Document:

Employee Stock Purchase Plan, as amended

 EXHIBIT 4.2 
  

MICRO THERAPEUTICS, INC. 
  
 FIFTH AMENDED AND RESTATED 
 EMPLOYEE
STOCK PURCHASE PLAN 
  
 The MICRO THERAPEUTICS, INC. EMPLOYEE
STOCK PURCHASE PLAN (the “Plan”) was adopted effective February 18, 1997, was amended May 29, 1998, May 27, 1999, June 1, 2002 and May 20, 2004, and is hereby amended and restated by MICRO THERAPEUTICS, INC., a Delaware corporation (the
“Company”) to be effective on May 26, 2005 (the “Amendment Date”). 
  
 1. 
  
 PURPOSE OF THE
PLAN 
  
 1.1 Purpose. The Company has
determined that it is in its best interest to provide incentives to attract and retain employees and to increase employee morale by providing a program through which employees of the Company, and of such of the Company’s subsidiaries as the
Company’s Board of Directors (the “Board of Directors”) may from time to time designate (each a “Designated Subsidiary”, and collectively, “Designated Subsidiaries”), may acquire a proprietary interest in the
Company through the purchase of shares of the common stock of the Company (“Company Stock”). The Plan was established by the Company to permit employees to subscribe for and purchase directly from the Company shares of the Company Stock at
a discount from the market price, and to pay the purchase price in installments by payroll deductions. The Plan is intended to qualify as an “employee stock purchase plan” under Section 423 of the Internal Revenue Code of 1986, as amended
from time to time (the “Code”). The provisions of the Plan are to be construed in a manner consistent with the requirements of Section 423 of the Code. The Plan is not intended to be an employee benefit plan under the Employee Retirement
Income Security Act of 1974, and therefore is not required to comply with that Act. 
  
 2. 
  
 DEFINITIONS

  
 2.1 Amendment Date.
“Amendment Date” means May 26, 2005. 
  
 2.2
Compensation. “Compensation” means the amount indicated on the Form W-2, including any elective deferrals with respect to a plan of the Company qualified under either Section 125 or Section 401(a) of the Code, issued to an
employee by the Company. 
  
 2.3 Employee.
“Employee” means each person currently employed by the Company or any of its Designated Subsidiaries, any portion of whose income is subject to withholding of income tax or for whom Social Security retirement contributions are made by the
Company or any Designated Subsidiary. 
  
 2.4
Effective Date. “Effective Date” means the effective date of the Company’s first Registration Statement filed with the Securities and Exchange Commission registering Company Stock. 
  
 2.5 5% Owner. “5% Owner” means an Employee
who, immediately after the grant of any rights under the Plan, would own Company Stock or hold outstanding options to purchase Company Stock possessing 5% or more of the total combined voting power of all classes of stock of the Company. For
purposes of this Section, the ownership attribution rules of Code Section 425(d) shall apply. 
  

 2.6 Grant Date. “Grant Date” means the first day of each Offering Period
(July 1 and January 1) under the Plan. However, for the first Offering Period, the Grant Date shall be the Effective Date. 
  
 2.7 Participant. “Participant” means an Employee who has satisfied the eligibility requirements of Section 3.1 and has
become a participant in the Plan in accordance with Section 3.2. 
  
 2.8 Plan Year. “Plan Year” means the twelve consecutive month period ending on the last day of December. 
  
 2.9 Offering Period. “Offering Period” means the six-month periods from July 1 through December 31 and January 1 through
June 30 of each Plan Year. However, the first Offering Period shall commence on the Effective Date and end on June 30, 1997, regardless of whether such initial Offering Period is more or less than six months. 
  
 2.10 Purchase Date. “Purchase Date” means the
last day of each Offering Period (December 31 or June 30). 
  
 3. 
  
 ELIGIBILITY AND PARTICIPATION

  
 3.1 Eligibility. Each Employee of
the Company, or any Designated Subsidiary, who, on the Grant Date, is customarily engaged on a regularly-scheduled basis of more than twenty (20) hours per week for more than five (5) months per calendar year and who has been employed for at least
ninety (90) days (or, for the initial Offering Period only, such Employees who are employed on the Effective Date) in the rendition of personal services to the Company, or any Designated Subsidiary, may become a Participant in the Plan on the Grant
Date coincident with or next following his satisfaction of such requirements of employment with the Company or any Designated Subsidiary. 
  
