Document:

Secured Promissory Note

 Exhibit 10.1 
  
 THE SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR THE SECURITIES LAWS
OF ANY STATE, AND HAVE BEEN ACQUIRED FOR INVESTMENT AND NOT WITH A VIEW TO, OR IN CONNECTION WITH, THE SALE OR DISTRIBUTION THEREOF. NO SUCH SALE OR DISTRIBUTION MAY BE EFFECTED WITHOUT AN EFFECTIVE REGISTRATION STATEMENT RELATED THERETO OR AN
OPINION OF COUNSEL IN A FORM SATISFACTORY TO THE COMPANY THAT SUCH REGISTRATION IS NOT REQUIRED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR THE APPLICABLE SECURITIES LAWS OF ANY STATE. 
  
 SECURED PROMISSORY NOTE 
  

			
	$328,773.00	 	February 2, 2006

 Clearwater, Florida 
  
 For value received, Digital Lightwave, Inc., a Delaware corporation (the “Company”), promises to pay to
Optel Capital, LLC, a Delaware limited liability company (the “Holder”), or its registered assigns, the principal sum of Three Hundred Twenty Eight Thousand Seven Hundred Seventy Three Dollars ($328,773.00). Interest shall accrue
from the date of this Note on the unpaid principal amount at a rate equal to 10.0% per annum, compounded annually. The interest rate shall be computed on the basis of the actual number of days elapsed and a year of 360 days. This Note is
subject to the following terms and conditions. 
  
 1.
Maturity. 
  
 (a) Principal and any accrued but
unpaid interest under this Note shall be due and payable upon demand by the Holder at any time after March 31,2006. 
  
 (b) Notwithstanding the foregoing, the entire unpaid principal sum of this Note, together with accrued and unpaid interest thereon, shall become
immediately due and payable upon demand by the Holder at any time on or following the occurrence of any of the following events: 
  
 (i) the sale of all or substantially all of the Company’s assets, or any merger or consolidation of the Company with or into another corporation;
other than a merger or consolidation in which the holders of more than 50% of the shares of capital stock of the Company outstanding immediately prior to such transaction continue to hold (either by the voting securities remaining outstanding or by
their being converted into voting securities of the surviving entity) more than 50% of the total voting power represented by the voting securities of the Company, or such surviving entity, outstanding immediately after such transaction; 

 
 (ii) the inability of the Company to pay its debts as they become due;

 (iii) the dissolution, termination of existence, or appointment of a receiver, trustee or custodian, for
all or any material part of the property of, assignment for the benefit of creditors by, or the commencement of any proceeding by the Company under any reorganization, bankruptcy, arrangement, dissolution or liquidation law or statute of any
jurisdiction, now or in the future in effect; 
  
 (iv) the
execution by the Company of a general assignment for the benefit of creditors; 
  
 (v) the commencement of any proceeding against the Company under any reorganization, bankruptcy, arrangement, dissolution or liquidation law or statute of any jurisdiction, now or in the future in effect, which is not
cured by the dismissal thereof within ninety (90) days after the date commenced; or 
  
 (vi) the appointment of a receiver or trustee to take possession of the property or assets of the Company. 
  
 2. Payment; Prepayment. All payments shall be made in lawful money of the United States of America at such place as the Holder hereof may
from time to time designate in writing to the Company. Payment shall be credited first to the accrued interest then due and payable and the remainder applied to principal. Prepayment of this Note may be made at any time without penalty. 

 
 3. Transfer; Successors and Assigns. The terms and
conditions of this Note shall inure to the benefit of and be binding upon the respective successors and assigns of the parties. This Note may be transferred only upon surrender of the original Note for registration of transfer, duly endorsed, or
accompanied by a duly executed written instrument of transfer in form satisfactory to the Company. Thereupon, a new note for the same principal amount and accrued interest will be issued to, and registered in the name of, the transferee. Interest
and principal are payable only to the registered holder of this Note. 
  
 4. Governing Law. This Note and all acts and transactions pursuant hereto and the rights and obligations of the parties hereto shall be governed, construed and interpreted in accordance with the laws of the State of Florida,
without giving effect to principles of conflicts of law. 
  
