
securities exchange on which the Common Stock is then listed or, if the Common Stock is not listed
on a national or regional securities exchange or on NASDAQ, on the principal other market on which
the Common Stock is then traded or quoted.

     “Trigger Event” has the meaning set forth in Section 6.9.

     “Trustee” means the Person identified as “Trustee” in the first paragraph hereof and, subject
to the provisions of Article VIII, shall also include any successor trustee.

     “Uniform Commercial Code” means the New York Uniform Commercial Code as in effect from time to
time in the State of New York.

     “Voting Stock” of any specified Person as of any date means the Capital Stock of such Person
that is at the time entitled to vote in the election of the Board of Directors of such Person.

     SECTION 1.2. Incorporation by Reference of Trust Indenture Act.

     This Indenture is subject to the mandatory provisions of the TIA, which are incorporated by
reference in and made a part of this Indenture. The following TIA terms have the following
meanings:

     “indenture securities” means the Notes.

     “indenture security holder” means a Holder.

     “indenture to be qualified” means this Indenture.

     “indenture trustee” or “institutional trustee” means the Trustee.

     “obligor” on the indenture securities means the Company and any other obligor on the indenture
securities.

     All other TIA terms used in this Indenture that are defined by the TIA, defined by the TIA by
reference to another statute or defined by Commission rule have the meanings assigned to them by
such definitions.

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     SECTION 1.3. Rules of Construction. Unless the context otherwise requires:

     (1) a term has the meaning assigned to it;

     (2) an accounting term not otherwise defined has the meaning assigned to it in accordance with
GAAP;

     (3) “or” is not exclusive;

     (4) words in the singular include the plural and words in the plural include the singular;

     (5) the principal amount of any non-interest bearing or other discount security at any date
shall be the principal amount thereof that would be shown on a balance sheet of the issuer dated
such date prepared in accordance with GAAP;

     (6) the table of contents and headings of the Articles and Sections of this Indenture have
been inserted for convenience of reference only, are not intended to be considered a part hereof
and shall not modify or restrict any of the terms or provisions hereof;

     (7) the words “herein,” “hereof” and “hereunder” and other words of similar import refer to
this Indenture as a whole and not to any particular Article, Section or other subdivision;

     (8) all references to “$” or “dollars” shall refer to the lawful currency of the United States
of America;

     (9) the words “include,” “included” and “including” as used herein shall be deemed in each
case to be followed by the phrase “without limitation,” if not expressly followed by such phrase or
the phrase “but not limited to”;

     (10) references to sections of or rules under the Securities Act, the Exchange Act or the TIA
shall be deemed to include substitute, replacement or successor sections or rules adopted by the
Commission from time to time thereunder; and

     (11) any reference to a Section or Article refers to such Section or Article of this Indenture
unless otherwise indicated.

ARTICLE II

THE NOTES

     SECTION 2.1. Form, Dating and Terms.

          (a) The Notes shall be known and designated as 0.875% Convertible Senior Notes due 2017.
Pursuant to the provisions of Article VI, the Notes shall be convertible into Common Stock.
Subject to the terms of this Indenture the Company may, at its option, without consent from the
Holders, issue Additional Notes from time to time. For all purposes under the
Indenture, the term “Notes” shall include the Initial Notes and any such Additional Notes
issued after the date of this Indenture.

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     Notes may be authenticated and delivered upon registration or transfer of, or in lieu of,
other Notes pursuant to Section 2.6, 2.7 or 10.8.

     The Notes may have notations, legends or endorsements required by law, stock exchange rule or
usage, in addition to those set forth on Exhibit A. The Company and the Trustee shall approve the
forms of the Notes and any notation, endorsement or legend on them. Each Note shall be dated the
date of its authentication. The terms of the Note set forth in Exhibit A are part of the terms of
this Indenture and, to the extent applicable, the Company and the Trustee, by their execution and
delivery of this Indenture, expressly agree to be bound by such terms.

     The principal of and interest on the Notes shall be payable at the office or agency of the
Company maintained for such purpose in the City of New York, or at such other office or agency of
the Company as may be maintained for such purpose pursuant to Section 2.3. Payments in respect of a
Definitive Note (including principal and interest) shall be made in U.S. dollars at the office of
the Trustee. At the Company’s option, however, the Company may make such payments by mailing a
check to the registered address of each Holder thereof as such address as shall appear on the Note
Register or with respect to Notes represented by a Global Note, by wire transfer of immediately
available funds to the accounts specified by the Depositary. If a payment date is a date other than
a Business Day, payment may be made at that place on the next succeeding day that is a Business Day
and no interest shall accrue for the intervening period.

          (b) The Notes shall be initially issued in the form of one or more permanent Global Notes,
without interest coupons, substantially in the form of Exhibit A. Such Global Notes shall be
deposited on behalf of the purchasers of the Notes represented thereby with the Notes Custodian for
the Depositary for the accounts of participants in the Depositary, duly executed by the Company and
authenticated by the Trustee as hereinafter provided. The aggregate principal amount of a Global
Note may from time to time be increased or decreased by adjustments made on the records of the
Notes Custodian, as hereinafter provided.

          (c) The Notes shall be issuable only in fully registered form, without coupons, and only in
denominations of $2,000 and $1,000 integral multiples thereof.

          (d) Each Global Note shall bear the following legend:

“THIS SECURITY IS A GLOBAL SECURITY WITHIN THE MEANING OF THE INDENTURE HEREINAFTER
REFERRED TO AND IS REGISTERED IN THE NAME OF THE DEPOSITORY TRUST COMPANY, A NEW
YORK CORPORATION (“DEPOSITARY”), OR A NOMINEE OF THE DEPOSITARY, WHICH MAY BE
TREATED BY THE COMPANY, THE TRUSTEE AND ANY AGENT THEREOF AS THE OWNER AND HOLDER OF
THIS SECURITY FOR ALL PURPOSES. UNLESS THIS CERTIFICATE IS PRESENTED BY AN
AUTHORIZED REPRESENTATIVE OF THE DEPOSITARY TO THE COMPANY OR ITS AGENT FOR
REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY CERTIFICATE

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ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR IN SUCH OTHER NAME AS IS REQUESTED
BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITARY (AND ANY PAYMENT IS MADE TO CEDE &
CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF THE
DEPOSITARY), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR
TO ANY PERSON IS WRONGFUL INASMUCH AS THE REGISTERED OWNER HEREOF, CEDE & CO., HAS
AN INTEREST HEREIN.

“TRANSFERS OF THIS GLOBAL SECURITY SHALL BE LIMITED TO TRANSFERS IN WHOLE, BUT NOT
IN PART, BY THE DEPOSITARY TO A NOMINEE OF THE DEPOSITARY OR BY A NOMINEE OF THE
DEPOSITARY TO THE DEPOSITARY OR ANOTHER NOMINEE OF THE DEPOSITARY OR BY THE
DEPOSITARY OR ANY SUCH NOMINEE TO A SUCCESSOR DEPOSITARY OR A NOMINEE OF SUCH
SUCCESSOR DEPOSITARY, AND TRANSFERS OF PORTIONS OF THIS GLOBAL SECURITY SHALL BE
LIMITED TO TRANSFERS MADE IN ACCORDANCE WITH THE RESTRICTIONS SET FORTH IN THE
INDENTURE REFERRED TO ON THE REVERSE HEREOF.”

          (e) The following book-entry provisions shall apply to Global Notes deposited with the Notes
Custodian:

               (i) Each Global Note initially shall (x) be registered in the name of the Depositary for such
Global Note or the nominee of such Depositary and (y) be delivered to the Notes Custodian.

               (ii) Except as provided herein, members of, or participants in, the Depositary (“Agent
Members”) shall have no rights under this Indenture with respect to any Global Note held on their
behalf by the Depositary or by the Notes Custodian or under such Global Note, and the Depositary
may be treated by the Company, the Trustee, the Notes Custodian and any agent of the Company or the
Trustee as the absolute owner of such Global Note for all purposes whatsoever. Notwithstanding the
foregoing, nothing herein shall prevent the Company, the Trustee or any agent of the Company or the
Trustee from giving effect to any written certification, proxy or other authorization furnished by
the Depositary or impair, as between the Depositary and its Agent Members, the operation of
customary practices of the Depositary governing the exercise of the rights of a Beneficial Owner of
an interest in any Global Note.

               (iii) The registered Holder of a Global Note may grant proxies and otherwise authorize any
Person, including Agent Members and Persons that may hold interests through Agent Members, to take
any action that a Holder is entitled to take under this Indenture or the Notes.

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               (iv) In connection with the transfer of an entire Global Note to Beneficial Owners pursuant to
Section 2.1(f), such Global Note shall be deemed to be
surrendered to the Trustee for cancellation, and the Company shall execute, and the Trustee
shall authenticate and deliver, to each Beneficial Owner identified by the Depositary in exchange
for its beneficial interest in such Global Note, an equal aggregate principal amount of Definitive
Notes of authorized denominations. The definitive securities shall be printed, lithographed or
engraved or produced by any combination of these methods, if required by any securities exchange on
which the Notes may be listed, on a steel engraved border or steel engraved borders or may be
produced in any other manner permitted by the rules of any securities exchange on which the Notes
may be listed, all as determined by the officers executing such Notes, as evidenced by their
execution of such Notes.

               (v) Any Holder of a Global Note shall, by acceptance of such Global Note, agree that transfers
of beneficial interests in such Global Note may be effected only through a book-entry system
maintained by (a) the Holder of such Global Note (or its agent) or (b) any Holder of a beneficial
interest in such Global Note, and that ownership of a beneficial interest in such Global Note shall
be required to be reflected in a book entry.

          (f) Owners of beneficial interests in Global Notes will not be entitled to receive Definitive
Notes; provided, however, Definitive Notes shall be transferred to all Beneficial Owners in
exchange for their beneficial interests in a Global Note if the Depositary notifies the Company
that it is unwilling or unable to continue as depositary for such Global Note or the Depositary
ceases to be a clearing agency registered under the Exchange Act, at a time when the Depositary is
required to be so registered in order to act as Depositary, and in each case a successor depositary
is not appointed by the Company within 90 days of such notice. The Company shall promptly deliver
a copy of any notice referred to in the foregoing sentence to the Trustee.

     SECTION 2.2. Execution and Authentication.

          An Officer shall sign the Notes for the Company by manual or facsimile signature. If an
Officer whose signature is on a Note no longer holds that office at the time the Trustee
authenticates the Note, the Note shall be valid nevertheless.

     A Note shall not be valid until an authorized signatory of the Trustee manually authenticates
the Note. The signature of the Trustee on a Note shall be conclusive evidence that such Note has
been duly and validly authenticated and issued under this Indenture.

     The Trustee will, upon receipt of a written order of the Company signed by an Officer of the
Company (a “Company Order”), authenticate Notes, including any Additional Notes, in an unlimited
aggregate principal amount, subject to the provisions of this Indenture. Each Company Order will
specify the amount of Notes to be authenticated, the date on which the Notes are to be
authenticated and, in the case of Additional Notes, the issue price of such Notes.

     The Trustee may appoint an agent (the “Authenticating Agent”) reasonably acceptable to the
Company to authenticate the Notes. Unless limited by the terms of such appointment, any such
Authenticating Agent may authenticate Notes whenever the Trustee may do so. Each reference in this
Indenture to authentication by the Trustee includes authentication by such Authenticating Agent.

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     In case the Company pursuant to Article IV shall be consolidated or merged with or into any
other Person or shall convey, transfer, lease or otherwise dispose of its properties and assets
substantially as an entirety to any Person, and the successor Person resulting from such
consolidation, or surviving such merger, or into which the Company shall have been merged, or the
Person that shall have received a conveyance, transfer, lease or other disposition as aforesaid,
shall have executed an indenture supplemental hereto with the Trustee pursuant to Article IV, any
of the Notes authenticated or delivered prior to such consolidation, merger, conveyance, transfer,
lease or other disposition may, from time to time, at the request of the successor Person, be
exchanged for other Notes executed in the name of the successor Person with such changes in
phraseology and form as may be appropriate, but otherwise in substance of like tenor as the Notes
surrendered for such exchange and of like principal amount; and the Trustee, upon Company Order of
the successor Person, shall authenticate and deliver Notes as specified in such order for the
purpose of such exchange. If Notes shall at any time be authenticated and delivered in any new name
of a successor Person pursuant to this Section 2.2 in exchange or substitution for or upon
registration of transfer of any Notes, such successor Person, at the option of the Holders but
without expense to them, shall provide for the exchange of all Notes at the time outstanding for
Notes authenticated and delivered in such new name.

     SECTION 2.3. Registrar, Conversion Agent and Paying Agent.

          The Trustee shall initially serve as the Registrar, Conversion Agent and Paying Agent for the
Notes. The Registrar, the Conversion Agent and the Paying Agent shall each maintain an office or
agency in the Borough of Manhattan, The City of New York. The Registrar shall keep a register of
the Notes and of their transfer and exchange (the “Note Register”). The Company may have one or
more co-registrars and one or more additional conversion agents and paying agents. The term Paying
Agent includes any additional paying agents, the term Conversion Agent includes any additional
conversion agents and the term Registrar includes any co-registrar. The Company may appoint and
change any Paying Agent, Conversion Agent or Registrar without prior notice to any Holder.

     The Company shall enter into an appropriate agency agreement with any Registrar, Conversion
Agent or Paying Agent not a party to this Indenture, which shall incorporate the terms of the TIA.
The agreement shall implement the provisions of this Indenture that relate to such agent. The
Company shall notify the Trustee in writing of the name and address of each such agent. If the
Company fails to maintain a Registrar, Conversion Agent or Paying Agent, the Trustee shall act as
such and shall be entitled to appropriate compensation therefor pursuant to Section 8.7. The
Company or any of its domestically incorporated Subsidiaries may act as Paying Agent, Conversion
Agent or Registrar.

     The Company may remove any Registrar, Conversion Agent or Paying Agent upon written notice to
such Registrar, Conversion Agent or Paying Agent and to the Trustee; provided, however, that no
such removal shall become effective until (i) acceptance of any appointment by a successor as
evidenced by an appropriate agreement entered into by the Company and such successor Registrar,
Conversion Agent or Paying Agent, as the case may be, and such agreement is delivered to the
Trustee or (ii) notification to the Trustee that the Trustee shall serve as Registrar, Conversion
Agent or Paying Agent until the appointment of a successor in accordance
with clause (i) above. The Registrar, Conversion Agent or Paying Agent may resign at any time
upon written notice to the Company and the Trustee.

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     SECTION 2.4. Paying Agent To Hold Money and Securities in Trust.

     Except as otherwise provided herein, on or prior to 10:00 a.m. (New York City time) on each
due date of payment in respect of any Note, the Company shall deposit with the Paying Agent a sum
of money (in immediately available funds) sufficient to make such payments when due. The Company
shall require each Paying Agent (other than the Trustee) to agree in writing that such Paying Agent
shall hold in trust for the benefit of Holders or the Trustee all money held by such Paying Agent
for the payment of principal of, interest on, and other payments in respect of the Notes, and shall
notify the Trustee in writing of any default by the Company in making any such payment. If the
Company or a Subsidiary acts as Paying Agent, it shall segregate the money held by it as Paying
Agent and hold it as a separate trust fund for the benefit of the Holders of the Notes. The
Company at any time may require a Paying Agent (other than the Trustee) to pay all money held by it
to the Trustee and to account for any funds disbursed by such Paying Agent. Upon complying with
this Section 2.4, the Paying Agent (if other than the Company or a Subsidiary) shall have no
further liability for the money delivered to the Trustee. Upon any bankruptcy, reorganization or
similar proceeding with respect to the Company, the Trustee shall serve as Paying Agent for the
Notes.

     SECTION 2.5. Holder Lists.

     The Trustee shall preserve in as current a form as is reasonably practicable the most recent
list available to it of the names and addresses of Holders and shall otherwise comply with TIA §
312(a). If the Trustee is not the Registrar or to the extent otherwise required under the TIA, the
Company, on its own behalf, shall furnish to the Trustee, in writing at least seven Business Days
before each Interest Payment Date and at such other times as the Trustee may reasonably request in
writing within 15 days, a list in such form and as of such date as the Trustee may reasonably
require of the names and addresses of Holders and the Company shall otherwise comply with TIA §
312(a).

     SECTION 2.6. Transfer and Exchange.

          (a) The Registrar shall retain copies of all letters, notices and other written communications
received pursuant to Section 2.1 or this Section 2.6 until the Notes have matured and been paid in
full. The Company shall have the right to inspect and make copies of all such letters, notices or
other written communications at any reasonable time during regular business hours upon the giving
of reasonable prior written notice to the Registrar.

          (b) The following obligations with respect to transfers and exchanges of Notes shall apply:

               (i) To permit registrations of transfers and exchanges, the Company shall, subject to the
other terms and conditions of this Article II, execute and the Trustee shall upon receipt of a
Company Order, authenticate Definitive Notes and Global Notes at the Registrar’s request.

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               (ii) No service charge shall be made to a Holder for any registration of transfer or exchange,
but the Company may require payment of a sum sufficient to cover any transfer tax, assessments or
similar governmental charge payable in connection therewith (other than any such transfer taxes,
assessments or similar governmental charges payable upon exchange or transfer pursuant to Section
3.6).

               (iii) The Registrar shall not be required to register the transfer of or exchange of any Note
(A) for a period beginning at the opening of business 15 days before any selection of Notes for
repurchase and ending at the close of business on the day notice of such repurchase is deemed to
have been given to all Holders of Notes to be so repurchased or (B) selected for repurchase in
whole or in part.

               (iv) Except as provided herein, prior to the due presentation for registration of transfer of
any Note, the Company, the Trustee, Paying Agent, the Conversion Agent or the Registrar may deem
and treat the Person in whose name a Note is registered as the absolute owner of such Note for the
purpose of receiving payment of principal of and interest on such Note and for all other purposes
whatsoever, whether or not such Note is overdue, and none of the Company, the Trustee, the Paying
Agent, the Conversion Agent or the Registrar shall be affected by notice to the contrary.

               (v) All Notes issued upon any transfer or exchange pursuant to the terms of this Indenture
shall evidence the same debt and shall be entitled to the same benefits under this Indenture as the
Notes surrendered upon such transfer or exchange.

     SECTION 2.7. Mutilated, Destroyed, Lost or Stolen Notes.