 3.2 Participation. An Employee who has satisfied the eligibility requirements of Section 3.1 may become a Participant in the Plan
upon his completion and delivery to the Human Resources Department of the Company of a stock purchase agreement provided by the Company (the “Stock Purchase Agreement”) authorizing payroll deductions. Payroll deductions for a Participant
shall commence on the Grant Date coincident with or next following the filing of the Participant’s Stock Purchase Agreement and shall remain in effect until revoked by the Participant by the filing of a notice of withdrawal from the Plan under
Article VIII or by the filing of a new Stock Purchase Agreement providing for a change in the Participant’s payroll deduction rate under Section 5.2. 
  
 3.3 Special Rules. Under no circumstances shall 
  
 (a) A 5% Owner be granted a right to purchase Company Stock under the Plan; 
  
 (b) A Participant be entitled to purchase Company
Stock under the Plan which, when aggregated with all other employee stock purchase plans of the Company, exceed an amount equal to the Aggregate Maximum. “Aggregate Maximum” means an amount equal to $25,000 worth of Company Stock
(determined using the fair market value of such Company Stock at each applicable Grant Date) during each calendar year; or 
  
 (c) The number of shares of Company Stock purchasable by a Participant on any Purchase Date exceed 2,500 shares, subject to
periodic adjustments under Section 10.4. 
  

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 4. 
  
 OFFERING PERIODS 
  
 4.1 Offering Periods. The initial grant of the right to purchase Company Stock under the Plan shall occur on the Effective Date and
terminate on June 30, 1997. Thereafter, the Plan shall provide for Offering Periods commencing on each Grant Date and terminating on the next following Purchase Date. 
  
 5. 
  
 PAYROLL DEDUCTIONS 
  
 5.1 Participant Election. Upon completion of the Stock Purchase Agreement, each Participant shall designate the amount of payroll
deductions to be made from his or her paycheck to purchase Company Stock under the Plan. The amount of payroll deductions shall be designated in whole percentages of Compensation or in whole dollar amounts, not to exceed 20% of Compensation. The
amount so designated upon the Stock Purchase Agreement shall be effective as of the next Grant Date and shall continue until terminated or altered in accordance with Section 5.2 below. 
  
 5.2 Changes in Election. A Participant may terminate
participation in the Plan at any time prior to the close of an Offering Period as provided in Article 8. A Participant may decrease or increase the rate of payroll deductions one time during any Offering Period by completing and delivering to the
Human Resources Department of the Company a new Stock Purchase Agreement setting forth the desired change. A Participant may also terminate payroll deductions and have accumulated deductions for the Offering Period applied to the purchase of Company
Stock as of the next Purchase Date by completing and delivering to the Human Resources Department a new Stock Purchase Agreement setting forth the desired change. Any change under this Section shall become effective on the next payroll period (to
the extent practical under the Company’s payroll practices) following the delivery of the new Stock Purchase Agreement. 
  
 5.3 Participant Accounts. The Company shall establish and maintain a separate account (“Account”) for each Participant. The
amount of each Participant’s payroll deductions shall be credited to his Account. No interest will be paid or allowed on amounts credited to a Participant’s Account. All payroll deductions received by the Company under the Plan are general
corporate assets of the Company and may be used by the Company for any corporate purpose. The Company is not obligated to segregate such payroll deductions. 
  
 6. 
  
 GRANT OF PURCHASE RIGHTS 
  
 6.1 Right to Purchase Shares. On each Grant Date, each Participant shall be granted a right to purchase at the price determined under Section 6.2 that number of shares and partial shares of
Company Stock that can be purchased or issued by the Company based upon that price with the amounts held in his Account, subject to the limits set forth in Section 3.3. In the event that there are amounts held in a Participant’s Account that
are not used to purchase Company Stock, such amounts shall remain in the Participant’s Account and shall be eligible to purchase Company Stock in any subsequent Offering Period. 
  
 6.2 Purchase Price. The purchase price for any Offering Period shall be the lesser of:

  
 (a) 85% of the Fair Market Value of
Company Stock on the Grant Date; or 
  
 (b) 85% of the Fair Market Value of Company Stock on the Purchase Date. 
  