 5.
Notices. Any notice required or permitted by this Agreement shall be in writing and shall be deemed sufficient upon receipt, when delivered personally or by courier, overnight delivery service or confirmed facsimile, or 48 hours after
being deposited in the U.S. mail as certified or registered mail with postage prepaid, if such notice is addressed to the party to be notified at such party’s address or facsimile number as set forth below or as subsequently modified by written
notice. 
  
 6. Amendments and Waivers. Any term of
this Note may be amended only with the written consent of the Company and the Holder. Any amendment or waiver effected in accordance with this Section 6 shall be binding upon the Company, each Holder and each transferee of this Note.

  

 - 2- 

 7. Officers and Directors Not Liable. In no event shall any officer or director of the
Company be liable for any amounts due or payable pursuant to this Note. 
  
 8. Security Interest. This Note is secured by all of the assets of the Company in accordance with the Twenty Second Amended and Restated Security Agreement by and between the Company and the Holder dated as of
September 16, 2004 (the “Security Agreement”). In case of an Event of Default (as defined in the Security Agreement), the Holder shall have the rights set forth in the Security Agreement. 
  
 9. Counterparts. This Note may be executed in any number of
counterparts, each of which will be deemed to be an original and all of which together will constitute a single agreement. 
  
 10. Action to Collect on Note. If action is instituted to collect on this Note, the Company promises to pay all costs and expenses,
including reasonable attorney’s fees, incurred in connection with such action. 
  
 11. Loss of Note. Upon receipt by the Company of evidence satisfactory to it of the loss, theft, destruction or mutilation of this Note or any Note exchanged for it, and indemnity satisfactory to the
Company (in case of loss, theft or destruction) or surrender and cancellation of such Note (in the case of mutilation), the Company will make and deliver in lieu of such Note a new Note of like tenor. 
  
 [Remainder of this page intentionally left blank.] 
  

 -3- 

 This Note was entered into as of the date set forth above. 
  

			
	 COMPANY:

	
	 DIGITAL LIGHTWAVE, INC.

		
	 By:
	 	 /s/ Robert F. Hussey

	 	 	Robert F. Hussey
	 	 	Interim President and Chief Executive Officer

  

			
	 AGREED TO AND ACCEPTED:

	
	 OPTEL CAPITAL, LLC

		
	 By:
	 	 /s/ Paul Ragaini

	 Name:
	 	Paul Ragaini
	 	 	 (print)

	 Title:
	 	Chief Financial OfficerExhibit 4.6

 Exhibit 4.6 
  
 THIS SECURITY IS A GLOBAL SECURITY
WITHIN THE MEANING OF THE INDENTURE HEREINAFTER REFERRED TO AND IS
REGISTERED IN THE NAME OF A DEPOSITARY OR A NOMINEE THEREOF. THIS
SECURITY MAY NOT BE EXCHANGED IN WHOLE OR IN PART FOR A
SECURITY REGISTERED, AND NO TRANSFER OF THIS SECURITY IN WHOLE OR IN
PART MAY BE REGISTERED, IN THE NAME OF ANY PERSON OTHER THAN
SUCH DEPOSITARY OR A NOMINEE THEREOF, EXCEPT IN THE LIMITED CIRCUMSTANCES
DESCRIBED IN THE INDENTURE. 
  
 UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE
OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION (“DTC”), TO ISSUER
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
DTC (AND ANY PAYMENT IS MADE TO CEDE & CO. OR TO SUCH OTHER
ENTITY AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC), 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. 
  