     If a mutilated Note is surrendered to the Registrar or if the Holder of a Note claims that the
Note has been lost, destroyed or wrongfully taken, subject to compliance with the provisions of the
next sentence of this Section 2.7, the Company shall issue and the Trustee, upon Company Order,
shall authenticate a replacement Note if the requirements of Section 8-405 of the Uniform
Commercial Code are met such that the Holder (a) notifies the Company and the Trustee within a
reasonable time after such Holder has notice of such loss, destruction or wrongful taking and the
Registrar has not registered a transfer prior to receiving such notification, (b) makes such
request to the Company prior to the Company having notice that the Note has been acquired by a
protected purchaser as defined in Section 8-303 of the Uniform Commercial Code (a “protected
purchaser”) and (c) satisfies any other reasonable requirements of the Company and the Trustee.
Such Holder shall furnish an indemnity bond sufficient in the judgment of the Company and the
Trustee to protect the Company, the Trustee, the Paying Agent, the Conversion Agent and the
Registrar from any loss which any of them may suffer if a Note is replaced. In the absence of
notice to the Company, the Trustee, Paying Agent, Conversion Agent or Registrar that such Note has
been acquired by a protected purchaser, the Company shall execute and upon Company Order the
Trustee shall authenticate and deliver, in exchange for any such mutilated Note or in lieu of any
such destroyed, lost or stolen Note, a new Note of like tenor and principal amount, bearing a
number not contemporaneously outstanding.

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     In case any such mutilated, destroyed, lost or stolen Note has become or is about to become
due and payable, the Company in its discretion, but subject to any conversion rights,
may, instead of issuing a new Note, pay such Note upon satisfaction of the conditions set
forth in the preceding paragraph.

     Upon the issuance of any new Note under this Section, the Company may require the payment of a
sum sufficient to cover any tax or other governmental charge that may be imposed in relation
thereto and any other expenses (including attorneys’ fees and expenses and the fees and expenses of
the Trustee) in connection therewith.

     Every new Note issued pursuant to this Section in lieu of any mutilated, destroyed, lost or
stolen Note shall constitute an original additional contractual obligation of the Company and any
other obligor upon the Notes, whether or not the mutilated, destroyed, lost or stolen Note shall be
at any time enforceable by anyone, and shall be entitled to all benefits of this Indenture equally
and proportionately with any and all other Notes duly issued hereunder.

     The provisions of this Section are exclusive and shall preclude (to the extent lawful) all
other rights and remedies with respect to the replacement or payment of mutilated, destroyed, lost
or stolen Notes.

     SECTION 2.8. Cancellation.

     The Company at any time may deliver Notes to the Trustee for cancellation. The Registrar and
the Paying Agent shall forward to the Trustee any Notes surrendered to them for registration of
transfer, exchange or payment. The Trustee and no one else shall cancel and dispose of them in
accordance with its customary procedures and upon written request of the Company shall return to
the Company all Notes surrendered for registration of transfer, exchange, payment, purchase,
conversion or cancellation. All Notes so delivered to the Trustee shall be cancelled promptly by
the Trustee. The Company may not issue new Notes to replace Notes it has paid or delivered to the
Trustee for cancellation.

     At such time as all beneficial interests in a Global Note have either been exchanged for
Definitive Notes, transferred, paid, repurchased, converted or canceled, such Global Note shall be
returned by the Depositary or the Notes Custodian to the Trustee for cancellation or retained and
canceled by the Trustee. At any time prior to such cancellation, if any beneficial interest in a
Global Note is exchanged for Definitive Notes, transferred in exchange for an interest in another
Global Note, paid, repurchased, converted or canceled, the principal amount of Notes represented by
such Global Note shall be reduced and an adjustment shall be made on the Global Note and on the
books and records of the Trustee (if it is then the Notes Custodian for such Global Note) with
respect to such Global Note, by the Trustee or the Notes Custodian, to reflect such reduction.

     SECTION 2.9. Payment of Interest; Defaulted Interest.

     Interest on any Note that is payable, and is punctually paid or duly provided for, on any
Interest Payment Date shall be paid to the Person in whose name such Note (or one or more
predecessor Notes) is registered at the close of business on the Regular Record Date for such
interest at the office or agency of the Company maintained for such purpose pursuant to Section
2.3.

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     Any interest on any Note that is payable, but is not paid when the same becomes due and
payable and such nonpayment continues for a period of 30 days shall forthwith cease to be payable
to the Holder on the Regular Record Date, and such defaulted interest and (to the extent lawful)
interest on such defaulted interest at the rate borne by the Notes (such defaulted interest and
interest thereon herein collectively called “Defaulted Interest”) shall be paid by the Company, at
its election, as provided in clause (a) or (b) below:

          (a) The Company may elect to make payment of any Defaulted Interest to the Persons in whose
names the Notes (or their respective predecessor Notes) are registered at the close of business on
a Special Record Date (as defined below) for the payment of such Defaulted Interest, which shall be
fixed in the following manner. The Company shall notify the Trustee in writing of the amount of
Defaulted Interest proposed to be paid on each Note and the date (not less than 30 days after such
notice) of the proposed payment (the “Special Interest Payment Date”), and the Company shall make
arrangements reasonably satisfactory to the Trustee to deposit with the Trustee an amount of money
equal to the aggregate amount proposed to be paid in respect of such Defaulted Interest on or prior
to the date of the proposed payment, such money when deposited to be held in trust for the benefit
of the Persons entitled to such Defaulted Interest as in this clause provided. Thereupon the
Trustee shall fix a record date (the “Special Record Date”) for the payment of such Defaulted
Interest which shall be not more than 15 days and not less than 10 days prior to the Special
Interest Payment Date and not less than 10 days after the receipt by the Trustee of the notice of
the proposed payment. The Trustee shall promptly notify the Company of such Special Record Date,
and in the name and at the expense of the Company, shall cause notice of the proposed payment of
such Defaulted Interest and the Special Record Date and Special Interest Payment Date therefor,
which notice shall be prepared by the Company and shall be in a form reasonably acceptable to the
Trustee, to be given in the manner provided for in Section 11.2, not less than 10 days prior to
such Special Record Date. Notice of the proposed payment of such Defaulted Interest and the
Special Record Date and Special Interest Payment Date therefor having been so given, such Defaulted
Interest shall be paid on the Special Interest Payment Date to the Persons in whose names the Notes
are registered at the close of business on such Special Record Date and shall no longer be payable
pursuant to the following clause (b).

          (b) The Company may make payment of any Defaulted Interest in any other lawful manner not
inconsistent with the requirements of any securities exchange on which the Notes may be listed, and
upon such notice as may be required by such exchange, if, after notice given by the Company to the
Trustee of the proposed payment pursuant to this clause, such manner of payment shall be deemed
practicable by the Trustee.

     Subject to the foregoing provisions of this Section, each Note delivered under this Indenture
upon registration of transfer of, or in exchange for, or in lieu of any other Note shall carry the
rights to interest accrued and unpaid which were carried by such other Note.

     SECTION 2.10. Computation of Interest.

     Interest on the Notes shall be computed on the basis of a 360-day year comprised of twelve
30-day months.

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     SECTION 2.11. CUSIP Numbers.

     The Company in issuing the Notes and Common Stock upon conversion of the Notes may use CUSIP
numbers (if then generally in use). The Trustee shall not be responsible for the use of CUSIP
numbers, and the Trustee makes no representation as to their correctness as printed on any Note,
certificate of Common Stock or notice to Holders and that reliance may be placed only on the other
identification numbers printed on the Notes. The Company shall promptly notify the Trustee in
writing of any change in the CUSIP numbers.

     SECTION 2.12. Calculations in Respect of the Notes.

     The Company shall be responsible for making all calculations called for under the Notes. These
calculations include, but are not limited to, determinations of the Closing Sale Price of the
Common Stock, any accrued interest payable on the Notes and the Conversion Rate of the Notes. The
Company shall make these calculations in good faith and, absent manifest error, such calculations
will be final and binding on Holders of the Notes. The Company shall provide to the Trustee a
schedule of its calculations, and the Trustee, subject to Sections 8.1 and 8.2, shall be entitled
to rely upon the accuracy of such calculations without independent verification. The Trustee shall
forward the Company’s calculations to any Holder of the Notes upon the request of such Holder.

ARTICLE III

COVENANTS

     SECTION 3.1. Payment of Notes.

     The Company will pay or cause to be paid the principal of and interest, if any, on the Notes
on the dates and in the manner provided in the Notes. Principal and interest, if any, will be
considered paid on the date due if the Paying Agent, if other than the Company or a Subsidiary
thereof, holds as of 10:00 a.m. New York City time on the due date money deposited by the Company
in immediately available funds and designated for and sufficient to pay all principal and interest
then due.

     The Company will pay interest on overdue principal at the then applicable interest rate on the
Notes to the extent lawful; it will pay interest on overdue installments of interest (without
regard to any applicable grace period) at the same rate to the extent lawful.

     SECTION 3.2. Maintenance of Office or Agency.

     The Company will maintain in the Borough of Manhattan, the City of New York, an office or
agency (which may be an office of the Trustee or an affiliate of the Trustee, Registrar or
co-registrar) where Notes may be surrendered for registration of transfer or for exchange and where
notices and demands to or upon the Company in respect of the Notes and this Indenture may be
served. The Company will give prompt written notice to the Trustee of the location, and any change
in the location, of such office or agency. If at any time the Company fails to maintain any such
required office or agency or fails to furnish the Trustee with the address
thereof, such presentations, surrenders, notices and demands may be made or served at the
Corporate Trust Office of the Trustee.

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     The Company may also from time to time designate one or more other offices or agencies where
the Notes may be presented or surrendered for any or all such purposes and may from time to time
rescind such designations; provided, however, that no such designation or rescission will in any
manner relieve the Company of its obligation to maintain an office or agency in the Borough of
Manhattan, the City of New York, for such purposes. The Company will give prompt written notice to
the Trustee of any such designation or rescission and of any change in the location of any such
other office or agency.

     The Company hereby designates the Corporate Trust Office of the Trustee as one such office or
agency of the Company.

     SECTION 3.3. Compliance Certificate.

     The Company shall deliver to the Trustee within 120 days after the end of each fiscal year of
the Company an Officers’ Certificate, one of the signatories of which shall be the chief executive
officer, chief financial officer or chief accounting officer of the Company, stating that in the
course of the performance by the signer of his or her duties as an Officer of the Company, he or
she would normally have knowledge of any Default and whether or not such signer knows of any
Default that occurred during such period. If such signer does have knowledge of a Default, the
certificate shall describe the Default, its status and what action the Company is taking or
proposes to take with respect thereto. The Company also shall comply with Section 314(a)(4) of the
TIA.

     The Company shall deliver to the Trustee, as soon as possible and in any event within five
days after the Company becomes aware of the occurrence of any Default or Event of Default, an
Officers’ Certificate setting forth the details of such Default or Event of Default and the action
that the Company is taking or proposes to take with respect thereto.

     SECTION 3.4. Reservation of Common Stock.

     The Company shall at all times reserve and keep available, free from preemptive rights, out of
its authorized but unissued Common Stock or shares held in treasury by the Company, for the purpose
of effecting the conversion of Notes, the full number of shares of Common Stock then issuable upon
the conversion of all outstanding Notes.

     SECTION 3.5. Issuance of Shares.

     All shares of Common Stock delivered upon conversion of the Notes shall be newly issued shares
or shares held in treasury by the Company, shall have been duly authorized and validly issued and
shall be fully paid and nonassessable, and shall be free from preemptive rights and free of any
Lien or adverse claim.

     SECTION 3.6. Transfer Taxes.

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     If a Holder converts Notes for shares of Common Stock, the Company will pay any and all
documentary, stamp or similar issue or transfer tax due on the issue of shares of Common Stock upon
the conversion. The Company shall not, however, be required to pay any tax or duty that may be
payable in respect of any transfer involved in the issue and delivery of shares of Common Stock in
a name other than that of the Holder of the Note or Notes to be converted, and no such issue or
delivery shall be made unless and until the Person requesting such issue has paid to the Company
the amount of any such tax or duty, or has established to the satisfaction of the Company that such
tax or duty has been paid.

     SECTION 3.7. Offer To Repurchase upon a Fundamental Change.

     (a) Subject to Section 3.7(d) hereof, upon the occurrence of a Fundamental Change at any time
prior to Stated Maturity, each Holder may require the Company to repurchase the Notes on a date
chosen by the Company in its sole discretion that is no less than 20 Business Days and no more than
35 Business Days (subject to extension to comply with applicable law) after the Company sends the
Fundamental Change Repurchase Right Notice (the “Fundamental Change Repurchase Date”), and the
Company shall repurchase on the Fundamental Change Repurchase Date, any or all Notes submitted for
repurchase for cash, or any portion of the initial principal amount thereof that is equal to $2,000
or an integral multiple of $1,000, provided that the principal amount of such security to remain
outstanding is equal to $2,000 or an integral multiple of $1,000, at a price equal to 100% of the
aggregate principal amount thereof plus accrued and unpaid interest, if any, to but not including
the Fundamental Change Repurchase Date, unless such Fundamental Change Repurchase Date falls after
a Regular Record Date and on or prior to the corresponding Interest Payment Date, in which case the
Company shall pay the full amount of accrued and unpaid interest payable on such Interest Payment
Date to the Holder of record at the close of business on the corresponding Regular Record Date. At
least 20 Business Days prior to the anticipated Effective Date of the Fundamental Change (or if the
Company does not have actual notice of a Fundamental Change 20 Business Days prior to the Effective
Date, as soon as the Company has actual notice of such Fundamental Change), the Company will
provide to all Holders of the Notes, the Trustee, the Paying Agent, the Registrar and the
Conversion Agent a notice (the “Fundamental Change Notice”) stating:

               (1) if applicable, whether the Company will adjust the Conversion Rate pursuant to Section
6.5(e) hereof;

               (2) the anticipated Effective Date of the Fundamental Change; and

               (3) whether the Company expects that Holders will have the right to require the Company to
repurchase their Notes as described in this Section 3.7.

          (b) On or before the 20th Trading Day after the Effective Date of a Fundamental Change, the
Company will provide to all Holders of the Notes and the Trustee, the Paying Agent, the Registrar
and the Conversion Agent a notice of the occurrence of the Fundamental Change and of the resulting
repurchase right (the “Fundamental Change Repurchase Right Notice”). Each Fundamental Change
Repurchase Right Notice shall state:

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               (1) the events causing the Fundamental Change;

               (2) if the Company is required to adjust the Conversion Rate and related conversion obligation
as described in Section 6.5(e) hereof pursuant to a Fundamental Change that falls under clause (2),
(3) or (4) of the definition of Fundamental Change, the Conversion Rate and any adjustments to the
Conversion Rate;

               (3) the Effective Date, if applicable;

               (4) the last date on which a Holder may exercise such repurchase right;

               (5) the Fundamental Change repurchase price;

               (6) the Fundamental Change Repurchase Date;

               (7) the name and address of the Paying Agent and the Conversion Agent;

               (8) that the Notes with respect to which the Fundamental Change Repurchase Right Notice has
been given may be converted only if the Holder thereof withdraws any Fundamental Change Repurchase
Notice previously delivered by such Holder in accordance with the terms of this Indenture; and

               (9) the procedures that Holders must follow to require the Company to repurchase their Notes.

          (c) A Holder may exercise its right specified in Section 3.7(a) upon delivery of a notice of
repurchase (a “Fundamental Change Repurchase Notice”) in accordance with the requirements below
delivered to the Paying Agent at any time prior to 5:00 p.m., New York City time, on the second
Business Day immediately preceding the Fundamental Change Repurchase Date, stating:

               (1) the Applicable Procedures or, if such Holder holds Definitive Notes, the certificate
numbers of the Notes which the Holder will deliver to be repurchased;

               (2) the portion of the principal amount of the Notes which the Holder will deliver to be
repurchased, which portion must be in a principal amount of $2,000 or an integral multiple of
$1,000 in excess thereof; and

               (3) that such Notes are to be purchased by the Company as of the Fundamental Change Repurchase
Date pursuant to the terms and conditions specified in the Notes and in this Indenture.

     If the Notes are not in certificated form, the Fundamental Change Repurchase Notice must
comply with the Applicable Procedures.

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     The delivery of such Notes (either through the surrender of Definitive Notes or through the
delivery of beneficial interests in a Global Note in accordance with the Applicable Procedures) to
the Paying Agent with, or at any time after delivery of, the Fundamental Change Repurchase Notice
(together with all necessary endorsements) at the offices of the Paying Agent shall be a condition
to the receipt by the Holder of payment therefor; provided, however, that such payment shall be so
paid pursuant to this Section 3.7 only if the Notes so delivered to the Paying Agent shall conform
in all respects to the description thereof in the related Fundamental Change Repurchase Notice. Any
repurchase by the Company pursuant to the provisions of this Section 3.7 shall be consummated by
the delivery of the consideration to be received by the Holder promptly following the later of the
Fundamental Change Repurchase Date and the time of delivery of the Notes.

     Unless the Company defaults in the payment for the Notes to be repurchased pursuant to this
Section 3.7, and provided that the Company or a Subsidiary thereof is not serving as the Paying
Agent and the Paying Agent holds money or securities sufficient to pay the repurchase price of such
Notes on the Fundamental Change Repurchase Date, such Notes will cease to be outstanding and
interest, if any, shall cease to accrue on the Notes or portions thereof delivered for repurchase
on the Fundamental Change Repurchase Date (whether or not book-entry transfer of the Notes is made
or whether or not the Notes are delivered to the Paying Agent) and all other rights of the Holders
of the Notes to be repurchased pursuant to this Section 3.7 shall terminate (other than the right
to receive payment upon delivery or transfer of the Notes).

          (d) The Company will comply with the requirements of Rule 13e-4 and Rule 14e-1 under the
Exchange Act, including the filing of a Schedule TO if required, and will comply with the
requirements of any other federal and state securities laws and regulations thereunder to the
extent those laws and regulations are applicable in connection with the repurchase of the Notes by
the Company as a result of a Fundamental Change. To the extent that the provisions of any
securities laws or regulations conflict with the provisions of this Section 3.7, the Company will
comply with the applicable securities laws and regulations and will not be deemed to have breached
its obligations under this Section 3.7 by virtue of such conflict.

          (e) On or before the Fundamental Change Repurchase Date, the Company will, to the extent
lawful:

               (1) accept for payment all Notes or portions thereof properly tendered;

               (2) deposit with the Paying Agent an amount equal to the payment in respect of all Notes or
portions of Notes properly tendered; and

               (3) deliver or cause to be delivered to the Trustee the Notes so accepted together with an
Officers’ Certificate stating the aggregate principal amount of Notes or portions of Notes being
purchased by the Company in accordance with the terms of this Section 3.7.

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     The Paying Agent will promptly mail to each Holder of Notes properly tendered the payment for
such Notes, and the Trustee will promptly authenticate and mail (or cause to be
transferred by book entry) to each Holder a new Note equal in principal amount to any
unpurchased portion of the Notes surrendered, if any; provided that each new Note will be in a
principal amount of $2,000 and integral multiples of $1,000 in excess thereof.