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 6.3 Fair Market Value. “Fair Market Value” means for the initial Grant
Date (which is the Effective Date), the price per share at which the Common Stock is to be sold to the public in the initial public offering of the Common Stock. For any subsequent date thereafter, “Fair Market Value” shall mean the value
of one share of Company Stock, determined as follows: 
  
 (a) If the Company Stock is then listed or admitted to trading on the Nasdaq National Market System or a stock exchange which reports closing sale prices, the Fair Market Value shall be the closing sale price on the date of valuation
on the Nasdaq National Market System or principal stock exchange on which the Company Stock is then listed or admitted to trading, or, if no closing sale price is quoted or no sale takes place on such day, then the Fair Market Value shall be the
closing sale price of the Company Stock on the Nasdaq National Market System or such exchange on the next preceding day on which a sale occurred. 
  
 (b) If the Company Stock is not then listed or admitted to trading on the Nasdaq National Market System or a stock exchange which
reports closing sale prices, the Fair Market Value shall be the average of the closing bid and asked prices of the Company Stock in the over-the-counter market on the date of valuation. 
  
 (c) If neither (a) nor (b) is applicable as of the date of valuation, then the Fair Market Value
shall be determined by the Administrator in good faith using any reasonable method of valuation, which determination shall be conclusive and binding on all interested parties. 
  
 7. 
  
 PURCHASE OF STOCK 
  
 7.1 Purchase of Company Stock. Absent an election by the Participant to terminate and have his or her Account returned, on each
Purchase Date, the Plan shall purchase on behalf of each Participant the maximum number of whole shares of Company Stock at the purchase price determined under Section 6.2 above as can be purchased with the amounts held in each Participant’s
Account. In the event that there are amounts held in a Participant’s Account that are not used to purchase Company Stock, all such amounts shall be held in the Participant’s Account and carried forward to the next Offering Period.

  
 7.2 Delivery of Company Stock.

  
 (a) Company Stock acquired under the
Plan may either be issued directly to Participants or may be issued to a contract administrator (“Administrator”) engaged by the Company to administer the Plan under Article 9. If the Company Stock is issued in the name of the
Administrator, all Company Stock so issued (“Plan Held Stock”) shall be held in the name of the Administrator for the benefit of the Plan. The Administrator shall maintain accounts for the benefit of the Participants which shall reflect
each Participant’s interest in the Plan Held Stock. Such accounts shall reflect the number of whole and partial shares of Company Stock that are being held by the Administrator for the benefit of each Participant. 
  
 (b) Any Participant may elect to have the Company
Stock purchased under the Plan from his or her Account be issued directly to the Participant. Any election under this paragraph shall be on the forms provided by the Company and shall be issued in accordance with paragraph (c) below. 
  
 (c) In the event that Company Stock under the Plan is
issued directly to a Participant, the Company will deliver to each Participant a stock certificate or certificates issued in his name for the number of shares of Company Stock purchased as soon as practicable after the Purchase Date. Where Company
Stock is issued under this paragraph, only full shares of stock will be issued to a Participant. The time of issuance and delivery of shares may be postponed for such period as may be 

  

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necessary to comply with the registration requirements under the Securities Act of 1933, as amended, the listing requirements of any securities exchange on
which the Company Stock may then be listed, or the requirements under other laws or regulations applicable to the issuance or sale of such shares. 
  
 8. 
  
 WITHDRAWAL 
  
 8.1 In Service Withdrawals. At any time prior to the Purchase Date of an Offering Period, any Participant may withdraw the amounts held in his Account by executing and delivering to the Human
Resources Department for the Company written notice of withdrawal on the form provided by the Company. In such a case, the entire balance of the Participant’s Account shall be paid to the Participant, without interest, as soon as is
practicable. Upon such notification, the Participant shall cease to participate in the Plan for the remainder of the Offering Period, and for the immediately following Offering Period in which the notice is given. Any Employee who has withdrawn
under this Section shall be excluded from participation in the Plan for the remainder of the Offering Period and for the immediately following Offering Period, but may then be reinstated as a participant for a subsequent Offering Period by executing
and delivering a new Stock Purchase Agreement to the Human Resources Department of the Company. 
  
 8.2 Termination of Employment. 
  
 (a) In the event that a Participant’s employment with the Company terminates for any reason, the Participant shall cease to
participate in the Plan on the date of termination. As soon as is practical following the date of termination, the entire balance of the Participant’s Account shall be paid to the Participant or his beneficiary, without interest. 
  
 (b) A Participant may file a written designation of a
beneficiary who is to receive any shares of Company Stock purchased under the Plan or any cash from the Participant’s Account in the event of his or her death subsequent to a Purchase Date, but prior to delivery of such shares and cash. In
addition, a Participant may file a written designation of a beneficiary who is to receive any cash from the Participant’s Account under the Plan in the event of his death prior to a Purchase Date under paragraph (a) above. 
  