 MARRIOTT INTERNATIONAL, INC. 
 5.81% Series
G Note due November 10, 2015 
  

				
	 No. R-1
	  	$	 .00
	CUSIP 571900 AZ 2	  	 	 

  
 MARRIOTT INTERNATIONAL, INC., a corporation duly organized and existing under the laws of Delaware (herein called the “Company,” which term includes any successor Person under the
Indenture hereinafter referred to), for value received, hereby promises to pay to Cede & Co., or registered assigns, the principal sum of              Dollars on November 10,
2015 and to pay interest thereon from November 10, 2005, semi-annually on May 10 and November 10 in each year, commencing May 10, 2006, at the rate of 5.81% per annum, until the principal hereof is paid or made available for
payment. All such payments of principal, interest and premium, if any, shall be paid in immediately available funds. The interest so payable, and punctually paid or duly provided for, on any Interest Payment Date will, as provided in such Indenture,
be paid to the Person in whose name this Security (or one or more Predecessor Securities) is registered at the close of business on the Regular Record Date for such interest, which shall be the April 25 or October 26 (whether or not a
Business Day), as the case may be, next preceding such Interest Payment Date. Any such interest not so punctually paid or duly provided for will forthwith cease to be payable to the Holder on such Regular Record Date and may either be paid to the
Person in whose name this Security (or one or more Predecessor Securities) is registered at the close of business on a Special Record Date for the payment of such Defaulted Interest to be fixed by the Trustee, notice whereof shall be given to
Holders of Securities of this series not less than 10 days prior to such Special Record Date, or be paid at any time in any other lawful manner not inconsistent with the requirements of any securities exchange on which the Securities of this
series may be listed, and upon such notice as may be required by such exchange, all as more fully provided in said Indenture. 

 Payment of the principal of (and premium, if any) and interest on this Security will be made at the
office or agency of the Trustee maintained for that purpose in Dallas, Texas, 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; provided,
however, that payment of interest may be made by check mailed to the address of the Person entitled thereto as such address shall appear in the Security Register; and provided, further, that notwithstanding the foregoing, the Person in
whose name this Security is registered may elect to receive payments of interest on this Security (other than at Maturity) by electronic funds transfer of immediately available funds to an account maintained by such Person, provided such Person so
elects by giving written notice to a Paying Agent designating such account, no later than the April 10 or the October 10 immediately preceding the May 10 or November 10 Interest Payment Date, as the case may be. Unless such
designation is revoked by such Person, any such designation made by such Person with respect to such Securities shall remain in effect with respect to any future payments with respect to such Securities payable to such Person. 
  
 Reference is hereby made to the further provisions of this Security set forth
on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. 
  
 Unless the certificate of authentication hereon has been executed by the Trustee referred to on the reverse hereof by manual signature, this Security
shall not be entitled to any benefit under the Indenture or be valid or obligatory for any purpose. 
  
 IN WITNESS WHEREOF, the Company has caused this instrument to be duly executed under its corporate seal.

  

					
	Dated:                     , 2006	 	 	 	 
	 	 	MARRIOTT INTERNATIONAL, INC.
			
	 	 	By:	 	  

	 	 	 	 	Carolyn B. Handlon
	 	 	 	 	Vice President and Treasurer
	Attest:	 	 	 	 
			
	  

	 	 	 	 
	Assistant Secretary	 	 	 	 

  

 2 

 This is one of the Securities of the series designated therein referred to in the within-mentioned
Indenture. 
  

			
	 JPMORGAN CHASE BANK, N.A.
 (formerly known as The Chase Manhattan Bank),
 as Trustee

		
	 By:
	 	  

	 	 	 Francine Springer

	 	 	 Authorized Officer

  

 3 

 [Reverse of Security] 
  
 This Security is one of a duly authorized issue of securities of the Company (herein called the “Securities”),
issued and to be issued in one or more series under an Indenture, dated as of November 16, 1998 (herein called the “Indenture”, which term shall have the meaning assigned to it in such instrument), between the Company and JPMorgan
Chase Bank, N.A., formerly known as The Chase Manhattan Bank, as Trustee (herein called the “Trustee”, which term includes any successor trustee under the Indenture), and reference is hereby made to the Indenture for a statement of the
respective rights, limitations of rights, duties and immunities thereunder of the Company, the Trustee and the Holders of the Securities and of the terms upon which the Securities are, and are to be, authenticated and delivered. This Security is one
of the series designated on the face hereof, limited initially in aggregate principal amount to $             . The Company may subsequently issue additional securities as part of
this series of Securities under the Indenture. 
  
 The Company
may, at its option, redeem the Securities in whole or in part at any time at a Redemption Price equal to the greater of (A) 100% of the principal amount of the Securities to be redeemed, plus accrued interest to the Redemption Date, and
(B) as determined by the Independent Investment Banker (as defined below), the sum of the present values of the principal amount of, and remaining scheduled payments of interest on, the Securities to be redeemed (not including any interest
accrued as of the Redemption Date) discounted to the Redemption Date on a semi-annual basis at the Treasury Rate (as defined below) plus 20 basis points plus accrued interest to, but not including, the redemption date for the Securities. 