               Notwithstanding anything contained herein to the contrary, Holders of the Notes will not have
the right to require the Company to repurchase any Notes pursuant to the occurrence of any of the
events identified in clauses (2) or (3) of the definition of Fundamental Change (and the Company
will not be required to deliver the Fundamental Change Repurchase Right Notice incidental thereto),
if at least 90% of the consideration paid for the Common Stock (excluding cash payments for
fractional shares, cash payments made pursuant to dissenters’ appraisal rights and cash dividends)
in a Fundamental Change under clause (2) and/or clause (3) of the definition of Fundamental Change
consists of shares of common stock traded on the NYSE or another U.S. national securities exchange
or quoted on NASDAQ or another established automated over-the-counter trading market in the United
States (or will be so traded or quoted immediately following the merger or consolidation) and, as a
result of such Fundamental Change, the Notes become convertible into such shares of such common
stock.

          (f) Upon receipt by the Paying Agent of a Fundamental Change Repurchase Notice specified in
Section 3.7(c) hereof, the Holder of the Notes in respect of which such Fundamental Change
Repurchase Notice was given shall (unless such Fundamental Change Repurchase Notice is withdrawn as
specified in Section 3.7(g) hereof) thereafter be entitled to receive solely the payment described
in Section 3.7(a) hereof with respect to such Notes. Such payment shall be paid to such Holder,
subject to the Paying Agent holding money or securities sufficient to make such payment on the
Fundamental Change Repurchase Date, promptly following the later of (a) the Fundamental Change
Repurchase Date (provided the conditions in Section 3.7(c) have been satisfied) and (b) the time of
book-entry transfer or the delivery of such Notes to the Paying Agent by the Holder thereof in the
manner required by Section 3.7(c). Notes in respect of which a Fundamental Change Repurchase Notice
has been given by the Holder thereof may not be converted pursuant to Article VI on or after the
date of the delivery of such Fundamental Change Repurchase Notice unless such Fundamental Change
Repurchase Notice has first been validly withdrawn as specified in Section 3.7(g) hereof.

          (g) Notwithstanding anything contained herein to the contrary, any Holder that has delivered
to the Paying Agent the Fundamental Change Repurchase Notice contemplated by Section 3.7(c) hereof
shall have the right to withdraw such Fundamental Change Repurchase Notice, in whole or in part, by
means of a written notice of withdrawal delivered to the Paying Agent at any time prior to 5:00
p.m., New York City time, on the second Business Day immediately preceding the Fundamental Change
Repurchase Date, specifying:

               (1) the principal amount of the Notes with respect to which such notice of withdrawal is being
submitted;

               (2) the certificate numbers of the Definitive Notes, if any, in respect of which such notice
of withdrawal is being submitted; and

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               (3) the principal amount, if any, of such Notes that remain subject to the original
Fundamental Change Repurchase Notice and which have been or will be delivered for repurchase by the
Company.

               If the Notes with respect to which the notice of withdrawal is being submitted are not in
certificated form, the notice of withdrawal must comply with the Applicable Procedures.

          (h) The Trustee shall be under no obligation to ascertain the occurrence of a Fundamental
Change or to give notice to the Holders with respect thereto. The Trustee may conclusively assume,
in the absence of written notice to the contrary from the Company, that no Fundamental Change has
occurred.

ARTICLE IV

SUCCESSORS

     SECTION 4.1. Merger, Consolidation, or Sale of Assets.

     The Company shall not, directly or indirectly, consolidate or merge with or into any other
Person in a transaction in which the Company is not the surviving corporation or convey, transfer
or lease the properties and assets of the Company substantially as an entirety to any successor
Person, unless:

     (1) the successor Person, if any, is:

          (a) a corporation organized and existing under the laws of the United States, any state of the
United States, or the District of Columbia, and

          (b) such Person assumes the Company’s obligations on the Notes and under this Indenture
pursuant to agreements reasonably satisfactory in form and substance to the Trustee;

     (2) immediately after giving effect to the transaction, no Default or Event of Default will
have occurred and be continuing; and

     (3) the Company shall have delivered to the Trustee an Officers’ Certificate and an Opinion of
Counsel, each stating that such consolidation, merger, conveyance, transfer or lease and, if a
supplemental indenture is required in connection with such transaction, such supplemental
indenture, comply with this Article IV and that all conditions precedent herein provided for
relating to such transaction have been satisfied.

     This Section 4.1 will not apply to a merger of the Company with an Affiliate solely for the
purpose of reincorporating the Company in another jurisdiction.

     SECTION 4.2. Successor Corporation Substituted.

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     Upon any consolidation or merger, or any sale, assignment, transfer, lease, conveyance or
other disposition of all or substantially all of the properties or assets of the Company in a
transaction that is subject to, and that complies with the provisions of, Section 4.1 hereof, the
successor Person formed by such consolidation with or into which the Company is merged or to which
such sale, assignment, transfer, lease, conveyance or other disposition is made shall succeed to,
and be substituted for (so that from and after the date of such consolidation, merger, sale,
assignment, transfer, lease, conveyance or other disposition, the provisions of this Indenture
referring to the “Company” shall refer instead to the successor Person and not to the Company), and
may exercise every right and power of the Company under this Indenture with the same effect as if
such successor Person had been named as the Company herein; provided, however, that the predecessor
Company shall not be relieved from the obligation to pay the principal of and interest on the Notes
except in the case of a sale of all of the Company’s assets in a transaction that is subject to,
and that complies with the provisions of, Section 4.1 hereof.

ARTICLE V

REDEMPTION OF NOTES

     SECTION 5.1. No Optional Redemption.

     The Notes are not redeemable by the Company prior to Maturity.

ARTICLE VI

CONVERSION OF NOTES

     SECTION 6.1. Conversion Right and Conversion Rate.

          (a) Subject to and upon compliance with the provisions of this Article VI, at the option of
the Holder thereof, at any time prior to Maturity, unless earlier repurchased, any portion of the
principal amount of any Note that is an integral multiple of $1,000 (provided that the principal
amount of such security to remain outstanding after such conversion is equal to $2,000 or any
integral multiple of $1,000 in excess thereof) may be converted into fully paid and non-assessable
shares of Common Stock at the Conversion Rate, determined as hereinafter provided, in effect at the
time of conversion.

          (b) If any Holder has submitted Notes for repurchase upon a Fundamental Change in accordance
with Section 3.7 hereof, such Notes submitted for repurchase may be converted only if such Holder
withdraws the election for repurchase in accordance with Section 3.7(g) hereof.

          (c) Each $1,000 principal amount of notes converted into shares of Common Stock shall
initially will be converted at a Conversion Price of $38.1455 per share. The rate at which shares
of Common Stock shall be delivered upon conversion (herein called the “Conversion Rate”) shall be
initially 26.2154 shares of Common Stock for each $1,000 principal amount of Notes. The Conversion
Rate will be adjusted under the circumstances provided in Section 6.5. All calculations under this
Article shall be made to the nearest 1/10th cent or to the nearest 1/10,000ths of a share, as the
case may be.

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     SECTION 6.2. Conversion Consideration.

          (a) Upon surrendering any Notes for conversion, the Holder of such Notes shall receive, in
respect of each $1,000 principal amount of Notes, a number of shares of Common Stock equal to the
Applicable Conversion Rate.

          (b) When a Holder receives Common Stock upon conversion of Notes, such Holder will also
receive the associated rights under the Company’s stockholder rights plan adopted in 1997 related
to its Series A Junior Participating Preferred Stock Purchase Rights and any stockholder rights
plan that the Company may subsequently adopt, whether or not the rights have separated from the
Common Stock at the time of conversion unless, prior to conversion, the rights have expired,
terminated or been exchanged.

     SECTION 6.3. Exercise of Conversion Right.

          (a) In order to exercise the conversion right:

               (1) the Holder of any Definitive Note to be converted must: (i) complete and manually sign a
notice of conversion substantially in the form of Exhibit B hereto (the “Conversion Notice”); (ii)
deliver the Conversion Notice and the Definitive Note to the Conversion Agent; and (iii) if
required by the Company, the Trustee or the Conversion Agent, furnish appropriate endorsements and
transfer documents; or

               (2) the holder of beneficial interests in any Global Note to be converted must comply with the
Applicable Procedures to cause the beneficial interests in such Global Note to be delivered to the
Conversion Agent,

and in either case, the Holder of a Definitive Note or holder of beneficial interests in a Global
Note will, if required, pay all transfer or similar taxes that the Company is not otherwise
required to pay pursuant to Section 3.6 hereof and, if required pursuant to Section 6.3(b) hereof,
pay funds equal to the interest payable on the next Interest Payment Date.

     The date on which a Holder of a Definitive Note or holder of a beneficial interest in a Global
Note completes the requirements of this Section 6.3(a) shall be deemed to be the date of conversion
(the “Conversion Date”) for purposes of this Article VI. On and after the Conversion Date, the
conversion by such Holder or holder, as set forth in the Conversion Notice, shall become
irrevocable.

     The Company shall deliver shares of Common Stock (and any cash in lieu of fractional shares)
deliverable upon conversion to the Conversion Agent no later than the third Business Day following
the Conversion Date.

          (b) Each Definitive Note surrendered (in whole or in part), or beneficial interest in any
Global Note surrendered to the Conversion Agent, for conversion during a Record Date Period shall
be accompanied by payment by the Holder in same-day funds or other funds acceptable to the Company
of an amount equal to the interest payable on the applicable Interest Payment Date on the principal
amount of such Note (or part thereof, as the case may be) being surrendered for conversion;
provided, however, that no such payment by the Holder need be
made in the case of any Note or portion thereof that has been delivered for repurchase
following a Fundamental Change on a Fundamental Change Repurchase Date.

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The interest payable by
the Company on such Interest Payment Date with respect to any Note (or portion thereof, if
applicable) that is surrendered for conversion during a Record Date Period shall be paid to the
Holder of such Note as of such Regular Record Date in an amount equal to the interest that would
have been payable on such Note if such Note had been converted as of the close of business on the
applicable Interest Payment Date.

     Except as provided in this Section 6.3(b), no cash payment or adjustment shall be made upon
any conversion on account of any interest accrued from the Interest Payment Date immediately prior
to the Conversion Date, in respect of any Note (or part thereof, as the case may be) surrendered
for conversion, or on account of any dividends on the Common Stock issued upon conversion. The
Company’s delivery to the Holder of the number of shares of Common Stock (and cash in lieu of
fractions thereof in accordance with Section 6.4 hereof) into which a Note is convertible will be
deemed to satisfy all of the Company’s obligations to pay the principal of and interest, if any, on
the Note. Accordingly, accrued but unpaid interest, if any, will be deemed to be paid in full
rather than canceled, extinguished or forfeited.

          (c) Notes shall be deemed to have been converted immediately prior to the close of business on
the Conversion Date, and at such time the rights of the Holders of such Notes as Holders shall
cease, and the Person or Persons entitled to receive the shares of Common Stock issuable upon
conversion shall be treated for all purposes as the record holder or holders of such Common Stock
at such time. Following any Conversion Date, the Company shall satisfy its obligations with respect
to such conversion by either:

               (1) delivering to the Trustee, for delivery to the Holder (or such other Person as may be
named in the relevant Conversion Notice), certificates representing the number of shares of Common
Stock issuable upon such conversion; or

               (2) delivering to such Holder (or such other Person as may be named in the relevant Conversion
Notice) such number of shares of Common Stock issuable upon such conversion in accordance with the
Applicable Procedures,

in each case, together with payment in lieu of any fractional shares, if any, as provided in
Section 6.4 (such delivery of shares and cash payment, if any, the “Settlement”); provided that
shares of Common Stock only will be deliverable in certificated form if (i) the Holder exercising
such conversion has specifically requested in writing that delivery be in certificates or (ii) the
Company determines that delivery is required in certificated shares either because (A) delivery to
the Holder (or such other Person named in the relevant Conversion Notice) is not practicable in
accordance with the Applicable Procedures or (B) in the opinion of legal counsel, delivery is
required in certificated form in order to comply with the requirements of applicable securities
laws. Settlement shall occur promptly (but in no event more than three Business Days) following the
Conversion Date.

     (d) In the case of any Note that is converted in part only, upon such conversion the Company
shall execute and the Trustee shall authenticate and deliver to the Holder thereof, at the expense
of the Company, a new Note or Notes of authorized
denominations in an aggregate principal amount equal to the unconverted portion of the
principal amount of such Note.

29

 

     SECTION 6.4. Fractions of Shares.

     No fractional shares of Common Stock shall be issued upon conversion of any Note or Notes. If
more than one Note shall be surrendered for conversion at one time by the same Holder, the number
of full shares that shall be issuable upon conversion thereof shall be computed on the basis of the
aggregate principal amount of the Notes (or specified portions thereof) so surrendered. The number
of fractional shares to be paid, if any, will be valued by the Closing Sale Price of the Common
Stock on the Trading Day immediately preceding the Conversion Date. Instead of any fractional share
of Common Stock that would otherwise be issuable upon conversion of any Note or Notes (or specified
portions thereof), the Company shall calculate and pay a cash adjustment for the fractional amount
(calculated to the nearest 1/10,000th of a share) based upon the Closing Sale Price on the Trading
Day immediately preceding the Conversion Date.

     SECTION 6.5. Adjustment of Conversion Rate.

          (a) The Conversion Rate shall be subject to adjustment, without duplication, from time to time
upon the occurrence of any of the following:

               (1) Stock Dividends in Common Stock.

In case the Company shall pay or make a dividend or other distribution on shares of Common Stock
payable exclusively in shares of Common Stock, the Conversion Rate in effect at the opening of
business on the day following the date fixed for the determination of stockholders entitled to
receive such dividend or other distribution shall be increased by dividing such Conversion Rate by
an adjustment factor equal to a fraction of which the numerator shall be the number of shares of
Common Stock outstanding at the close of business on the date fixed for such determination and the
denominator shall be the sum of such number of shares and the total number of shares constituting
such dividend or other distribution, such increase to become effective immediately after the
opening of business on the day following the date fixed for such determination. If, after any such
date fixed for determination, any dividend or distribution is not in fact paid, the Conversion Rate
shall be immediately readjusted, effective as of the date the Company’s Board of Directors
determines not to pay such dividend or distribution, to the Conversion Rate that would have been in
effect if such determination date had not been fixed. For the purposes of this clause (1), the
number of shares of Common Stock at any time outstanding shall not include shares held in the
treasury of the Company. The Company will not pay any dividend or make any distribution on shares
of Common Stock held in the treasury of the Company.

               (2) Issuance of Rights or Warrants.

In case the Company shall issue rights or warrants to all or substantially all holders of its
Common Stock entitling them for a period expiring within 60 days from the date of issuance of the
rights or warrants to subscribe for or purchase shares of Common Stock at a price per share less
than the Current Market Price per share of Common Stock on the date fixed for the
determination of stockholders entitled to receive such rights or warrants (other than any rights or
warrants that (x) by their terms will also be issued to any Holder upon conversion of a Note into
shares of Common Stock without any action required by the Company or any other Person or (y) are
distributed to shareholders of the Company upon a merger or consolidation in compliance with
Section 6.8 hereof and taking into consideration in determining the price per share any
consideration received by the Company for such rights or warrants and any amount payable on
exercise or conversion thereof, with the value of such consideration, if other than cash, to be
determined by the Company), then the Conversion Rate in effect at the opening of business on the
day following the date fixed for such determination shall be increased by dividing such Conversion
Rate by an adjustment factor equal to a fraction:

30

 

                    (A) the numerator of which shall be the number of shares of Common Stock outstanding at the
close of business on the date fixed for such determination plus the number of shares of Common
Stock that the aggregate of the offering price of the total number of shares of Common Stock so
offered for subscription or purchase would purchase at such Current Market Price; and

                    (B) the denominator of which shall be the number of shares of Common Stock outstanding at the
close of business on the date fixed for such determination plus the number of shares of Common
Stock so offered for subscription or purchase,

such increase to become effective immediately after the opening of business on the day following
the date fixed for such determination. If, after any such date fixed for determination, any such
rights or warrants are not in fact issued, or are not exercised prior to the expiration thereof,
the Conversion Rate shall be immediately readjusted, effective as of the date such rights or
warrants expire, or the date the Company’s Board of Directors determines not to issue such rights
or warrants, to the Conversion Rate that would have been in effect if the unexercised rights or
warrants had never been granted or such determination date had not been fixed, as the case may be,
and as a result no additional shares are delivered or issued pursuant to such rights or warrants.
For the purposes of this clause (2), the number of shares of Common Stock at any time outstanding
shall not include shares held in the treasury of the Company. The Company will not issue any rights
or warrants in respect of shares of Common Stock held in the treasury of the Company.

               (3) Stock Splits and Combinations. (i) In case outstanding shares of Common Stock
shall be subdivided or split into a greater number of shares of Common Stock, then the Conversion
Rate in effect at the opening of business on the day following the day upon which such subdivision
or split becomes effective shall be proportionately increased; (ii) in case outstanding shares of
Common Stock shall be combined or reclassified into a smaller number of shares of Common Stock,
then the Conversion Rate in effect at the opening of business on the day following the day upon
which such combination or reclassification becomes effective shall be proportionately reduced; and
(iii) in case the Company issues any shares of its Capital Stock in a reclassification of the
outstanding shares of Common Stock, then the Conversion Rate in effect at the opening of business
on the day following the day upon which such reclassification becomes effective shall be
proportionately applied to the new class of shares of Capital Stock of the Company into which the
Common Stock was reclassified; in each case, such increase, reduction or reclassification, as the
case may be, to become effective immediately after the
opening of business on the Business Day following the day upon which such subdivision,
combination or reclassification becomes effective.

31

 

               (4) Distribution of Indebtedness, Securities or Assets. In case the Company shall, by
dividend or otherwise, distribute to all or substantially all holders of its Common Stock evidences
of its indebtedness, securities, assets or rights, options or warrants to purchase the Company’s
securities (provided that if these rights are only exercisable upon the occurrence of specified
triggering events, then the Conversion Rate will not be adjusted until the triggering events
occur), but excluding (i) any dividends or distributions referred to in clause (1) of this Section
6.5(a), (ii) any rights or warrants referred to in clause (2) of this Section 6.5(a), (iii) any
dividends or distributions paid exclusively in cash described in clause (6), (7) or (8) of this
Section 6.5(a) (the “Distributed Assets”), then (other than in the case as described in clause (5)
of this Section 6.5(a)) the Conversion Rate shall be adjusted so that the same shall equal the rate
determined by multiplying the Conversion Rate in effect immediately prior to the close of business
on the record date fixed for the determination of stockholders entitled to receive such
distribution by an adjustment factor equal to a fraction:

                    (A) the numerator of which shall be the Current Market Price per share of Common Stock; and

                    (B) the denominator of which shall be the Current Market Price per share of Common Stock on
the date fixed for such determination minus the Fair Market Value, as determined by the Company’s
Board of Directors, whose determination in good faith shall be conclusive and described in a Board
Resolution delivered to the Trustee and certified by the Secretary or an Assistant Secretary of the
Company, of the portion of those Distributed Assets applicable to one share of Common Stock, such
adjustment to become effective immediately after the record date fixed for the determination of
stockholders entitled to receive such distribution.