 (c) Any beneficiary designation under paragraph (b)
above may be changed by the Participant at any time by written notice. In the event of the death of a Participant, the Committee may rely upon the most recent beneficiary designation it has on file as being the appropriate beneficiary. In the event
of the death of a Participant where no valid beneficiary designation exists or the beneficiary has predeceased the Participant, the Committee shall deliver any cash or shares of Company Stock to the executor or administrator of the estate of the
Participant, or if no such executor or administrator has been appointed to the knowledge of the Committee, the Committee, in its sole discretion, may deliver such shares of Company Stock or cash to the spouse or any one or more dependents or
relatives of the Participant, or if no spouse, dependent or relative is known to the Committee, then to such other person as the Committee may designate. 
  
 9. 
  
 PLAN ADMINISTRATION 
  
 9.1 Plan Administration. 
  
 (a) Authority to control and manage the operation and administration of the Plan shall be vested in the Board of Directors (the “Board”) for the Company, or a committee 

  

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(“Committee”) thereof. The Board or Committee shall have all powers necessary to supervise the administration of the Plan and control its
operations. 
  
 (b) In addition to any
powers and authority conferred on the Board or Committee elsewhere in the Plan or by law, the Board or the Committee shall have the following powers and authority: 
  
 (i) To designate agents to carry out responsibilities relating to the Plan; 
  
 (ii) To administer, interpret, construe and apply
this Plan and to answer all questions which may arise or which may be raised under this Plan by a Participant, his beneficiary or any other person whatsoever; 
  

(iii) To establish rules and procedures from time to time for the conduct of its business and for the administration and
effectuation of its responsibilities under the Plan; and 
  
 (iv) To perform or cause to be performed such further acts as it may deem to be necessary, appropriate, or convenient for the operation of the Plan. 
  
 (c) Any action taken in good faith by the Board or
Committee in the exercise of authority conferred upon it by this Plan shall be conclusive and binding upon a Participant and his beneficiaries. All discretionary powers conferred upon the Board shall be absolute. 
  
 9.2 Limitation on Liability. No Employee of the Company
nor member of the Board or Committee shall be subject to any liability with respect to his duties under the Plan unless the person acts fraudulently or in bad faith. To the extent permitted by law, the Company shall indemnify each member of the
Board or Committee, and any other Employee of the Company with duties under the Plan who was or is a party, or is threatened to be made a party, to any threatened, pending or completed proceeding, whether civil, criminal, administrative, or
investigative, by reason of the person’s conduct in the performance of his duties under the Plan. 
  
 10. 
  
 COMPANY STOCK 
  
 10.1
Limitations on Purchase of Shares. The maximum number of shares of Company Stock that shall be made available for sale under the Plan shall be 750,000 shares, subject to adjustment under Section 10.4 below. The shares of Company Stock
to be sold to Participants under the Plan will be issued by the Company. If the total number of shares of Company Stock that would otherwise be issuable pursuant to rights granted pursuant to Section 6.1 of the Plan at the Purchase Date exceeds the
number of shares then available under the Plan, the Company shall make a pro rata allocation of the shares remaining available in as uniform and equitable manner as is practicable. In such event, the Company shall give written notice of such
reduction of the number of shares to each participant affected thereby and any unused payroll deductions shall be returned to such participant if necessary.  
  
 10.2 Company Stock. The Participant will have no interest or voting right in shares to be purchased
under Section 6.1 of the Plan until such shares have been purchased. 
  
 10.3 Registration of Company Stock. Shares to be delivered to a Participant under the Plan will be registered in the name of the Participant unless designated otherwise by the Participant. 

  

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 10.4 Changes in Capitalization of the Company. Subject to any required action by the
stockholders of the Company, the number of shares of Company Stock covered by each right under the Plan which has not yet been exercised and the number of shares of Company Stock which have been authorized for issuance under the Plan but have not
yet been placed under rights or which have been returned to the Plan upon the cancellation of a right, as well as the Purchase Price per share of Company Stock covered by each right under the Plan which has not yet been exercised, shall be
proportionately adjusted for any increase or decrease in the number of issued shares of Company Stock resulting from a stock split, stock dividend, spin-off, reorganization, recapitalization, merger, consolidation, exchange of shares or the like.
Such adjustment shall be made by the Board of Directors for the Company, whose determination in that respect shall be final, binding and conclusive. Except as expressly provided herein, no issue by the Company of shares of stock of any class, or
securities convertible into shares of stock of any class, shall affect, and no adjustment by reason thereof shall be made with respect to, the number or price of shares of Company Stock subject to any right granted hereunder. 
  