 
 The Redemption Price will be calculated assuming a 360-day year consisting
of twelve 30-day months. 
  
 The Company will mail notice of any
redemption at least 30 days but not more than 60 days before the Redemption Date to each Holder of the Securities to be redeemed. 
  
 Unless the Company defaults in payment of the Redemption Price, on and after the Redemption Date, interest will cease to accrue on the Securities or
portions of the Securities called for redemption. 
  
 In the event
of redemption of this Security in part only, a new Security or Securities of this series and of like tenor for the unredeemed portion hereof will be issued in the name of the Holder hereof upon the cancellation hereof. 
  
 “Comparable Treasury Issue” means the United States Treasury
security selected by the Independent Investment Banker as having a maturity comparable to the remaining term of the Securities that would be used, at the time of selection and in accordance with customary financial practice, in pricing new issues of
corporate debt securities of comparable maturity to the remaining term of the Securities. 
  
 “Comparable Treasury Price” means, with respect to any Redemption Date, (1) the average of the Reference Treasury Dealer Quotations for that Redemption Date, after excluding 

  

 4 

 
the highest and lowest of the Reference Treasury Dealer Quotations, or (2) if the Trustee obtains fewer than three Reference Treasury Dealer Quotations,
the average of all Reference Treasury Dealer Quotations so received. 
  
 “Independent Investment Banker” means one of the Reference Treasury Dealers appointed by the Trustee after consultation with the Company. 
  
 “Reference Treasury Dealer” means (a) each of Deutsche Bank Securities, Inc., Barclays Capital Inc.
and Merrill Lynch Government Securities Inc. and its successors, unless it ceases to be a primary U.S. government securities dealer in New York City (a “Primary Treasury Dealer”), in which case the Company shall substitute another Primary
Treasury Dealer, and (b) any other Primary Treasury Dealer selected by the Company. 
  
 “Reference Treasury Dealer Quotations” means, with respect to each Reference Treasury Dealer and any Redemption Date, the average, as determined by the Trustee, of the bid and asked prices for the
Comparable Treasury Issue (expressed in each case as a percentage of its principal amount) quoted in writing to the Trustee by that Reference Treasury Dealer at 5:00 p.m., New York City time, on the third business day preceding that Redemption Date.

  
 “Treasury Rate” means, with respect to any
Redemption Date, the rate per year equal to the semiannual equivalent yield to maturity of the Comparable Treasury Issue, calculated on the third business day preceding the Redemption Date, assuming a price for the Comparable Treasury Issue
(expressed as a percentage of its principal amount) equal to the Comparable Treasury Price for that Redemption Date. 
  
 The Indenture contains provisions for defeasance at any time of the entire indebtedness of this Security or certain restrictive covenants and Events of
Default with respect to this Security, in each case upon compliance with certain conditions set forth in the Indenture. 
  
 If an Event of Default with respect to Securities of this series shall occur and be continuing, the principal of the Securities of this series may be
declared due and payable in the manner and with the effect provided in the Indenture. 
  
 The Indenture permits, with certain exceptions as therein provided, the amendment thereof and the modification of the rights and obligations of the Company and the rights of the Holders of the Securities of each
series to be affected under the Indenture at any time by the Company and the Trustee with the consent of the Holders of 50% in principal amount of the Securities at the time Outstanding of each series to be affected. The Indenture also contains
provisions permitting the Holders of specified percentages in principal amount of the Securities of each series at the time Outstanding, on behalf of the Holders of all Securities of such series, to waive compliance by the Company with certain
provisions of the Indenture and certain past defaults under the Indenture and their consequences. Any such consent or waiver by the Holder of this Security shall be conclusive and binding upon such Holder and upon all future Holders of this Security
and of any Security issued upon the registration of transfer hereof or in exchange herefor or in lieu hereof, whether or not notation of such consent or waiver is made upon this Security. 
  