If after any such date fixed for determination, any such distribution is not in fact made, the
Conversion Rate shall be immediately readjusted, effective as of the date the Company’s Board of
Directors determines not to make such distribution, to the Conversion Rate that would have been in
effect if such determination date had not been fixed.

     Notwithstanding the foregoing, in cases where (i) the Fair Market Value per share of the
Distributed Assets equals or exceeds the Current Market Price of the Common Stock, or (ii) the
Current Market Price of the Common Stock exceeds the Fair Market Value per share of the Distributed
Assets by less than $1.00, in lieu of the adjustment set forth in this Section 6.5(a)(4), Holders
will receive upon conversion, in addition to shares of Common Stock, if any, the amount and type of
Distributed Assets such Holders would have received upon conversion of such Holders’ Notes if they
had been converted immediately prior to the record date for such distribution.

32

 

               (5) Spin-Offs. In case the Company shall distribute to all or substantially all
holders of its Common Stock shares of Capital Stock of any class or series, or similar Equity
Interests, of or relating to a Subsidiary or other business unit, which Capital Stock is or Equity
Interests are traded on the NYSE or another U.S. national securities exchange or
quoted on NASDAQ or another established automated over-the-counter trading market in the
United States (a “Spin-off”), then the Conversion Rate shall be adjusted so that the same shall
equal the rate determined by multiplying the Conversion Rate in effect immediately prior to the
close of business on the record date fixed for the determination of stockholders entitled to
receive such distribution by an adjustment factor equal to the sum of the Daily Adjustments for
each of the 10 consecutive Trading Days beginning on the effective date of the Spin-off, such
adjustment to become effective on the 10th Trading Day from, and including, the effective date of
the Spin-off.

               (6) Cash Distributions. In case the Company shall, by dividend or otherwise,
distribute to all or substantially all holders of outstanding shares of Common Stock distributions
consisting exclusively of cash, then the Conversion Rate shall be adjusted so that the same shall
equal the rate determined by multiplying the Conversion Rate in effect immediately prior to the
close of business on the date fixed for determination of the stockholders entitled to receive such
distribution by an adjustment factor equal to a fraction:

                    (A) the numerator of which shall be equal to the Current Market Price per share of Common
Stock on the date fixed for such determination; and

                    (B) the denominator of which shall be equal to the Current Market Price per share of Common
Stock on such date fixed for determination minus the amount per share of such distribution, such
adjustment to become effective immediately after the record date fixed for the determination of
stockholders entitled to receive such distribution.

     Notwithstanding the foregoing, in cases where (i) the per share amount of such distribution
equals or exceeds the Current Market Price of the Common Stock, or (ii) the Current Market Price of
the Common Stock exceeds the per share amount of such distribution by less than $1.00, in lieu of
the adjustment set forth in this Section 6.5(a)(6), Holders will receive upon conversion, in
addition to shares of Common Stock, if any, such distribution such Holders would have received upon
conversion of such Holders’ Notes if they had been converted immediately prior to the record date
for such distribution.

               (7) Tender or Exchange Offers. In case the Company or any Subsidiary shall make a
payment in respect of a tender offer or exchange offer for any portion of the Common Stock, in
which event, to the extent the cash and value of any other consideration included in the payment
per share of Common Stock exceeds the Closing Sale Price of the Common Stock on the Trading Day
immediately following the last date on which tenders or exchanges may be made pursuant to such
tender offer or exchange offer (the “Expiration Date”), as the case may be, then the Conversion
Rate shall be adjusted so that the same shall equal the rate determined by multiplying the
Conversion Rate immediately prior to close of business on the Expiration Date by an adjustment
factor equal to a fraction:

                    (A) the numerator of which shall be equal to the sum of (a) the Fair Market Value, as
determined by the Board of Directors of the Company, whose determination in good faith shall be
conclusive and described in a Board Resolution delivered to the Trustee and certified by the
Secretary of the Company of the aggregate consideration payable for all shares of Common Stock
purchased by the Company in the tender or exchange offer and
(b) the product of (i) the number of shares of Common Stock outstanding less any such
purchased shares and (ii) the Closing Sale Price of the Common Stock on the Trading Day immediately
following the Expiration Date; and

33

 

                    (B) the denominator of which shall be equal to the product of (a) the number of shares of
Common Stock outstanding, including any such purchased shares, and (b) the Closing Sale Price of
the Common Stock on the Trading Day immediately following the Expiration Date.

     The adjustment pursuant to this clause (7) will become effective immediately after the opening
of business on the second Trading Day immediately following the Expiration Date.

               (8) Repurchases. In case the Company or any of its Subsidiaries shall make a payment
in respect of a repurchase of Common Stock the consideration for which exceeds the average of the
Closing Sale Prices of the Common Stock for the five consecutive Trading Days ending on the
relevant repurchase date (such amount, the “Repurchase Premium”), and that repurchase, together
with any other repurchases of Common Stock by the Company or any of its Subsidiaries involving a
Repurchase Premium concluded within the preceding 12 months not triggering an adjustment to the
Conversion Rate, results in the payment by the Company of an aggregate consideration exceeding an
amount equal to 10% of the Market Capitalization of the Common Stock, then the Conversion Rate
shall be adjusted so that the same shall equal the rate determined by multiplying the Conversion
Rate immediately prior to the close of business on the date fixed for determination of the
stockholders entitled to receive such distribution by an adjustment factor equal to a fraction:

                    (A) the numerator of which shall be equal to the Current Market Price of the Common Stock; and

                    (B) the denominator of which shall be equal to (a) the Current Market Price of the Common
Stock minus (b) the quotient of (i) the aggregate amount of all the Repurchase Premiums paid in
connection with such repurchases and (ii) the number of shares of Common Stock outstanding on the
day immediately following the date of the repurchase triggering the adjustment, as determined by
the Board of Directors of the Company;

provided that no adjustment to the Conversion Rate shall be made to the extent the Conversion Rate
is not increased as a result of the above calculation; and provided, further, that the repurchases
of Common Stock effected by the Company or its agent in conformity with Rule 10b-18 under the
Exchange Act will not be included in any adjustment to the Conversion Rate made pursuant to this
Section 6.5(a)(8).

     If a payment by the Company shall cause an adjustment to the Conversion Rate under both clause
(7) and clause (8) of this Section 6.5(a), the provisions of Section 6.5(a)(8) shall control.

          (b) No Adjustment. For the avoidance of doubt, no adjustment in the Conversion Rate
shall be required:

34

 

               (1) upon the issuance of (A) any shares of Common Stock or (B) options, warrants or other
rights to acquire Common Stock (including the issuance of Common Stock pursuant to such options,
warrants or other rights), in any transaction resulting in an exchange for Fair Market Value,
including in connection with a reduction of indebtedness or liabilities of the Company or its
Subsidiaries including, without limitation, upon the conversion of convertible securities of the
Company outstanding on the date the Notes were issued or pursuant to settlements with respect to
claims related to any governmental or private litigation, dispute, investigation, proceeding or
other similar action;

               (2) upon the issuance of any shares of Common Stock pursuant to any present or future plan or
similar arrangement providing for the reinvestment of dividends or interest payable on the
Company’s securities and the investment of additional optional amounts in shares of Common Stock
under any such plan or arrangement;

               (3) upon the issuance of any shares of Common Stock or options or rights to purchase such
shares pursuant to any present or future employee, director or consultant benefit plan or program
or similar arrangement of, or assumed by, the Company or any of its Subsidiaries;

               (4) upon the issuance of any shares of Common Stock pursuant to any option, warrant, right or
exercisable, exchangeable or convertible security not described in clause (3) of this Section
6.5(b) and outstanding as of the date the Notes were first issued;

               (5) for a change in the par value of the Common Stock; or

               (6) for accrued and unpaid interest, if any.

     In addition, the Company will not be required to make an adjustment in the Conversion Rate
unless the adjustment would require a change of at least 1% in the Conversion Rate. The Company
shall carry forward any adjustment that is less than 1% of the Conversion Rate, take such
carried-forward adjustments into account in any subsequent adjustments, and make such
carried-forward adjustments, regardless of whether the aggregate adjustment is less than 1%, (a)
annually on the anniversary of the first date of issue of the Notes and (b) otherwise (1) five
Business Days prior to the Stated Maturity of the Notes or (2) prior to any Fundamental Change
Repurchase Date, unless such adjustment has already been made.

     No adjustment will be made to the Conversion Rate or a Holder’s ability to convert the Notes
if such Holder otherwise participates in a distribution without conversion.

          (c) Increase in Conversion Rate due to Taxes. The Company may make such increases in
the Conversion Rate, for the remaining term of the Notes or any shorter term, in addition to those
required by clause (a) of this Section 6.5, as the Board of Directors of the Company considers to
be advisable in order to avoid or diminish any income tax to any holders of shares of Common Stock
or rights to purchase Common Stock resulting from any dividend or distribution of stock or issuance
of rights or warrants to purchase or subscribe for stock or from any event treated as such for
income tax purposes. The Company shall have the power to resolve any ambiguity or correct any error
in this clause (c) and its actions in so doing shall, absent manifest error, be final and
conclusive.

35

 

          (d) Temporary Increase in Conversion Rate. To the extent permitted by applicable law,
the Company from time to time may increase the Conversion Rate by any amount for any period of time
if the period is at least twenty (20) Business Days, the increase is irrevocable during such
period, and the Company’s Board of Directors shall have made a determination that such increase
would be in the best interests of the Company, which determination shall be conclusive; provided,
however, that no such increase shall be taken into account for purposes of determining whether the
closing price of the Common Stock equals or exceeds 105% of the Conversion Price in connection with
an event which would otherwise be a Fundamental Change. Whenever the Conversion Rate is increased
pursuant to the preceding sentence, the Company shall give notice of the increase to the Holders in
the manner provided in Section 11.2, with a copy to the Trustee and Conversion Agent, at least
fifteen (15) days prior to the date the increased Conversion Rate takes effect, and such notice
shall state the increased Conversion Rate and the period during which it will be in effect.

          (e) Fundamental Change Make-Whole Adjustment. In case of a Fundamental Change as
specified in clauses (2), (3) or (4) of the definition thereof, solely upon receipt by the
Conversion Agent of any Holder’s Conversion Notice on or after the Effective Date of the
Fundamental Change and prior to the 45th day following such Effective Date (or, if earlier and to
the extent applicable, the close of business on the second Business Day immediately preceding the
Fundamental Change Repurchase Date (as specified in the Fundamental Change Repurchase Right
Notice)), the Company shall increase the Conversion Rate for the Notes surrendered for conversion
by such Holder by the number of Additional Shares determined in accordance with this Section
6.5(e); provided, however, that no increase shall be made in the case of a Fundamental Change if at
least 90% of the consideration paid for the Common Stock (excluding cash payments for fractional
shares and cash payments made pursuant to dissenters’ appraisal rights) in such Fundamental Change
transaction consists of shares of Capital Stock traded on NYSE or another U.S. national securities
exchange or quoted on NASDAQ or another established automated over-the-counter trading market in
the United States (or that will be so traded or quoted immediately following the transaction) and
as a result of such transaction or transactions the Notes become convertible solely into such
common stock. The number of Additional Shares will be determined by reference to the table below.

     The following table sets forth the number of Additional Shares issuable per $1,000 initial
principal amount of Notes as a result of a Fundamental Change that occurs in the corresponding
period:

	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 
	 	 	Stock Price
	Effective Date	 	$33.17	 	$37	 	$41	 	$45	 	$50	 	$55	 	$60	 	$70	 	$80
	June 5, 2007
	 	 	3.93	 	 	 	3.20	 	 	 	2.55	 	 	 	2.06	 	 	 	1.59	 	 	 	1.24	 	 	 	0.98	 	 	 	0.61	 	 	 	0.38	 
	June 15, 2008
	 	 	3.93	 	 	 	3.35	 	 	 	2.66	 	 	 	2.14	 	 	 	1.65	 	 	 	1.28	 	 	 	1.01	 	 	 	0.63	 	 	 	0.39	 
	June 15, 2009
	 	 	3.93	 	 	 	3.49	 	 	 	2.76	 	 	 	2.21	 	 	 	1.69	 	 	 	1.31	 	 	 	1.02	 	 	 	0.63	 	 	 	0.39	 
	June 15, 2010
	 	 	3.93	 	 	 	3.63	 	 	 	2.85	 	 	 	2.26	 	 	 	1.72	 	 	 	1.32	 	 	 	1.02	 	 	 	0.62	 	 	 	0.38	 
	June 15, 2011
	 	 	3.93	 	 	 	3.74	 	 	 	2.91	 	 	 	2.29	 	 	 	1.72	 	 	 	1.30	 	 	 	1.00	 	 	 	0.59	 	 	 	0.35	 
	June 15, 2012
	 	 	3.93	 	 	 	3.82	 	 	 	2.93	 	 	 	2.28	 	 	 	1.68	 	 	 	1.26	 	 	 	0.95	 	 	 	0.54	 	 	 	0.31	 
	June 15, 2013
	 	 	3.93	 	 	 	3.85	 	 	 	2.90	 	 	 	2.21	 	 	 	1.60	 	 	 	1.16	 	 	 	0.86	 	 	 	0.47	 	 	 	0.25	 
	June 15, 2014
	 	 	3.93	 	 	 	3.79	 	 	 	2.77	 	 	 	2.05	 	 	 	1.43	 	 	 	1.00	 	 	 	0.71	 	 	 	0.36	 	 	 	0.17	 
	June 15, 2015
	 	 	3.93	 	 	 	3.56	 	 	 	2.48	 	 	 	1.74	 	 	 	1.13	 	 	 	0.74	 	 	 	0.48	 	 	 	0.20	 	 	 	0.08	 
	June 15, 2016
	 	 	3.93	 	 	 	2.99	 	 	 	1.85	 	 	 	1.13	 	 	 	0.60	 	 	 	0.32	 	 	 	0.17	 	 	 	0.04	 	 	 	0.00	 
	June 15, 2017
	 	 	0.00	 	 	 	0.00	 	 	 	0.00	 	 	 	0.00	 	 	 	0.00	 	 	 	0.00	 	 	 	0.00	 	 	 	0.00	 	 	 	0.00	 

36

 

The Stock Prices and Additional Share amounts set forth above are based upon an initial
Conversion Price of $38.1455. The Stock Prices set forth in the first row of the table above shall
be adjusted as of any date on which the Conversion Rate of the Notes is adjusted in accordance with
Section 6.5 hereof. The adjusted Stock Prices shall equal the Stock Prices applicable immediately
prior to such adjustment, multiplied by an adjustment factor equal to a fraction, the numerator of
which is the Conversion Rate immediately prior to the adjustment giving rise to the Stock Price
adjustment and the denominator of which is the Conversion Rate as so adjusted. The number of
Additional Shares shall be adjusted in the same manner and for the same events as the Conversion
Rate as set forth in Section 6.5 hereof.

The exact Stock Price and Conversion Dates may not be set forth on the table; in which case, if:

               (A) the Stock Price is between two Stock Price amounts on the table or the Conversion Date is
between two dates on the table, the number of Additional Shares will be determined by straight-line
interpolation between the number of Additional Shares set forth for the higher and lower stock
price amounts and the two dates, as applicable, based on a 365-day year;

               (B) the Stock Price is more than $125.00 per share (subject to adjustment), no further
adjustment will be made to the Conversion Rate as a result of the Fundamental Change; and

               (C) the Stock Price is less than $33.17 per share (subject to adjustment), no further
adjustment will be made to the Conversion Rate as a result of the Fundamental Change.

     Notwithstanding the foregoing, in no event shall the total number of shares of Common Stock
issuable upon conversion of a Note exceed 30.1477 per $1,000 initial principal amount of the Notes,
subject to proportional adjustment in the same manner as the Conversion Rate as set forth in
Section 6.5(a) hereof.

     SECTION 6.6. Notice of Adjustments of Conversion Rate.

     Whenever the Conversion Rate is adjusted pursuant to Section 6.5 hereof:

          (a) the Company shall compute the adjusted Conversion Rate in accordance with Section 6.5
hereof and shall prepare an Officer’s Certificate setting forth (1) the adjusted Conversion Rate,
(2) the clause of Section 6.5 pursuant to which such adjustment has been made, showing in
reasonable detail the facts upon which such adjustment is based, (3) the calculation of such
adjustment and (4) the date as of which such adjustment is effective, and such certificate shall
promptly be delivered to the Trustee and each Conversion Agent (which such certificates shall be
conclusive absent manifest error); and

          (b) upon each such adjustment, a notice stating that the Conversion Rate has been adjusted and
setting forth the adjusted Conversion Rate shall be required, and as soon as practicable after it
is required, such notice shall be provided by the Company to all Holders in accordance with Section
11.2.

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     Neither the Trustee nor any Conversion Agent shall be under any duty or responsibility with
respect to any such certificate or the information and calculations contained therein, except to
exhibit the same to any Holder of Notes desiring inspection thereof at its office during normal
business hours.

     SECTION 6.7. Cancellation of Converted Notes.

     All Definitive Notes delivered for conversion shall be delivered to the Conversion Agent or
its agent to be canceled by or at the direction of the Trustee, which shall dispose of the same as
provided in this Indenture. Upon conversions of beneficial interests in any Global Note, the
Trustee or the Notes Custodian, at the direction of the Trustee, shall reduce the aggregate
principal amount of outstanding Notes represented by such Global Note to reflect the conversion
pursuant to Section 2.1(b).

     SECTION 6.8. Provision in Case of Consolidation, Merger or Sale of Assets.

     In the case of any consolidation or merger of the Company with or into any other Person, any
merger of another Person with or into the Company (other than a merger that does not result in any
reclassification, conversion, exchange or cancellation of outstanding shares of Common Stock of the
Company) or any conveyance, sale or transfer of all or substantially all of the assets of the
Company, the Person formed by such consolidation or resulting from such merger or which acquires
such assets, as the case may be, shall execute and deliver to the Trustee a supplemental indenture
providing that the Holder of each Note then outstanding shall have the right thereafter, during the
period such Note shall be convertible as specified in Section 6.1 to convert such Note only into
the kind and amount of securities, cash and other property receivable upon such consolidation,
merger, conveyance, sale or transfer by a holder of the number of shares of Common Stock of the
Company into which such Note might have been converted immediately prior to such consolidation,
merger, conveyance, sale or transfer. For purposes of this Section 6.8, the kind and amount of
consideration that a Holder would have been entitled to receive as a Holder of the Common Stock in
the case of reclassifications, consolidations, mergers, sales or transfers of assets or other
transactions that cause the Common Stock to be converted into the right to receive more than a
single type of consideration (determined based in part upon any form of stockholder election) will
be deemed to be the weighted average of the kind and amount of consideration received by the
Holders of the Common Stock that affirmatively make such an election. The above provisions of this
Section 6.8 shall similarly apply to successive consolidations, mergers, conveyances, sales,
transfers or leases. Notice of the execution of such a supplemental indenture shall be given by the
Company to the Holder of each Note as provided in Section 11.2 promptly upon such execution.