 10.5 Merger of Company. In the event that the Company at
any time proposes to merge into, consolidate with or enter into any other reorganization pursuant to which the Company is not the surviving entity (including the sale of substantially all of its assets or a “reverse” merger in which the
Company is the surviving entity), the Plan shall terminate, unless provision is made in writing in connection with such transaction for the continuance of the Plan and for the assumption of rights theretofore granted, or the substitution for such
rights of new rights covering the shares of a successor corporation, with appropriate adjustments as to number and kind of shares and prices, in which event the Plan and the rights theretofore granted or the new rights substituted therefor, shall
continue in the manner and under the terms so provided. If such provision is not made in such transaction for the continuance of the Plan and the assumption of rights theretofore granted or the substitution for such rights of new rights covering the
shares of a successor corporation, then the Board or the Committee shall cause written notice of the proposed transaction to be given to the persons holding rights not less than 10 days prior to the anticipated effective date of the proposed
transaction, and, concurrent with the effective date of the proposed transaction, such rights shall be exercised automatically in accordance with Section 7.1 as if such effective date were a Purchase Date of the applicable Offering Period unless a
Participant withdraws from the Plan as provided in Section 8.1. 
  
 11. 
  
 MISCELLANEOUS MATTERS

  
 11.1 Amendment and Termination.
The Plan shall terminate ten (10) years after the Effective Date. Since future conditions affecting the Company cannot be anticipated or foreseen, the Company reserves the right to amend, modify, or terminate the Plan at any time. Upon termination
of the Plan, all benefits shall become payable immediately. Notwithstanding the foregoing, no such amendment or termination shall affect rights previously granted, nor may an amendment make any change in any right previously granted which adversely
affects the rights of any Participant. In addition, no amendment may be made without prior approval of the stockholders of the Company if such amendment would: 
  
 (a) Increase the number of shares of Company Stock that may be issued under the Plan; 
  
 (b) Materially modify the requirements as to
eligibility for participation in the Plan; or 
  
 (c) Materially increase the benefits which accrue to Participants under the Plan. 
  

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 11.2 Stockholder Approval. Continuance of the Plan and the effectiveness of any
right granted hereunder shall be subject to approval by the stockholders of the Company, within twelve months before or after the date the Plan is adopted by the Board. 
  
 11.3 Benefits Not Alienable. Benefits under the Plan may not be assigned or alienated, whether
voluntarily or involuntarily. Any attempt at assignment, transfer, pledge or other disposition shall be without effect, except that the Company may treat such act as an election to withdraw funds in accordance with Article VIII. 

 
 11.4 No Enlargement of Employee Rights. This Plan is
strictly a voluntary undertaking on the part of the Company and shall not be deemed to constitute a contract between the Company and any Employee or to be consideration for, or an inducement to, or a condition of, the employment of any Employee.
Nothing contained in the Plan shall be deemed to give the right to any Employee to be retained in the employ of the Company or to interfere with the right of the Company to discharge any Employee at any time.  
  
 11.5 Governing Law. To the extent not preempted by
Federal law, all legal questions pertaining to the Plan shall be determined in accordance with the laws of the State of Delaware. 
  
 11.6 Non-business Days. When any act under the Plan is required to be performed on a day that falls on a Saturday, Sunday or legal
holiday, that act shall be performed on the next succeeding day which is not a Saturday, Sunday or legal holiday. Notwithstanding the above, Fair Market Value shall be determined in accordance with Section 6.3. 
  
 11.7 Compliance With Securities Laws. Notwithstanding
any provision of the Plan, the Committee shall administer the Plan in such a way to ensure that the Plan at all times complies with any requirements of Federal Securities Laws. For example, affiliates may be required to make irrevocable elections in
accordance with the rules set forth under Section 16b-3 of the Securities Exchange Act of 1934. 
  

 8Secured Promissory Note issued by Digital Lightwave, Inc

 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 
  

			
	 $475,000.00
	 	June 29, 2005
	 	 	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 Four
Hundred Seventy Five Thousand Dollars ($475,000.00). 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 September 30, 2005.

  
 (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 Officer

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