 5 

 As provided in and subject to the provisions of the Indenture, the Holder of this Security shall not have
the right to institute any proceeding with respect to the Indenture or for the appointment of a receiver or trustee or for any other remedy thereunder, unless such Holder shall have previously given the Trustee written notice of a continuing Event
of Default with respect to the Securities of this series, the Holders of not less than 25% in principal amount of the Securities of this series at the time Outstanding shall have made written request to the Trustee to institute proceedings in
respect of such Event of Default as Trustee and offered the Trustee reasonable indemnity, and the Trustee shall not have received from the Holders of a majority in principal amount of Securities of this series at the time Outstanding a direction
inconsistent with such request, and shall have failed to institute any such proceeding, for 60 days after receipt of such notice, request and offer of indemnity. The foregoing shall not apply to any suit instituted by the Holder of this Security for
the enforcement of any payment of principal hereof or any premium or interest hereon on or after the respective due dates expressed herein. 
  
 No reference herein to the Indenture and no provision of this Security or of the Indenture shall alter or impair the obligation of the Company, which is
absolute and unconditional, to pay the principal of and any premium and interest on this Security at the times, place and rate, and in the coin or currency, herein prescribed. 
  
 As provided in the Indenture and subject to certain limitations therein set forth, the transfer of this Security is
registrable in the Security Register, upon surrender of this Security for registration of transfer at the office or agency of the Trustee in any place where the principal of and any premium and interest on this Security are payable, duly endorsed
by, or accompanied by a written instrument of transfer in form satisfactory to the Company and the Security Registrar duly executed by, the Holder hereof or his attorney duly authorized in writing, and thereupon one or more new Securities of this
series and of like tenor, of authorized denominations and for the same aggregate principal amount, will be issued to the designated transferee or transferees. 
  

The Securities of this series are issuable only in registered form without coupons in denominations of $1,000 and integral multiples of $1,000 in
excess thereof. As provided in the Indenture and subject to certain limitations therein set forth, Securities of this series are exchangeable for a like aggregate principal amount of Securities of this series and of like tenor of a different
authorized denomination, as requested by the Holder surrendering the same. 
  
 No service charge shall be made for any such registration of transfer or exchange, but the Company may require payment of a sum sufficient to cover any tax or other governmental charge payable in connection therewith.

  
 Prior to due presentment of this Security for registration of
transfer, the Company, the Trustee and any agent of the Company or the Trustee may treat the Person in whose name this Security is registered as the owner hereof for all purposes, whether or not this Security be overdue, and neither the Company, the
Trustee nor any such agent shall be affected by notice to the contrary. 
  
 All terms used in this Security which are defined in the Indenture shall have the meanings assigned to them in the Indenture. 
  

 6 

  
 The following abbreviations, when used in the inscription on the face of the within Security, shall be construed as though they were written out in full according to applicable laws or regulations. 
  

							
	 TEN COM
	 	—	 	as tenants in common	  	UNIF GIFT MIN Act
–                    Custodian                
    
	TEN ENT	 	—	 	as tenants by the entireties	  	(Cust)                 (Minor)
	JT TEN	 	—	 	as joint tenants with right of
survivorship and not as
tenants in common	  	 under Uniform Gifts to
 Minors Act                     
 (State)

  
 Additional
abbreviations may also be used though not in the above list 
  

  
 FOR VALUE RECEIVED the undersigned hereby sells, assigns and transfers unto 
  
 PLEASE INSERT SOCIAL SECURITY OR OTHER 
 IDENTIFYING NUMBER OF ASSIGNEE 
  

	
	 
	 
	 

  
                                       
                                        
                                        
                                        
                                        
                                        
                    
 (Name and Address of
Assignee, including zip code, must be printed or typewritten) 
  
                                       
                                        
                                        
                                        
                                        
                                        
                    
 the
within Security, and all rights thereunder, hereby irrevocably constituting and appointing 
  
                                       
                                        
                                        
                                        
                                        
                                        
  Attorney 
 to transfer said Security on the books of the Company, with full power of substitution in the
premises. 
  

	Dated:	

  

	
	

  
 NOTICE: The
signature to this assignment must correspond with the name as it appears upon the face of the within Security in every particular, without alteration or enlargement of any change whatever. 
  

 7

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