     Neither the Trustee nor any Conversion Agent shall be under any responsibility to determine
the correctness of any provisions contained in any such supplemental indenture relating either to
the kind or amount of shares of stock or other securities or property or cash receivable by Holders
of Notes upon the conversion of their Notes after any such consolidation, merger, conveyance,
transfer, sale or lease or to any such adjustment, but may accept as conclusive evidence of the
correctness of any such provisions, and shall be protected in relying upon, an Officers’
Certificate and an Opinion of Counsel with respect thereto, which the Company shall cause to be
furnished to the Trustee.

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     SECTION 6.9. Rights Issued in Respect of Common Stock.

     Rights or warrants distributed by the Company to all holders of Common Stock entitling the
holders thereof to subscribe for or purchase shares of the Company’s Capital Stock (either
initially or under certain circumstances), which rights or warrants, until the occurrence of a
specified event or events (“Trigger Event”):

	 	(1)	 	are deemed to be transferred with such shares of Common Stock;
	 
	 	(2)	 	are not exercisable; and
	 
	 	(3)	 	are also issued in respect of future issuances of Common Stock,

shall not be deemed distributed for purposes of Section 6.5(a) until the occurrence of the earliest
Trigger Event. In addition, in the event of any distribution of rights or warrants, or any Trigger
Event with respect thereto, that shall have resulted in an adjustment to the Conversion Rate under
Section 6.5(a), (A) in the case of any such rights or warrants that shall all have been redeemed or
repurchased without exercise by any holders thereof, the Conversion Rate shall be readjusted upon
such final redemption or repurchase to give effect to such distribution or Trigger Event, as the
case may be, as though it were a cash distribution, equal to the per share redemption or repurchase
price received by a holder of Common Stock with respect to such rights or warrants (assuming such
holder had retained such rights or warrants), made to all holders of Common Stock as of the date of
such redemption or repurchase, and (B) in the case of any such rights or warrants all of which
shall have expired without exercise by any holder thereof, the Conversion Price shall be readjusted
as if such issuance had not occurred.

     SECTION 6.10. Responsibility of Trustee and Conversion Agent for Conversion
Provisions.

     The Trustee and any Conversion Agent shall not at any time be under any duty or responsibility
to any Holder of Notes to determine whether any facts exist which may require any adjustment of the
Conversion Rate, or with respect to the nature or extent of any such adjustment when made, or with
respect to the method employed, herein or in any supplemental indenture provided to be employed, in
making the same, or whether a supplemental indenture need be entered into. Neither the Trustee nor
any Conversion Agent shall be accountable with respect to the validity or value (or the kind or
amount) of any Common Stock, or of any other securities or property or cash, which may at any time
be issued or delivered upon the conversion of any Note; and it or they do not make any
representation with respect thereto. Neither the Trustee nor any Conversion Agent shall be
responsible for any failure of the Company to make or calculate any cash payment or to issue,
transfer or deliver any shares of Common Stock or share certificates or other securities or
property or cash upon the surrender of any Note for the purpose of conversion; and the Trustee and
any Conversion Agent shall not be responsible for any failure of the Company to comply with any of
the covenants of the Company contained in this Article VI.

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ARTICLE VII

DEFAULTS AND REMEDIES

     SECTION 7.1. Events of Default.

     Each of the following is an “Event of Default”:

     (1) a default in the payment of any installment of interest upon any of the Notes as and when
the same shall become due and payable, and continuance of such default for a period of 30 days;

     (2) a default in the payment of all or any part of the principal of any of the Notes as and
when the same shall become due and payable at Maturity;

     (3) a default on the part of the Company in the performance, or breach by the Company, of any
other covenant or agreement on the part of the Company set forth in, or deemed to be incorporated
by reference to the Trust Indenture Act into, the Notes or in this Indenture (other than a covenant
or agreement in respect of which a default or breach by the Company is specifically dealt with in
this Section 7.1), and continuance of such default or breach without cure or waiver for a period of
90 days after there has been given, by registered or certified mail, to the Company by the Trustee,
or to the Company and the Trustee by the Holders of at least 25% in principal amount of the Notes
at the time Outstanding, a written notice specifying such failure and requiring the same to be
remedied;

     (4) the Company fails to pay the purchase price of any Note when due (including, without
limitation, on any Fundamental Change Repurchase Date);

     (5) the Company fails to deliver shares of Common Stock and any cash in lieu of fractional
shares upon conversion of Notes within the time period required by this Indenture;

     (6) the Company fails to timely provide the Fundamental Change Repurchase Right Notice, if
required by this Indenture, if such failure continues for 30 days after notice to the Company of
its failure to do so;

     (7) any indebtedness for money borrowed by the Company or any of its Subsidiaries (all or
substantially all of the outstanding voting securities of which are owned, directly, or indirectly,
by the Company) in an aggregate outstanding principal amount in excess of $25.0 million is not paid
at final maturity or upon acceleration and such indebtedness is not discharged, or such
acceleration is not cured or rescinded, within 10 days after written notice specifying such failure
and requiring the same to be remedied;

     (8) a failure by the Company or any of its Subsidiaries (all or substantially all of the
outstanding voting securities of which are owned, directly, or indirectly, by the Company) to pay
final and non-appealable judgments entered by a court or courts of competent jurisdiction, the
aggregate uninsured or unbonded portion of which is at least $25.0 million, if the judgments are
not paid, discharged or stayed within 60 days;

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     (9) the Company or any of its Subsidiaries pursuant to or within the meaning of Bankruptcy
Law:

                    (A) commences a voluntary case,

                    (B) consents to the entry of an order for relief against it in an involuntary case,

                    (C) consents to the appointment of a custodian of it or for all or substantially all of its
property, or

                    (D) makes a general assignment for the benefit of its creditors; and

     (10) a court of competent jurisdiction enters an order or decree under any Bankruptcy Law
that:

               (A) is for relief against the Company or any of its Subsidiaries in an involuntary case;

               (B) appoints a custodian of the Company or any of its Subsidiaries or for all or substantially
all of the property of the Company or any of its Subsidiaries; or

               (C) orders the liquidation of the Company or any of its Subsidiaries

and the order or decree remains unstayed and in effect for 60 consecutive days.

Notwithstanding the foregoing, at the election of the Company, for the first 90 days after the
occurrence of an Event of Default specified in Section 7.1(3) relating to any failure by the
Company to comply with the requirements of Section 314(a)(1) of the TIA, the remedy for such an
Event of Default shall consist exclusively of the right to receive an extension fee on the Notes at
an annual rate equal to 0.25% of the principal amount of the Notes. In the event that the Company
does not elect to pay the extension fee upon an Event of Default in accordance with this paragraph,
the Notes will be subject to acceleration as provided herein. The extension fee will accrue on all
outstanding Notes from and including the date on which an Event of Default relating to a failure to
comply with the requirements of Section 314(a)(1) of the TIA first occurs up to but not including
the 90th day thereafter (or such earlier date on which the Event of Default relating to such
obligations shall have been cured or waived pursuant to Section 7.4). On such 90th day (or earlier,
if such Event of Default is cured or waived pursuant to Section 7.4 prior to such 90th day), such
extension fee will cease to accrue and shall become due and payable and, if such Event of Default
has not been cured or waived pursuant to Section 7.4 prior to such 90th day, then the Trustee or
the holders of not less than 25% in principal amount of the Notes may declare the principal of and
accrued and unpaid interest on all such Notes to be due and payable immediately. This provision
shall not affect the rights of Holders in the event of the occurrence of any other Event of
Default. If the Company elects to pay the extension fee in accordance with this paragraph, the
Company shall notify, in the manner provided for in Section 11.2, the Holders and the Trustee of
such election at any time on or before the close of business on the date on which such Event of
Default first occurs. If the extension fee is payable under this Section 7.1, the Company shall
deliver to the Trustee an Officers’ Certificate to that effect stating the date on
which the extension fee is payable. Unless and until a Responsible Officer receives at the
Corporate Trust Office such a certificate, the Trustee may assume without inquiry that no extension
fee is payable. If the extension fee has been paid by the Company directly to the Persons entitled
to such fee, the Company shall deliver to the Trustee an Officer’s Certificate setting forth the
particulars of such payment.

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     SECTION 7.2. Acceleration.

     (1) In the case of an Event of Default specified in clause (9) or (10) of Section 7.1 hereof
with respect to the Company, all outstanding Notes will become due and payable immediately without
further action or notice by the Trustee or any Holder. Subject to Section 7.1, if any other Event
of Default occurs and is continuing, the Trustee or the Holders of at least 25% in aggregate
principal amount of the then outstanding Notes may declare all the Notes to be due and payable
immediately. Upon any such declaration, the Notes shall become due and payable immediately.

     (2) Notwithstanding the foregoing, if an Event of Default specified in clause (7) of Section
7.1 occurs resulting in a declaration of acceleration of the Notes, such declaration of
acceleration shall be automatically annulled if such Event of Default triggering such declaration
of acceleration pursuant to clause (7) of Section 7.1 shall have been remedied or cured by the
Company or any of its Subsidiaries or waived by the holders of the relevant indebtedness within 60
days of the declaration of acceleration with respect thereto and if (i) the annulment of the
acceleration of the Notes would not conflict with any judgment or decree of a court of competent
jurisdiction and (ii) all existing Events of Default, except nonpayment of principal or interest on
the Notes that became due and payable solely because of the acceleration of the Notes, have been
cured or waived.

     (3) At any time after a declaration of acceleration with respect to the Notes as described in
this Section 7.2, the Holders of a majority in aggregate principal amount of the outstanding Notes
may rescind and cancel such declaration and its consequences: (i) if the rescission would not
conflict with any judgment or decree of a court of competent jurisdiction; (ii) if all existing
Events of Default have been cured or waived except nonpayment of principal or interest that has
become due solely because of the acceleration; (iii) to the extent the payment of such interest is
lawful, interest on overdue installments of interest and overdue principal, which has become due
otherwise than by such declaration of acceleration, has been paid; and (iv) if the Company has paid
the Trustee its reasonable compensation and reimbursed the Trustee for its expenses, disbursements
and advances (including, but not limited to, reasonable attorneys’ fees and expenses). No such
rescission shall affect any subsequent Default or impair any right consequent thereto.

     SECTION 7.3. Other Remedies.

     If an Event of Default occurs and is continuing, the Trustee may pursue any available remedy
to collect the payment of principal and interest on the Notes or to enforce the performance of any
provision of the Notes or this Indenture.

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     The Trustee may maintain a proceeding even if it does not possess any of the Notes or does not
produce any of them in the proceeding. A delay or omission by the Trustee or any Holder of a Note
in exercising any right or remedy accruing upon an Event of Default shall not impair the right or
remedy or constitute a waiver of or acquiescence in the Event of Default. All remedies are
cumulative to the extent permitted by law.

     SECTION 7.4. Waiver of Past Defaults.

     Holders of not less than a majority in aggregate principal amount of the then outstanding
Notes by notice to the Trustee may on behalf of the Holders of all of the Notes waive an existing
Default and its consequences hereunder, except a continuing Default in:

          (a) the payment of the principal of, or interest on, the Notes (including in connection with
an offer to purchase); provided, however, that the Holders of a majority in aggregate principal
amount of the then outstanding Notes may rescind an acceleration and its consequences, including
any related payment default that resulted from such acceleration, in accordance with Section 7.2;

          (b) the conversion of any Note into shares of Common Stock in accordance with the provisions
of such Note and this Indenture; or

          (c) compliance with any of the provisions of this Indenture that would require the consent of
the Holder of each outstanding Note affected thereby.

Upon any such waiver, such Default shall cease to exist, and any Event of Default arising therefrom
shall be deemed to have been cured for every purpose of this Indenture; but no such waiver shall
extend to any subsequent or other Default or impair any right consequent thereon.

     SECTION 7.5. Control by Majority.

     Holders of a majority in aggregate principal amount of the then outstanding Notes may direct
the time, method and place of conducting any proceeding for exercising any remedy available to the
Trustee or exercising any trust or power conferred on it. However, the Trustee may refuse to follow
any direction that conflicts with law or this Indenture that the Trustee determines may be unduly
prejudicial to the rights of other Holders of Notes or that may involve the Trustee in personal
liability.

     SECTION 7.6. Limitation on Suits.

     A Holder may pursue a remedy with respect to this Indenture or the Notes only if:

          (a) such Holder gives to the Trustee written notice that an Event of Default is continuing;

          (b) Holders of at least 25% in aggregate principal amount of the then outstanding Notes make a
written request to the Trustee to pursue the remedy as Trustee;

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          (c) such Holder or Holders offer and, if requested, provide to the Trustee security or
indemnity reasonably satisfactory to the Trustee against any loss, liability or expense;

          (d) the Trustee does not comply with the request within 60 days after receipt of the request
and the offer of security or indemnity; and

          (e) during such 60-day period, Holders of a majority in aggregate principal amount of the then
outstanding Notes do not give the Trustee a direction inconsistent with such request.

          A Holder of a Note may not use this Indenture to prejudice the rights of another Holder of a
Note or to obtain a preference or priority over another Holder of a Note.

     SECTION 7.7. Rights of Holders of Notes To Receive Payment or Effect Conversion.

     Notwithstanding any other provision of this Indenture, the right of any Holder of a Note to
receive payment of principal and interest on the Note, on or after the respective due dates
expressed in the Note (including in connection with an offer to purchase), or to bring suit for the
enforcement of any such payment on or after such respective dates or the right to convert Notes in
accordance with Article VI of this Indenture, shall not be impaired or affected without the consent
of such Holder.

     SECTION 7.8. Collection Suit by Trustee.

     If an Event of Default specified in Section 7.1(1) or (2) hereof occurs and is continuing, the
Trustee is authorized to recover judgment in its own name and as trustee of an express trust
against the Company, and to enforce such judgment and collect the moneys adjudicated or decreed to
be payable, for the whole amount of principal of and interest remaining unpaid on the Notes,
interest on overdue principal and, to the extent lawful, interest and such further amount as shall
be sufficient to cover the costs and expenses of collection, including the reasonable compensation,
expenses, disbursements and advances of the Trustee, its agents and counsel.

     SECTION 7.9. Trustee May File Proofs of Claim.

     The Trustee is authorized to file such proofs of claim and other papers or documents as may be
necessary or advisable in order to have the claims of the Trustee (including any claim for the
reasonable compensation, expenses, disbursements and advances of the Trustee, its agents and
counsel) and the Holders of the Notes allowed in any judicial proceedings relative to the Company
(or any other obligor upon the Notes), its creditors or its property and shall be entitled and
empowered to collect, receive and distribute any money or other property payable or deliverable on
any such claims and any custodian in any such judicial proceeding is hereby authorized by each
Holder to make such payments to the Trustee, and in the event that the Trustee shall consent to the
making of such payments directly to the Holders, to pay to the Trustee any amount due to it for the
reasonable compensation, expenses, disbursements and advances of the Trustee, its agents and
counsel, and any other amounts due the Trustee under Section 8.7. To the extent that the payment of
any such compensation, expenses, disbursements and advances of the Trustee, its agents and counsel,
and any other amounts due the Trustee under Section 8.7 out of the estate in any such proceeding,
shall be denied for any reason, payment of
the same shall be secured by a Lien on, and shall be paid out of, any and all distributions,
dividends, money, securities and other properties that the Holders may be entitled to receive in
such proceeding whether in liquidation or under any plan of reorganization or arrangement or
otherwise. Nothing herein contained shall be deemed to authorize the Trustee to authorize or
consent to or accept or adopt on behalf of any Holder any plan of reorganization, arrangement,
adjustment or composition affecting the Notes or the rights of any Holder, or to authorize the
Trustee to vote in respect of the claim of any Holder in any such proceeding.

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     SECTION 7.10. Priorities.

     If the Trustee collects any money pursuant to this Article VII, it shall pay out the money in
the following order:

     First: to the Trustee (or any predecessor Trustee), its agents and attorneys for amounts due
under Section 8.7, including payment of all compensation, expenses and liabilities incurred, and
all advances made, by the Trustee and the costs and expenses of collection;

     Second: to Holders of Notes for amounts due and unpaid on the Notes for principal and
interest, ratably, without preference or priority of any kind, according to the amounts due and
payable on the Notes for principal and interest, respectively; and

     Third: to the Company or such party as a court of competent jurisdiction shall direct.

     The Trustee may fix a record date and payment date for any payment to Holders of Notes
pursuant to this Section 7.10. If a record date is fixed, the Trustee shall send, by first class
mail, electronically or by any other means approved by the Trustee to the Holders of the Notes of
record a notice at least 30 days but not more than 60 days before the payment date. Such notice
shall state: (1) that a payment is being made pursuant to this Section 7.10, (2) the relevant
Default and the circumstances giving rise to the collection of money pursuant to this Section 7.10,
(3) the payment date and (4) the amount of such payment per $1,000 of Notes.

     SECTION 7.11. Undertaking for Costs.

     All parties to this Indenture agree, and each Holder of any Note by his acceptance thereof
shall be deemed to have agreed, in any suit for the enforcement of any right or remedy under this
Indenture or in any suit against the Trustee for any action taken or omitted by it as a Trustee, a
court in its discretion may require the filing by any party litigant in the suit of an undertaking
to pay the costs of the suit, and the court in its discretion may assess reasonable costs,
including reasonable attorneys’ fees, against any party litigant in the suit, having due regard to
the merits and good faith of the claims or defenses made by the party litigant. This Section 7.11
does not apply to a suit by the Trustee, a suit by a Holder of a Note pursuant to Section 7.6
hereof, or a suit by Holders of more than 10% in aggregate principal amount of the then outstanding
Notes.

ARTICLE VIII

TRUSTEE

     SECTION 8.1. Duties of Trustee.

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          (a) If an Event of Default has occurred and is continuing, the Trustee shall exercise the
rights and powers vested in it by this Indenture and use the same degree of care and skill in its
exercise as a prudent Person would exercise or use under the circumstances in the conduct of such
Person’s own affairs; provided, to the extent permitted by the TIA, that if an Event of Default
occurs and is continuing, the Trustee will be under no obligation to exercise any of the rights or
powers under this Indenture at the request or direction of any of the Holders unless such Holders
have provided the Trustee indemnity or security reasonably satisfactory to the Trustee against
loss, liability or expense.

          (b) Except during the continuance of an Event of Default:

               (i) the Trustee undertakes to perform such duties and only such duties as are specifically set
forth in this Indenture and no implied covenants or obligations shall be read into this Indenture
against the Trustee; and

               (ii) in the absence of bad faith on its part, the Trustee may conclusively rely, as to the
truth of the statements and the correctness of the opinions expressed therein, upon certificates,
directions, notices or opinions furnished to the Trustee and conforming to the requirements of the
Indenture. However, in the case of any such certificates, directions, notices or opinions which by
any provisions hereof are specifically required to be furnished to the Trustee, the Trustee shall
examine such certificates and opinions to determine whether or not they conform to the requirements
of this Indenture (but need not confirm or investigate the accuracy of mathematical calculations or
other facts stated therein).

          (c) The Trustee may not be relieved from liability for its own negligent action, its own
negligent failure to act or its own willful misconduct, except that:

               (i) this paragraph does not limit the effect of paragraph (b) of this Section;

               (ii) the Trustee shall not be liable for any error of judgment made in good faith by a
Responsible Officer unless it is proved that the Trustee was negligent in ascertaining the
pertinent facts; and

               (iii) the Trustee shall not be liable with respect to any action it takes or omits to take in
good faith in accordance with a direction received by it pursuant to Section 7.5.

          (d) The Trustee shall not be liable for interest on any money received by it except as the
Trustee may agree in writing with the Company.

          (e) Money held in trust by the Trustee need not be segregated from other funds except to the
extent required by law.

          (f) No provision of this Indenture shall require the Trustee to expend or risk its own funds
or otherwise incur any financial liability in the performance of any of its duties hereunder or in
the exercise of any of its rights or powers, if it shall have reasonable grounds to believe that
repayment of such funds or adequate indemnity against such risk or liability is not reasonably
assured to it.

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          (g) Every provision of this Indenture relating to the conduct or affecting the liability of or
affording protection to the Trustee shall be subject to the provisions of this Section 8.1 and to
the provisions of the TIA.

          (h) The Trustee shall be under no obligation to exercise any of the rights or powers vested in
it by this Indenture at the request or direction of any of the Holders unless such Holders shall
have provided to the Trustee security or indemnity reasonably satisfactory to it against the costs,
expenses (including reasonable attorneys’ fees and expenses) and liabilities that might be incurred
by it in compliance with such request or direction.

     SECTION 8.2. Rights of Trustee.

          (a) The Trustee may conclusively rely and shall be protected in acting or refraining from
acting upon any paper or document believed by it to be genuine and to have been signed or presented
by the proper Person or Persons. The Trustee need not investigate any fact or matter stated in the
document.

          (b) Before the Trustee acts or refrains from acting, it may require an Officers’ Certificate
or an Opinion of Counsel. The Trustee shall not be liable for any action it takes or omits to take
in good faith in reliance on the Officers’ Certificate or Opinion of Counsel.

          (c) The Trustee may act through its attorneys and agents and shall not be responsible for the
misconduct or negligence of any attorney or agent appointed with due care.

          (d) The Trustee shall not be liable for any action it takes or omits to take in good faith
which it believes to be authorized or within its rights or powers; provided, however, that the
Trustee’s conduct does not constitute willful misconduct or negligence.

          (e) The Trustee may consult with counsel of its selection, and the advice or opinion of such
counsel appointed with due care with respect to legal matters relating to this Indenture and the
Notes shall be full and complete authorization and protection from liability in respect to any
action taken, omitted or suffered by it hereunder in good faith and in accordance with the advice
or opinion of such counsel.

          (f) The Trustee shall not be bound to make any investigation into the facts or matters stated
in any resolution, certificate, statement, instrument, opinion, notice, request, direction,
consent, order, bond or other paper or document; but the Trustee, in its discretion, may make such
further inquiry or investigation into such facts or matters as it may see fit and, if the Trustee
shall determine to make such further inquiry or investigation, it shall be entitled to examine the
books, records and premises of the Company at reasonable times, in a reasonable manner and upon
reasonable advance notice, personally or by agent or attorney at the sole cost of the Company and
shall incur no liability or additional liability of any kind by reason of such inquiry or
investigation.

          (g) The Trustee shall not be deemed to have knowledge of any Default or Event of Default
except, (i) during any period it is serving as Registrar and Paying Agent for the Notes, any Event
of Default occurring pursuant to Sections 7.1(1), 7.1(2), 7.1(4) or 7.1(5)or (ii) any Default or
Event of Default of which a Responsible Officer shall have received written
notification or obtained actual knowledge. The term “actual knowledge” shall mean the actual
fact or statement of knowing by a Responsible Officer without independent investigation with
respect thereto.

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          (h) Delivery of the reports, information and documents to the Trustee is for informational
purposes only and the Trustee’s receipt of such shall not constitute constructive notice of any
information contained therein or determinable from information contained therein, including the
Company’s compliance with any of its covenants hereunder (as to which the Trustee is entitled to
rely exclusively on Officers’ Certificates).

          (i) In no event shall the Trustee be responsible or liable for special, indirect, or
consequential loss or damage of any kind whatsoever (including, but not limited to, loss of profit)
irrespective of whether the Trustee has been advised of the likelihood of such loss or damage and
regardless of the form of action.

          (j) The rights, privileges, protections, immunities and benefits given to the Trustee,
including its right to be indemnified, are extended to, and shall be enforceable by, the Trustee in
each of its capacities hereunder, and each agent, custodian and other Person employed to act
hereunder.

          (k) The Trustee may request that the Company deliver an Officers’ Certificate setting forth
the names of individuals and/or titles of officers authorized at such time to take specified
actions pursuant to this Indenture, which Officers’ Certificate may be signed by any Person
authorized to sign an Officers’ Certificate, including any Person specified as so authorized in any
such certificate previously delivered and not superseded.

     SECTION 8.3. Individual Rights of Trustee. The Trustee in its individual or any
other capacity may become the owner or pledgee of Notes and may otherwise deal with the Company or
its Affiliates with the same rights it would have if it were not Trustee. Any Paying Agent,
Conversion Agent, Registrar, co-registrar or co-paying agent may do the same with like rights.
However, the Trustee must comply with Sections 8.10 and 8.11. In addition, the Trustee shall be
permitted to engage in transactions with the Company; provided, however, that if the Trustee
acquires any conflicting interest (as such term is defined in Section 310(b) of the TIA) the
Trustee must (i) eliminate such conflict within 90 days of acquiring such conflicting interest,
(ii) apply to the Commission for permission to continue acting as Trustee or (iii) resign as
Trustee hereunder.

     SECTION 8.4. Trustee’s Disclaimer. The Trustee shall not be responsible for and
makes no representation as to the validity or adequacy of this Indenture or the Notes, it shall
not be accountable for the Company’s use of the Notes or the proceeds from the Notes, and it shall
not be responsible for any statement of the Company in this Indenture or in any document issued or
offering circular (or similar document) used in connection with the sale of the Notes or in the
Notes other than the Trustee’s certificate of authentication or for the use or application of any
funds received by any Paying Agent other than the Trustee.

     SECTION 8.5. Notice of Defaults. If a Default or Event of Default occurs and is
continuing and if a Responsible Officer has actual knowledge thereof, the Trustee shall mail to
each Holder notice of the Default or Event of Default within 90 days after it occurs unless
such Default or Event of Default has been cured or waived.

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Except in the case of a Default or
Event of Default in payment of principal of, or interest on any Note (including payments pursuant
to the required repurchase provisions of such Note, if any), the Trustee may withhold the notice
if and so long as its board of directors, a committee of its board of directors or a committee of
its Responsible Officers and/or a Responsible Officer in good faith determines that withholding
the notice is in the interests of registered Holders.

     SECTION 8.6. Reports by Trustee to Holders. As promptly as practicable after each
March 15 beginning with the March 15 following the date of this Indenture, and in any event prior
to December 15 in each year, the Trustee shall mail to each Holder a brief report dated as of such
March 15 that complies with TIA § 313(a), if and to the extent such report may be required by the
TIA. The Trustee also shall comply with TIA § 313(b). The Trustee shall also transmit by mail all
reports required by TIA § 313(c).

     A copy of each report at the time of its mailing to Holders shall be filed with the Commission
and each stock exchange (if any) on which the Notes are listed. The Company agrees to notify
promptly the Trustee in writing whenever the Notes become listed on any stock exchange and of any
delisting thereof

     SECTION 8.7. Compensation and Indemnity. The Company covenants and agrees: (a) to
pay to the Trustee from time to time, and the Trustee shall be entitled to such compensation for
all services rendered by it hereunder as shall be agreed by the Company and the Trustee in writing
(which shall not be limited by any provision of law in regard to the compensation of a trustee of
an express trust); (b) to reimburse the Trustee and each predecessor Trustee upon its request for
all reasonable expenses, fees, disbursements and advances incurred or made by or on behalf of it
in accordance with any of the provisions of this Indenture (including the reasonable compensation,
fees, and the expenses and disbursements of its counsel and of all agents and other Persons not
regularly in its employ), except any such expense, disbursement or advance as may arise from its
negligence or bad faith; and (c) to indemnify the Trustee and each predecessor Trustee for, and to
hold it harmless against, any loss, liability, damage, claim or expense, including taxes, if any
(other than taxes based upon, determined by or measured by the income of the Trustee), incurred
without negligence or bad faith on its part, arising out of or in connection with the acceptance
or administration of this Indenture or the trusts hereunder and its duties hereunder, including
enforcement of this Section 8.7. The obligations of the Company under this Section to compensate
and indemnify the Trustee and each predecessor Trustee and to pay or reimburse the Trustee and
each predecessor Trustee for expenses, fees, disbursements and advances shall constitute an
additional obligation hereunder and shall survive the satisfaction and discharge of this
Indenture, the resignation or removal of the Trustee or the termination of this Indenture. To
secure the obligations of the Company to the Trustee under this Section 8.7, the Trustee shall
have a prior Lien upon all property and funds held or collected by the Trustee as such, except
funds and property paid by the Company and held in trust for the benefit of the Holders of
particular Notes. When the Trustee incurs expenses or renders services after an Event of Default
specified in Section 7.1(9) or (10) occurs, such expenses and compensation for services are
intended to constitute expenses of administration under the Bankruptcy Reform Act of 1978 or any
successor statute.

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     SECTION 8.8. Replacement of Trustee. The Trustee may resign at any time by so
notifying the Company. The Holders of a majority in principal amount of the Notes may remove the
Trustee by so notifying the Company and the Trustee in writing and the Company may appoint a
successor Trustee. The Company shall remove the Trustee if:

	 	(i)	 	the Trustee fails to comply with Section 8.10;
	 
	 	(ii)	 	the Trustee is adjudged bankrupt or insolvent;
	 
	 	(iii)	 	a receiver or other public officer takes charge of the Trustee or its property; or
	 
	 	(iv)	 	the Trustee otherwise becomes incapable of acting.

     If the Trustee resigns or is removed by the Company or by the Holders of a majority in
principal amount of the Notes and the Company does not reasonably promptly appoint a successor
Trustee, or if a vacancy exists in the office of Trustee for any reason (the Trustee in such event
being referred to herein as the retiring Trustee), the Holders of a majority in aggregate principal
amount of the Notes may appoint a successor Trustee.

     A successor Trustee shall deliver a written acceptance of its appointment to the retiring
Trustee and to the Company. Thereupon the resignation or removal of the retiring Trustee shall
become effective, and the successor Trustee shall have all the rights, powers and duties of the
Trustee under this Indenture. The successor Trustee shall mail a notice of its succession to
Holders. The retiring Trustee shall promptly transfer all property held by it as Trustee to the
successor Trustee, upon payment of any fees and expenses due and owing to it hereunder.

     If the Company has not appointed a successor Trustee within 60 days after the retiring Trustee
resigns or is removed, the retiring Trustee or the Holders of 10% in principal amount of the Notes
may petition, at the expense of the Company, any court of competent jurisdiction for the
appointment of a successor Trustee.

     If the Trustee fails to comply with Section 8.10, unless the Trustee’s duty to resign is
stayed as provided in TIA § 310(b), any Holder may petition any court of competent jurisdiction for
the removal of the Trustee and the appointment of a successor Trustee.

     Notwithstanding the replacement of the Trustee pursuant to this Section 8.8, the Company’s
obligations under Section 8.7 shall continue for the benefit of the retiring Trustee.

     SECTION 8.9. Successor Trustee by Merger. If the Trustee consolidates with, merges
or converts into, or transfers all or substantially all its corporate trust business or assets to,
another corporation or banking association, the resulting, surviving or transferee corporation
without any further act shall be the successor Trustee.

50

 

     In case at the time such successor or successors by merger, conversion or consolidation to the
Trustee shall succeed to the trusts created by this Indenture, any of the Notes shall have been
authenticated but not delivered, any such successor to the Trustee may adopt the certificate of
authentication of any predecessor trustee, and deliver such Notes so authenticated; and in
case at that time any of the Notes shall not have been authenticated, any successor to the Trustee
may authenticate such Notes either in the name of any predecessor hereunder or in the name of the
successor to the Trustee; and in all such cases such certificates shall have the full force which
it is anywhere in the Notes or in this Indenture provided that the certificate of the Trustee shall
have.

     SECTION 8.10. Eligibility; Disqualification. There shall at all times be a Trustee
hereunder which shall be eligible to act as Trustee under Trust Indenture Act Sections 310(a)(1)
and (2) and which shall have a combined capital and surplus of at least $100,000,000, and have a
Corporate Trust Office in the Borough of Manhattan in The City of New York, State of New York. If
such corporation publishes reports of condition at least annually, pursuant to law or to the
requirements of any federal, state, territorial or District of Columbia supervising or examining
authority, then for the purposes of this Section, the combined capital and surplus of such
corporation shall be deemed to be its combined capital and surplus as set forth in its most recent
report of condition so published. If at any time the Trustee shall cease to be eligible in
accordance with the provisions of this Section, the Trustee shall resign immediately in the manner
and with the effect hereinafter specified in this Article. To the extent permitted by the Trust
Indenture Act, the Trustee shall not be deemed to have a conflicting interest by virtue of being
Trustee under the Indenture dated as of April 10, 2006 between the Company and the Trustee.

     SECTION 8.11. Preferential Collection of Claims Against Company. If and when the
Trustee shall be or become a creditor of the Company, the Trustee shall comply with TIA § 311(a),
excluding any creditor relationship listed in TIA § 311(b). A Trustee who has resigned or been
removed shall be subject to TIA § 311(a) to the extent indicated.

ARTICLE IX

SATISFACTION AND DISCHARGE OF INDENTURE;

UNCLAIMED MONEYS

     SECTION 9.1. Satisfaction and Discharge of Indenture. If at any time (a) the
Company shall have paid or caused to be paid the principal of and interest on all the Notes
outstanding (other than Notes which have been destroyed, lost or stolen and which have been
replaced or paid as provided in Section 2.7) as and when the same shall have become due and
payable, or (b) the Company shall have delivered to the Trustee for cancellation all Notes
theretofore authenticated (other than Notes which have been destroyed, lost or stolen and which
have been replaced or paid as provided in Section 2.7); and if, in any such case, the Company
shall also pay or cause to be paid all other sums payable hereunder by the Company, then this
Indenture shall cease to be of further effect, and the Trustee, on demand of the Company
accompanied by an Officers’ Certificate and an Opinion of Counsel, each stating that all
conditions precedent relating to the satisfaction and discharge contemplated by this provision
have been complied with, and at the cost and expense of the Company, shall execute proper
instruments acknowledging such satisfaction and discharging this Indenture. The Company agrees to
reimburse the Trustee for any costs or expenses thereafter reasonably and properly incurred,
and to compensate the Trustee for any services thereafter reasonably and properly rendered,
by the Trustee in connection with this Indenture or the Notes.

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     If at any time the exact amount described in clause (ii) below can be determined at the time
of making the deposit referred to in such clause (ii), (i) all of the Notes not theretofore
delivered to the Trustee for cancellation shall have become due and payable, or are by their terms
to become due and payable within one year and (ii) (a) the Company shall have irrevocably deposited
or caused to be deposited with the Trustee as funds in trust, specifically pledged as security for,
and dedicated solely to, the benefit of the Holders of the Notes, cash in an amount or Government
Securities, maturing as to principal and interest, if any, at such times and in such amounts as
will insure the availability of cash or securities sufficient in the opinion of a nationally
recognized firm of independent public accountants expressed in a written certification thereof
delivered to the Trustee, to pay the principal of and interest, if any, on all of the Notes on each
date that such principal or interest, if any, is due and payable in accordance with the terms of
this Indenture and the Notes, and (b) the Company has paid or caused to be paid all other sums
payable hereunder by the Company; then the Company shall be deemed to have paid and discharged the
entire indebtedness on all the Notes on the date of the deposit referred to in this clause (ii),
and the provisions of this Indenture with respect to the Notes shall no longer be in effect (except
as to (i) rights of registration of transfer and exchange of Notes, (ii) substitution of mutilated,
defaced, destroyed, lost or stolen Notes, (iii) rights of Holders of Notes to receive payments of
principal thereof and interest, if any, thereon upon the original stated due dates therefor (but
not upon acceleration), (iv) the rights, obligations, duties and immunities of the Trustee
hereunder (including, but not limited to, those set forth in Section 8.7), (v) the rights of the
Holders of Notes as beneficiaries hereof with respect to the property so deposited with the Trustee
payable to all or any of them, (vi) rights of Holders of Notes to convert the Notes pursuant to
Article VI and (vii) the obligations of the Company under Section 9.2 with respect to the Notes),
and the Trustee, on demand of the Company accompanied by an Officers’ Certificate and an Opinion of
Counsel, each stating that all conditions precedent contemplated by this provision have been
complied with, and at the cost and expense of the Company, shall execute proper instruments
acknowledging such satisfaction and discharging such Indebtedness.

     SECTION 9.2. Application by Trustee of Funds Deposited for Payment of Notes. All
moneys deposited with the Trustee or any Paying Agent shall be held in trust and applied by it to
the payment, either directly or through any Paying Agent (other than the Company or any Subsidiary
thereof), to the Holders of the Notes for the payment of which such moneys have been deposited
with the Trustee, of all sums due and to become due thereon for principal and interest, if any,
but such money need not be segregated from other funds except to the extent required by law.

     SECTION 9.3. Repayment of Moneys Held by Paying Agent. In connection with the
satisfaction and discharge of this Indenture with respect to the Notes, all moneys then held by
any Paying Agent under the provisions of this Indenture with respect to the Notes shall, upon
demand of the Company, be repaid to it and thereupon such Paying Agent shall be released from all
further liability with respect to such moneys.

     SECTION 9.4. Return of Moneys Held by Trustee and Paying Agent Unclaimed for Two
Years. Any moneys deposited with or paid to the Trustee or any Paying Agent for the
payment of the principal of or interest, if any, on the Notes and not applied but remaining
unclaimed for two years after the date upon which such principal or interest, if any, shall have
become due and payable, shall, upon the written request of the Company and unless otherwise
required by mandatory provisions of applicable escheat or abandoned or unclaimed property law, be
repaid to the Company by the Trustee or such Paying Agent, and the Holder of the Notes shall,
unless otherwise required by mandatory provisions of applicable escheat or abandoned or unclaimed
property laws, thereafter look only to the Company for any payment which such Holder may be
entitled to collect, and all liability of the Trustee or any Paying Agent with respect to such
moneys shall thereupon cease; provided, however, that the Trustee or such Paying Agent, before
being required to make any such repayment with respect to moneys deposited with it for any payment
in respect of the Notes, shall, at the expense of the Company, mail by first-class mail to Holders
of the Notes at their addresses as they shall appear on the Note Register notice that such moneys
remain and that, after a date specified therein, which shall not be less than 30 days from the
date of such mailing or publication, any unclaimed balance of such money then remaining will be
repaid to the Company.

52

 

     SECTION 9.5. Indemnity for U.S. Government Obligations. The Company agrees to pay
and indemnify the Trustee against any tax, fee or other charge imposed on or assessed against the
Government Securities deposited pursuant to Section 9.1 or the principal or interest received in
respect of such obligations.

ARTICLE X

SUPPLEMENTAL INDENTURES AND AMENDMENTS

     SECTION 10.1. Without Consent of Holders. Without the consent of any Holders, the
Company, when authorized by a Board Resolution of the Company, and the Trustee, at any time and
from time to time, may amend, waive, modify or supplement this Indenture or the Notes for any of
the following purposes:

	 	(a)	 	to cure any ambiguity, omission, defect or inconsistency;
	 
	 	(b)	 	to provide for the assumption of the Company’s obligations under this Indenture and the
Notes in accordance with Article IV;
	 
	 	(c)	 	to secure the Notes or to provide guarantees of the Notes;
	 
	 	(d)	 	to comply with any requirements to effect or maintain the qualification of this Indenture
under the TIA;
	 
	 	(e)	 	to add covenants that would benefit the Holders of the Notes or to surrender any rights of
the Company under this Indenture;
	 
	 	(f)	 	to add Events of Default with respect to the Notes;
	 
	 	(g)	 	to make any change that does not adversely affect any outstanding Notes in any material
respect;

53

 

	 	(h)	 	to evidence and provide for the acceptance of the appointment of a successor Trustee
hereunder; or
	 
	 	(i)	 	to provide for the issuance of Additional Notes in accordance with the limitations set
forth in this Indenture as of the date hereof.

     SECTION 10.2. With Consent of Holders. With the written consent of the Holders of
not less than a majority in aggregate principal amount of the Outstanding Notes (including,
without limitation, Additional Notes, if any) delivered to the Company and the Trustee, the
Company when authorized by a Board Resolution, together with the Trustee, may amend, waive, modify
or supplement any other provision of this Indenture or the Notes; provided, however, that no such
amendment, waiver, modification or supplement may, without the written consent of the Holder of
each Outstanding Note affected thereby:

	 	(a)	 	modify the provisions with respect to a Holder’s rights upon a Fundamental Change in a
manner adverse to the Holders of the Notes, including the Company’s obligations to repurchase the
Notes following a Fundamental Change;
	 
	 	(b)	 	reduce the principal amount of or interest on Notes or change their Stated Maturity;
	 
	 	(c)	 	change the place or currency of payment of principal of or interest on any Note;
	 
	 	(d)	 	impair the Holder’s right to institute suit for the enforcement of any payment on the
Notes;
	 
	 	(e)	 	make any change in the percentage of principal amount of Notes necessary to waive
compliance with provisions of this Indenture or to make any change to this Section 10.2 or Section
10.3 (other than to increase the percentage required for modification or waiver or to provide for
consent of each affected Holder of Notes);
	 
	 	(f)	 	waive a Default or Event of Default in the payment of principal or interest on the Notes
(except a rescission of acceleration of the Notes by the Holders thereof as provided in Section
7.2(3) of this Indenture and a waiver of the payment default that resulted from such acceleration);
	 
	 	(g)	 	adversely affect the rights of Holders under the conversion provisions of the Notes; or
	 
	 	(h)	 	modify the ranking or priority of any Note in any manner adverse to the Holders of the
Notes.

     Upon the written request of the Company accompanied by a copy of a Board Resolution
authorizing the execution of any such supplemental indenture or other agreement, instrument or
waiver, and upon the filing with the Trustee of evidence of the consent of Holders as aforesaid,
the Trustee shall join with the Company in the execution of such supplemental indenture or other
agreement, instrument or waiver.

54

 

     It shall not be necessary for any act of Holders under this Section to approve the particular
form of any proposed supplemental indenture or other agreement, instrument or waiver, but it shall
be sufficient if such act shall approve the substance thereof.

     SECTION 10.3. Execution of Supplemental Indentures, Agreements and Waivers. In
executing, any supplemental indenture, agreement, instrument or waiver permitted by this Article X
or the modifications thereby of the Indenture, the Trustee shall be entitled to receive, and
(subject to Section 8.1 hereof) shall be fully protected in relying upon, an Opinion of Counsel
and an Officers’ Certificate from each obligor under the Notes entering into such supplemental
indenture, agreement, instrument or waiver, each stating that the execution of such supplemental
indenture, agreement, instrument or waiver (a) is authorized or permitted by this Indenture; (b)
does not violate the provisions of any agreement or instrument evidencing any other Indebtedness
of the Company, or any Subsidiary of the Company; and (c) that all conditions precedent in the
Indenture relating to such Supplemental Indenture have been complied with. The Trustee may, but
shall not be obligated to, enter into any such supplemental indenture, agreement, instrument or
waiver which affects the Trustee’s own rights, duties or immunities under this Indenture, the
Notes or otherwise.

     SECTION 10.4. Effect of Supplemental Indentures. Upon the execution of any
supplemental indenture under this Article X, this Indenture, the Notes, if applicable, shall be
modified in accordance therewith, and such supplemental indenture shall form a part of this
Indenture and the Notes, if applicable, as the case may be, for all purposes; and every Holder of
Notes theretofore or thereafter authenticated and delivered hereunder shall be bound thereby.

     SECTION 10.5. Compliance with Trust Indenture Act. Every supplemental indenture or
amendment to this Indenture or the Notes shall comply with the TIA as then in effect.

     SECTION 10.6. Reference in Notes to Supplemental Indentures. Notes authenticated
and delivered after the execution of any supplemental indenture pursuant to this Article may, and
shall if required by the Trustee, bear a notation in a form approved by the Trustee as to any
matter provided for in such supplemental indenture. If the Company shall so determine, new Notes
so modified as to conform, in the opinion of the Trustee and the Board of Directors of the
Company, to any such supplemental indenture may be prepared and executed by the Company and
authenticated and delivered by the Trustee, at the expense of the Company, upon a Company Order in
exchange for Outstanding Notes.

     SECTION 10.7. Revocation and Effect of Consents and Waivers. A consent to an
amendment or a waiver by a Holder of a Note shall bind the Holder and every subsequent Holder of
that Note or portion of the Note that evidences the same debt as the consenting Holder’s Note,
even if notation of the consent or waiver is not made on the Note. However, any such Holder or
subsequent Holder may revoke the consent or waiver as to such Holder’s Note or portion of the Note
if the Trustee receives the notice of revocation before the date the amendment or waiver becomes
effective. After an amendment or waiver becomes effective, it shall bind every Holder. An
amendment or waiver made pursuant to Section 10.2 shall become effective upon receipt by the
Trustee of the requisite number of written consents.

55

 

     The Company may, but shall not be obligated to, fix a record date for the purpose of
determining the Holders entitled to give their consent or take any other action described above or
required or permitted to be taken pursuant to this Indenture. If a record date is fixed, then
notwithstanding the immediately preceding paragraph, those Persons who were Holders at such record
date (or their duly designated proxies), and only those Persons, shall be entitled to give such
consent or to revoke any consent previously given or to take any such action, whether or not such
Persons continue to be Holders after such record date. No such consent shall become valid or
effective more than 120 days after such record date.

     SECTION 10.8. Notation on or Exchange of Notes. If an amendment changes the terms
of a Note, the Trustee may require the Holder of the Note to deliver it to the Trustee. The
Trustee may place an appropriate notation on the Note regarding the changed terms and return it to
the Holder. Alternatively, if the Company or the Trustee so determines, the Company in exchange
for the Note shall issue and the Trustee, at the expense of the Company, shall authenticate a new
Note that reflects the changed terms. Failure to make the appropriate notation or to issue a new
Note shall not affect the validity of such amendment.

ARTICLE XI

MISCELLANEOUS

     SECTION 11.1. Trust Indenture Act Controls. If any provision of this Indenture
limits, qualifies or conflicts with another provision which is required to be included in this
Indenture by the TIA, the provision required by the TIA shall control.

     SECTION 11.2. Notices. Any notice or communication shall be in writing and
delivered in person or mailed by first-class mail addressed as follows:

If to the Company:

Ciena Corporation

1201 Winterson Road

Linthicum, MD 21090

Attn: Chief Financial Officer

If to the Trustee:

The Bank of New York

101 Barclay Street, Floor 8W

New York, New York 10286

Attn: Corporate Trust Administration

     The Company on one hand or the Trustee on the other hand by notice to the other may designate
additional or different addresses for subsequent notices or communications.

     Any notice or communication mailed to a Holder shall be mailed to the Holder at the Holder’s
address as it appears on the Note Register and shall be sufficiently given if so mailed within the
time prescribed. Notices shall be deemed to have been given as of the date of mailing.

56

 

     Failure to mail a notice or communication to a Holder or any defect in it shall not affect its
sufficiency with respect to other Holders. If a notice or communication is mailed in the manner
provided above, it is duly given, whether or not the addressee receives it.

     SECTION 11.3. Communication by Holders with Other Holders. Holders may communicate
pursuant to TIA § 312(b) with other Holders with respect to their rights under this Indenture or
the Notes. The Trustee shall comply with TIA § 312(b). The Company, the Trustee, the Registrar and
anyone else shall have the protection of TIA § 312(c).

     SECTION 11.4. Certificate and Opinion as to Conditions Precedent. Upon any request
or application by the Company to the Trustee to take or refrain from taking any action under this
Indenture, the Company shall deliver to the Trustee an Officers’ Certificate stating that all
conditions precedent (including covenants compliance with which constitutes a condition
precedent), if any, provided for in this Indenture relating to the proposed action have been
complied with and an Opinion of Counsel stating that in the opinion of such counsel, all such
conditions precedent (including covenants compliance with which constitutes a condition
precedent), if any, have been complied with. Notwithstanding the foregoing, in the case of any
such request or application as to which the furnishing of any Officers’ Certificate or Opinion of
Counsel is specifically required by any provision of this Indenture relating to such particular
request or application, no additional certificate or opinion need be furnished.

     SECTION 11.5. Statements Required in Certificate or Opinion. Each certificate or
opinion with respect to compliance with a covenant or condition provided for in this Indenture
shall include:

     (1) a statement that the individual making such certificate or opinion has read such covenant
or condition;

     (2) a brief statement as to the nature and scope of the examination or investigation upon
which the statements or opinions contained in such certificate or opinion are based;

     (3) a statement that, in the opinion of such individual, he has made such examination or
investigation as is necessary to enable him to express an informed opinion as to whether or not
such covenant or condition has been complied with; and

     (4) a statement as to whether or not, in the opinion of such individual, such covenant or
condition has been complied with.

     In giving an Opinion of Counsel, counsel may rely as to factual matters on an Officers’
Certificate or such other certificates of Officer(s) as it may deem appropriate and on certificates
of public officials.

     SECTION 11.6. When Notes Disregarded. In determining whether the Holders of the
required principal amount of Notes have concurred in any direction, waiver or consent, Notes owned
by the Company or by any Person directly or indirectly controlling or controlled by or under
direct or indirect common control with the Company shall be disregarded and deemed not to be
outstanding, except that, for the purpose of determining whether the Trustee shall be protected in
relying on any such direction, waiver or consent, only Notes which a Responsible
Officer of the Trustee actually knows are so owned shall be so disregarded. Also, subject to
the foregoing, only Notes outstanding at the time shall be considered in any such determination.

57

 

     SECTION 11.7. Rules by Trustee, Paying Agent and Registrar. The Trustee may make
reasonable rules for action by, or a meeting of, Holders. The Registrar and the Paying Agent may
make reasonable rules for their functions.

     SECTION 11.8. Governing Law. This Indenture and the Notes shall be governed by, and
construed in accordance with, the laws of the State of New York.

     SECTION 11.9. No Recourse Against Others. No recourse for the payment of the
principal of, or interest on any Note and no recourse under or upon any obligation, covenant,
agreement of the Company or of a guarantor in this Indenture, the Notes, or in any supplemental
indenture, or because of the creation of any Indebtedness represented thereby, shall be had
against any incorporator, stockholder, employee, agent, officer, director, or subsidiary, past,
present or future, of the Company or of any successor corporation or entity, whether by virtue of
any constitution, statute or rule of law, or by the enforcement of any assessment or penalty or
otherwise, it being understood that all such liability is hereby waived and released as a
condition to, and as a consideration for, the execution and delivery of this Indenture and the
issue of the Notes.

     SECTION 11.10. Successors. All agreements of the Company in this Indenture and the
Notes shall bind its successors. All agreements of the Trustee in this Indenture shall bind its
successors.

     SECTION 11.11. Multiple Originals. The parties may sign any number of copies of
this Indenture. Each signed copy shall be an original, but all of them together represent the same
agreement. One signed copy is enough to prove this Indenture.

     SECTION 11.12. Force Majeure. In no event shall the Trustee be responsible or liable
for any failure or delay in the performance of their obligations hereunder arising out of or
caused by, directly or indirectly, forces beyond their control, including, without limitation,
strikes, work stoppages other than of the Trustee, respectively, accidents, acts of war or
terrorism, civil or military disturbances, nuclear or natural catastrophes or acts of God, and
interruptions, loss or malfunctions of utilities; it being understood that the Company or Trustee,
as applicable, shall use reasonable efforts that are consistent with accepted practices in the
banking industry to resume performance as soon as practicable under the circumstances.

     SECTION 11.13. Not Responsible for Recitals or Issuance of Notes. The recitals contained
herein and in the Notes, except the Trustee’s certificates of authentication, shall be taken as
the statements of the Company, and the Trustee or any Authenticating Agent assumes no
responsibility for their correctness. The Trustee makes no representations as to the validity or
sufficiency of this Indenture or of the Securities. The Trustee or any Authenticating Agent shall
not be accountable for the use or application by the Company of Notes or the proceeds thereof.

58

 

     SECTION 11.14. Waiver of Jury Trial. EACH OF THE COMPANY AND THE TRUSTEE HEREBY
IRREVOCABLY WAIVES, TO THE FULLEST EXTENT PERMITTED
BY APPLICABLE LAW, ANY AND ALL RIGHT TO TRIAL BY JURY IN ANY LEGAL PROCEEDING ARISING OUT OF
OR RELATING TO THIS INDENTURE, THE NOTES OR THE TRANSACTION CONTEMPLATED HEREBY.

[Remainder of Page Intentionally Left Blank]

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     IN WITNESS WHEREOF, the parties hereto have caused this Indenture to be duly executed, all as
of the date first written above.

	 	 	 	 	 	 	 
	 

	 	 	 	 	 	 
	 	 	CIENA CORPORATION	 	 
	 
	 	 	 	 	 	 
	 

	 	By:	 	 /s/ Joseph R. Chinnici	 	 
	 

	 	 	 	 	 	 
	 

	 	Name:	 	 Joseph R. Chinnici	 	 
	 

	 	Title:	 	 Senior Vice President,
Finance and Chief Financial Officer	 	 
	 
	 	 	 	 	 	 
	 	 	THE BANK OF NEW YORK, as Trustee	 	 
	 
	 	 	 	 	 	 
	 

	 	By:	 	 /s/ Cheryl L. Clarke	 	 
	 

	 	 	 	 	 	 
	 

	 	Name:	 	 Cheryl L. Clarke	 	 
	 

	 	Title:	 	 Vice President	 	 

S-1

 

Exhibit A

[FORM OF FACE OF SECURITY]

CUSIP/ISIN 171779AE1/US171779AE10

0.875% Convertible Senior Notes due 2017

			
	 	 	 
	No.
	 	$

Ciena Corporation

promises to pay to

or registered assigns,

the principal sum of

Dollars on June 15, 2017.

Interest Payment Dates: June 15 and December 15

Record Dates: June 1 and December 1

Dated:                     _, 2007

	 	 	 	 	 	 	 
	 

	 	 	 	 	 	 
	 	 	Ciena Corporation	 	 
	 
	 	 	 	 	 	 
	 

	 	By:	 	 	 	 
	 

	 	 	 	 	 	 
	 

	 	 	 	Name:	 	 
	 

	 	 	 	Title:	 	 

This is one of the Notes referred to in the

within-mentioned Indenture:

THE BANK OF NEW YORK,

as Trustee

By:                                        

           Authorized Signatory

THIS SECURITY IS A GLOBAL SECURITY WITHIN THE MEANING OF THE INDENTURE HEREINAFTER REFERRED TO AND
IS REGISTERED IN THE NAME OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION (“DEPOSITARY”),
OR A NOMINEE OF THE DEPOSITARY, WHICH MAY BE TREATED

A-1

 

BY THE COMPANY, THE TRUSTEE AND ANY AGENT THEREOF AS THE OWNER AND HOLDER OF THIS SECURITY FOR ALL
PURPOSES. UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITARY TO
THE COMPANY OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY CERTIFICATE
ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR IN SUCH OTHER NAME AS IS REQUESTED BY AN
AUTHORIZED REPRESENTATIVE OF THE DEPOSITARY (AND ANY PAYMENT IS MADE TO CEDE & CO. OR TO SUCH OTHER
ENTITY AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITARY), ANY TRANSFER, PLEDGE, OR
OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL INASMUCH AS THE REGISTERED
OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.

TRANSFERS OF THIS GLOBAL SECURITY SHALL BE LIMITED TO TRANSFERS IN WHOLE, BUT NOT IN PART, BY THE
DEPOSITARY TO A NOMINEE OF THE DEPOSITARY OR BY A NOMINEE OF THE DEPOSITARY TO THE DEPOSITARY OR
ANOTHER NOMINEE OF THE DEPOSITARY OR BY THE DEPOSITARY OR ANY SUCH NOMINEE TO A SUCCESSOR
DEPOSITARY OR A NOMINEE OF SUCH SUCCESSOR DEPOSITARY, AND TRANSFERS OF PORTIONS OF THIS GLOBAL
SECURITY SHALL BE LIMITED TO TRANSFERS MADE IN ACCORDANCE WITH THE RESTRICTIONS SET FORTH IN THE
INDENTURE REFERRED TO ON THE REVERSE HEREOF.

A-2

 

[Back of Note]

0.875% Convertible Senior Notes due 2017

     Capitalized terms used herein have the meanings assigned to them in the Indenture referred to
below unless otherwise indicated.

     (1) Interest. Ciena Corporation, a Delaware corporation (the “Company”), promises to pay
interest on the principal amount of this Note at 0.875% per annum from June 11, 2007 until
Maturity. The Company will pay interest, if any, semi-annually in arrears on June 15 and December
15 of each year (subject to limited exceptions if the Note is converted or purchased prior to such
date), or if any such day is not a Business Day, on the immediately following Business Day (each,
an “Interest Payment Date”). Interest on the Notes will accrue from the most recent date to which
interest has been paid or, if no interest has been paid, from June 11, 2007; provided that if there
is no existing Default in the payment of interest, and if this Note is authenticated between a
Record Date referred to on the face hereof and the next succeeding Interest Payment Date, interest
shall accrue from such next succeeding Interest Payment Date; provided, further, that the first
Interest Payment Date shall be December 15, 2007. The Company will pay interest on overdue
principal from time to time on demand at the rate then in effect to the extent lawful; it will pay
interest on overdue installments of interest, if any (without regard to any applicable grace
periods), from time to time on demand at the same rate to the extent lawful. Interest will be
computed on the basis of a 360-day year of twelve 30-day months.

     (2) Method of payment. The Company will pay interest on the Notes, if any, to the Persons who
are registered Holders of Notes at the close of business on the December 1 or June 1 next preceding
the Interest Payment Date (each a “Regular Record Date”), even if such Notes are canceled after
such record date and on or before such Interest Payment Date. The Notes will be payable as to
principal, if any, and interest at the office or agency of the Company maintained for such purpose
within or without the City and State of New York, or, at the option of the Company, payment of
interest, if any, may be made by check mailed to the Holders at their addresses set forth in the
Note Register; provided that payment by wire transfer of immediately available funds will be
required with respect to principal of and interest, if any, on, all Global Notes and all other
Notes with an aggregate principal amount in excess of $2 million for which the Holders have
provided wire transfer instructions at least 10 Business Days prior to the Interest Payment Date to
the Company or the Paying Agent. Such payment will be in such coin or currency of the United
States of America as at the time of payment is legal tender for payment of public and private
debts.

     (3) Paying agent, registrar and conversion agent. Initially, The Bank of New York, the
Trustee under the Indenture, will act as Paying Agent, Registrar and Conversion Agent. The Company
may change any Paying Agent, Registrar or Conversion Agent without notice to any Holder. The
Company or any of its Subsidiaries may act in any such capacity.

     (4) Indenture. The Company issued the Notes under the Indenture dated as of June 11, 2007
(the “Indenture”) between the Company and the Trustee. The terms of the Notes include those stated
in the Indenture and those made part of the Indenture by reference to the TIA. The Notes are
subject to all such terms, and Holders are referred to the Indenture and the TIA for a statement of
such terms. To the extent any provision of this Note conflicts with the
express provisions of the Indenture, the provisions of the Indenture shall govern and be
controlling. The Notes are unsecured obligations of the Company.

A-3

 

     (5) Optional redemption. The Notes are not redeemable by the Company prior to Maturity.

     (6) Repurchase at the option of holder upon a fundamental change. Upon the occurrence of a
Fundamental Change at any time prior to Stated Maturity, each Holder may require the Company to
repurchase the Notes on a date chosen by the Company in its sole discretion that is no less than 20
Business Days and no more than 35 Business Days after the mailing of the Fundamental Change
Repurchase Right Notice (the “Fundamental Change Repurchase Date”), and the Company shall
repurchase on the Fundamental Change Repurchase Date, any or all Notes submitted for repurchase for
cash, at a price equal to 100% of the aggregate principal amount thereof plus accrued and unpaid
interest, if any, to but not including the Fundamental Change Repurchase Date, unless such
Fundamental Change Repurchase Date falls after a Regular Record Date and on or prior to the
corresponding Interest Payment Date, in which case the Company shall pay the full amount of accrued
and unpaid interest payable on such Interest Payment Date to the Holder of record at the close of
business on the corresponding Regular Record Date. At least 20 Business Days prior to the
anticipated Effective Date of a Fundamental Change (or if the Company does not have actual notice
of a Fundamental Change 20 Business Days prior to the Effective Date, as soon as the Company has
actual notice of such Fundamental Change), the Company will provide to all Holders, the Trustee,
the Paying Agent, the Registrar and the Conversion Agent a Fundamental Change Notice as required by
the Indenture. On or before the 20th Trading Day after the Effective Date of a Fundamental Change,
the Company will provide to all Holders, the Trustee, the Paying Agent, the Registrar and
Conversion Agent a Fundamental Change Repurchase Right Notice.

     (7) Conversion. At any time prior to Maturity, Holders of the Notes may surrender any portion
of the principal amount of any Note that is an integral multiple of $1,000 for conversion (provided
that the principal amount of such Note to remain outstanding after such conversion is equal to
$2,000) into fully paid and non-assessable shares of Common Stock at the Conversion Rate,
determined as provided in the Indenture, in effect at the time of conversion.

     (8) Denominations, transfer, exchange. The Notes are in registered form without coupons in
denominations of $2,000 and integral multiples of $1,000. The transfer of Notes may be registered
and Notes may be exchanged as provided in the Indenture. The Registrar and the Trustee may require
a Holder, among other things, to furnish appropriate endorsements and transfer documents and the
Company may require a Holder to pay any taxes and fees required by law or permitted by the
Indenture. The Company need not exchange or register the transfer of any Note or portion of a Note
selected for conversion or repurchase, except for the unconverted or unrepurchased portion of any
Note being converted or repurchased in part. Also, the Company need not exchange or register the
transfer of any Notes during the period between a Regular Record Date and the corresponding
Interest Payment Date.

     (9) Persons deemed owners. The registered Holder of a Note may be treated as its owner for
all purposes.

A-4

 

     (10) Amendment, supplement and waiver. Subject to certain exceptions, the Indenture and the
Notes may be amended or supplemented with the consent of the Holders of at least a majority in
aggregate principal amount of the then outstanding Notes, including Additional Notes, if any, and
any existing Default or compliance with any provision of the Indenture and the Notes may be waived
with the consent of the Holders of a majority in aggregate principal amount of the then outstanding
Notes, including Additional Notes, if any, voting as a single class. Without the consent of any
Holder of a Note, the Indenture and the Notes may be amended or supplemented to cure any ambiguity,
omission, defect or inconsistency, to provide for a successor Trustee under the Indenture, to
provide for the assumption of the Company’s obligations under the Indenture or the Notes in
accordance with the provisions in the Indenture, to comply with requirements of the Commission in
order to effect or maintain the qualification of the Indenture under the TIA, to secure the Notes
or provide guarantees of the Notes, to provide for the issuance of Additional Notes, to add
covenants that would benefit the Holders of the Notes or to surrender any rights of the Company
under the Indenture, to add Events of Default with respect to the Notes, to make any change that
does not adversely affect any outstanding Notes in any material respect, or to evidence and provide
for the acceptance of the appointment of a successor Trustee under the Indenture.

     (11) Events of default. Each of the following is an “Event of Default”:

          (1) a default in the payment of any installment of interest upon any Note as and when the same
shall become due and payable, and continuance of such default for a period of 30 days;

          (2) default in the payment of all or any part of the principal of any Note as and when the
same shall become due and payable at Maturity;

          (3) default on the part of the Company in the performance, or breach by the Company, of any
other covenant or agreement on the part of the Company set forth in, or deemed to be incorporated
by reference to the Trust Indenture Act into, this Note or in the Indenture (other than a covenant
or agreement in respect of which a default or breach by the Company is specifically dealt with in
Section 7.1 of the Indenture), and continuance of such default or breach without cure or waiver for
a period of 90 days after there has been given, by registered or certified mail, to the Company by
the Trustee, or to the Company and the Trustee by the Holders of at least 25% in principal amount
of the Notes at the time Outstanding, a written notice specifying such failure and requiring the
same to be remedied;

          (4) the Company fails to pay the purchase price of any Note when due (including, without
limitation, on any Fundamental Change Repurchase Date) within the time period required by the
Indenture;

          (5) The Company fails to deliver shares of Common Stock and any cash in lieu of fractional
shares upon conversion of this Note within the time period required by the Indenture;

A-5

 

          (6) the Company fails to provide a timely Fundamental Change Repurchase Right Notice, if
required by the Indenture, if such failure continues for 30 days after notice to the Company of its
failure to do so;

          (7) any indebtedness for money borrowed by the Company or any of its Subsidiaries (all or
substantially all of the outstanding voting securities of which are owned, directly, or indirectly,
by the Company) in an aggregate outstanding principal amount in excess of $25.0 million is not paid
at final maturity or upon acceleration and such indebtedness is not discharged, or such
acceleration is not cured or rescinded, within 10 days after written notice specifying such failure
and requiring the same to be remedied;

          (8) failure by the Company or any of its Subsidiaries (all or substantially all of the
outstanding voting securities of which are owned, directly, or indirectly, by the Company) to pay
final and non-appealable judgments entered by a court or courts of competent jurisdiction, the
aggregate uninsured or unbonded portion of which is at least $25.0 million, if the judgments are
not paid, discharged or stayed within 60 days;

          (9) the Company or any of its Subsidiaries pursuant to or within the meaning of Bankruptcy
Law:

               (A) commences a voluntary case,

               (B) consents to the entry of an order for relief against it in an involuntary case,

               (C) consents to the appointment of a custodian of it or for all or substantially all of its
property, or

               (D) makes a general assignment for the benefit of its creditors; and

               (10) a court of competent jurisdiction enters an order or decree under any Bankruptcy Law
that:

               (A) is for relief against the Company or any of its Subsidiaries in an involuntary case;

               (B) appoints a custodian of the Company or any of its Subsidiaries or for all or substantially
all of the property of the Company or any of its Subsidiaries; or

               (C) orders the liquidation of the Company or any of its Subsidiaries;

and the order or decree remains unstayed and in effect for 60 consecutive days.

Notwithstanding the foregoing, at the election of the Company, for the first 90 days after the
occurrence of an Event of Default specified in Section 7.1(3) of the Indenture relating to any
failure by the Company to comply with the requirements of Section 314(a)(1) of the TIA, the remedy
for such an Event of Default shall consist exclusively of the right to receive an extension fee on
the Notes at an annual rate equal to 0.25% of the principal amount of the Notes.

A-6

 

In the
event that the Company does not elect to pay the extension fee upon an Event of Default in
accordance with this paragraph, the Notes will be subject to acceleration as provided herein. The
extension fee will accrue on all outstanding Notes from and including the date on which an Event of
Default relating to a failure to comply with the requirements of Section 314(a)(1) of the TIA first
occurs up to but not including the 90th day thereafter (or such earlier date on which the Event of
Default relating to such obligations shall have been cured or waived pursuant to Section 7.4 of the
Indenture). On such 90th day (or earlier, if such Event of Default is cured or waived pursuant to
Section 7.4 of the Indenture prior to such 90th day), such extension fee will cease to accrue and
shall become due and payable and, if such Event of Default has not been cured or waived pursuant to
Section 7.4 prior to such 90th day, then the Trustee or the holders of not less than 25% in
principal amount of the Notes may declare the principal of and accrued and unpaid interest on all
such Notes to be due and payable immediately. This provision shall not affect the rights of Holders
in the event of the occurrence of any other Event of Default. If the Company elects to pay the
extension fee in accordance with this paragraph, the Company shall notify, in the manner provided
for in Section 11.2 of the Indenture, the Holders and the Trustee of such election at any time on
or before the close of business on the date on which such Event of Default first occurs. If the
extension fee is payable under this Section 7.1 of the Indenture, the Company shall deliver to the
Trustee an Officers’ Certificate to that effect stating the date on which the extension fee is
payable. Unless and until a Responsible Officer receives at the Corporate Trust Office such a
certificate, the Trustee may assume without inquiry that no extension fee is payable. If the
extension fee has been paid by the Company directly to the Persons entitled to such fee, the
Company shall deliver to the Trustee a certificate setting forth the particulars of such payment.

          (12) Trustee dealings with company. The Trustee, in its individual or any other capacity, may
make loans to, accept deposits from, and perform services for the Company or its Affiliates, and
may otherwise deal with the Company or its Affiliates, as if it were not the Trustee.

          (13) No recourse against others. A director, officer, employee, incorporator or stockholder
of the Company, as such, will not have any liability for any obligations of the Company under the
Notes or the Indenture or for any claim based on, in respect of, or by reason of, such obligations
or their creation. Each Holder by accepting a Note waives and releases all such liability. The
waiver and release are part of the consideration for the issuance of the Notes.

          (14) Open market purchases. The Company may, to the extent permitted by applicable law, at
any time, and from time to time, purchase Notes at any price in the open market or otherwise.

          (15) Authentication. This Note will not be valid until authenticated by the manual signature
of the Trustee or an Authenticating Agent.

          (16) Abbreviations. Customary abbreviations may be used in the name of a Holder or an
assignee, such as: TEN COM (= tenants in common), TEN ENT (= tenants by the entireties), JT TEN (=
joint tenants with right of survivorship and not as tenants in common), CUST (= Custodian), and
U/G/M/A (= Uniform Gifts to Minors Act).

A-7

 

          (17) CUSIP numbers. Pursuant to a recommendation promulgated by the Committee on Uniform
Security Identification Procedures, the Company has caused CUSIP numbers to be printed on the
Notes, and the Trustee may use CUSIP numbers in notices of repurchase or conversion as a
convenience to Holders. No representation is made as to the accuracy of such numbers either as
printed on the Notes or as contained in any notice of repurchase or conversion, and reliance may be
placed only on the other identification numbers placed thereon.

          (18) Governing law. THE INTERNAL LAW OF THE STATE OF NEW YORK WILL GOVERN AND BE USED TO
CONSTRUE THE INDENTURE AND THIS NOTE WITHOUT GIVING EFFECT TO APPLICABLE PRINCIPLES OF CONFLICTS OF
LAW TO THE EXTENT THAT THE APPLICATION OF THE LAWS OF ANOTHER JURISDICTION WOULD BE REQUIRED
THEREBY.

A-8

 

ASSIGNMENT FORM

To assign this Note, fill in the form below:

	 	 	 	 	 
	 

	 	 	 	 
	(I) or (we) assign and transfer this Note to
	 	 	 	 
	 

	 	 	 	 
	 

	 	          (Insert assignee’s legal name)	 	 

 

(Insert assignee’s soc. sec. or tax I.D. No.)

 

 

 

 

(Print or type assignee’s name, address and zip code)

and irrevocably appoint          to transfer this Note on the books of the Company. The agent may substitute
another to act for him.

Date:                                        

	 	 	 	 	 
	 

	 	Your Signature:	 	 
	 

	 	 
	 	 
	 

	 	
	 	(Sign exactly as your name appears on
the face of this Note)

Signature Guarantee*:                                        

 

			
	*	 	Participant in a recognized Signature Guarantee Medallion Program (or other signature guarantor
acceptable to the Trustee).

A-9

 

SCHEDULE OF EXCHANGES OF INTERESTS IN THE GLOBAL NOTE

     The following exchanges of a part of this Global Note for an interest in another Global Note
or for a Definitive Note, or exchanges of a part of another Global Note or Definitive Note for an
interest in this Global Note, have been made:

	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 
	 	 	 	 	 	 	 	 	 	 	Principal Amount of	 	 	Signature of authorized	 
	 	 	Amount of decrease	 	 	Amount of increase in	 	 	this Global Note	 	 	officer of	 
	 	 	in Principal Amount	 	 	Principal Amount	 	 	following such	 	 	Trustee or Notes	 
	Date of Exchange	 	of this Global Note	 	 	of this Global Note	 	 	decrease (or increase)	 	 	Custodian	 
	 
	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 

A-10

 

Exhibit B

FORM OF CONVERSION NOTICE

Ciena Corporation

The Bank of New York

	 	 	 
	Re:

	 	0.875% Convertible Senior Notes due 2017
	 

	 	— REPURCHASE NOTICE (CUSIP 171779AE1)

              Reference is hereby made to the Indenture, dated as of June 11, 2007 (the “Indenture”),
between Ciena Corporation, as issuer (the “Company”), and The Bank of New York, as trustee (the
“Trustee”). Capitalized terms used but not defined herein shall have the meanings given to them in
the Indenture.

                    (the “Owner”) owns and proposes to convert the Note[s] or interest in such Note[s] specified
herein, in the principal amount of $ in such Note[s] or interests (the “Conversion”) pursuant to
Article VI of the Indenture. In connection with the Conversion, the Owner hereby certifies that, as
Owner of this Note, he/she hereby irrevocably exercises the option to convert this Note, or such
portion of this Note in the principal amount designated above into the number of shares of Common
Stock of the Company equal to (x) the aggregate principal amount of Notes to be converted divided
by 1,000 multiplied by (y) the Applicable Conversion Rate. The Owner directs that such shares,
together with a check in payment for any fractional share and any Notes representing any
unconverted principal amount hereof, be delivered to and be registered in the name of the
undersigned unless a different name has been indicated below. If shares of Common Stock or Notes
are to be registered in the name of a Person other than the undersigned, (a) the undersigned will
pay all transfer taxes payable with respect thereto and (b) signature(s) must be guaranteed by an
Eligible Guarantor Institution with membership in an approved signature guarantee program pursuant
to Rule 17Ad-15 under the Securities Exchange Act of 1934. Any amount required to be paid by the
undersigned on account of interest accompanies this Note.

Dated:                                        

	 	 	 	 	 
	 

	 	 	 	 
	 

	 	 	 	 
	 

	 	Signature(s)	 	 

B-1

 

If shares of Common Stock or Notes are to be registered in the name of a Person

other than the Holder, please print such Person’s name and address:

                                        

(Name)

	 	 	 
	 

	 	 
	 

	 	 
	 
	 	 
	 

(Address)

	 	 
	 
	 	 
	 

Social Security or other Identification Number, if any.

	 	 
	 
	 	 
	 

[Signature Guaranteed]

	 	 

If only a portion of a Definitive Note is to be converted, please indicate:

	1.	 	Principal amount to be converted: $
	 
	2.	 	Principal amount and denomination of Notes representing unpurchased principal amount to be
issued:

	 	 	 
	Amount: $

	 	Denominations: $

($2,000 or any integral multiple of $1,000 in excess thereof, provided that the unconverted portion
of such principal amount is $2,000 or any integral multiple of $1,000 in excess thereof.)

B-2

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