AMENDMENT TO THE

COHERENT COMMUNICATIONS SYSTEMS CORPORATION

AMENDED AND RESTATED 1982 STOCK OPTION PLAN

	**WHEREAS,** Coherent Communications Systems Corporation ("Coherent") has heretofore established the Coherent Communications Systems Corporation  Amended and Restated 1982 Stock Option Plan (the "Plan") forthe benefit of employees of Coherent Communications Systems Corporation and its subsidiaries;

	**WHEREAS,** Coherent was acquired by Tellabs, Inc. ("Tellabs") in a merger on August 3, 1998, and Coherent subsequently merged into Tellabs Operations, Inc. (the "Corporation");

	**WHEREAS,**the Board of Directors of Tellabs deems it desirable to make certain amendments to the Plan relating to the vesting of options and/or the post-employment exercise period in the event of the death, disability, orretirement of an option holder, or a change in control of Tellabs;

	**WHEREAS,** the Board of Directors has considered the recommendations; and

	**WHEREAS,** the Board of Directors of the Corporation has approved this Amendment to the Plan.

	**NOW, THEREFORE, BE IT RESOLVED,** that the Plan is hereby amended, effective June 30, 2000, as follows:

Under Section 2 of the Plan, the following definition of "Change in Control" shall be added:

	(f)	"Change in Control" means the first to occur of:

		(1)	Any "person" (as defined in Section 13(d) and 14(d) of the Securities Exchange Act of 1934, as amended (the "Exchange Act")), excluding for this purpose, Tellabs, Inc. ("Tellabs") or anysubsidiary of Tellabs, or any employee benefit plan of Tellabs or any subsidiary of Tellabs, or any person or entity organized, appointed or established by Tellabs for or pursuant to the terms of any such plan which acquires beneficial ownership of votingsecurities of Tellabs, is or becomes the "beneficial owner" (as defined in Rule 13d-3 under the Exchange Act), directly or indirectly of securities of Tellabs representing 20% or more of the combined voting power of Tellabs's thenoutstanding securities; provided, however, that no Change in Control will be deemed to have occurred as a result of a change in ownership percentage resulting solely from an acquisition of securities by Tellabs; and provided further that no Change inControl will be deemed to have occurred if a person inadvertently acquires an ownership interest of 20% or more but then promptly reduces that ownership interest below 20%;

		(2)	During any two consecutive years (not including any period beginning prior to June 30, 2000), individuals who at the beginning of such two-year period constitute the Board of Directors of Tellabs and any new director(except for a director designated by a person who has entered into an agreement with Tellabs to effect a transaction described elsewhere in this definition of Change in Control) whose election by the Board or nomination for election by Tellabs'stockholders was approved by a vote of at least two-thirds of the directors then still in office who either were directors at the beginning of the period or whose election or nomination for election was previously so approved (such individuals and anysuch new director, the "Incumbent Board") cease for any reason to constitute at least a majority of the Board;

		(3)	Consummation of a reorganization, merger or consolidation or sale or other disposition of all or substantially all of the assets of Tellabs (a "Business Combination"), in each case, unless, following suchBusiness Combination, (i) all or substantially all of the individuals and entities who were the beneficial owners of outstanding voting securities of Tellabs immediately prior to such Business Combination beneficially own, directly or indirectly,more than 50% of the combined voting power of the then outstanding voting securities entitled to vote generally in the election of directors, as the case may be, of the company resulting from such Business Combination (including, without limitation, acompany which as a result of such transaction owns Tellabs or all or substantially all of Tellabs' assets either directly or through one or more subsidiaries) in substantially the same proportions as their ownership, immediately prior to suchBusiness Combination of the outstanding voting securities of Tellabs; (ii) no person (excluding any company resulting from such Business Combination or any employee benefit plan (or related trust) of Tellabs or such company resulting from suchBusiness Combination) beneficially owns, directly or indirectly, 20% or more of, respectively, the then combined voting power of the then outstanding voting securities of such company except to the extent that such ownership existed prior to the BusinessCombination; and (iii) at least a majority of the members of the board of directors of the company resulting from such Business Combination were members of the Incumbent Board at the time of the execution of the initial agreement, or of the action ofthe Board, providing for such Business Combination; or

		(4)	Approval by the stockholders of Tellabs of a complete liquidation or dissolution of Tellabs.	

 

Under Section 2 of the Plan, the following definition of "Disability" shall be added:

	(i)	"Disability" shall have the meaning ascribed to such term in Section 22(e)(3) of the Code.

Section 10 shall be amended in its entirety to read as follows:

10.	TERMINATION OF EMPLOYMENT.  Except as set forth in Section 10A with respect to the effect of a Change in Control or except as the Committee may otherwise expressly provide in the Stock Option Agreement, the following rulesshall apply upon termination of the Optionee's employment with the Corporation and all Subsidiaries:    

	(a)	Except as set forth in subsections (b), (c), (d) and (e)  below, in the event of termination (voluntary or involuntary) for any reason of the holder's employment by the Corporation, any unexercised Option shall beexercisable by the Optionee at any time within 30 days after the date of such termination but only to the extent such Option was exercisable on the date of such termination.  In no event shall such unexercised Option be exercisable after theexpiration of its term.

	(b)	In the event of termination of employment due to the death the Optionee, each Option held by the Optionee shall become exercisable in full and may be exercised at any time prior to the expiration date of the Option or withinone year after the date of the Optionee's death, whichever period is shorter.

	(c)	In the event of termination of employment due to the Disability of  the Optionee, each Option held by the Optionee may, to the extent exercisable at the time of termination of employment, be exercised at any time prior tothe expiration date of the Option or within three years after the date of the Optionee's termination of employment, whichever period is shorter.

	(d)	In the event of termination of employment due to the retirement of the Optionee on or after attaining age 55, all or a portion of each Option held by the Optionee, to the extent not then exercisable, shall become exercisablein accordance with the schedule set forth below based upon one point for the Optionee's attained age and one point for each year of continuous service with the Corporation or its Subsidiaries as of the date of retirement (including for this purpose,continuous service with an entity prior to the date such entity was acquired by the Corporation or a Subsidiary of the Corporation, but excluding any service prior to January 1, 1975), 

		At least 70 but less than 80 points	          50% of each unvested option shall vest		At least 80 but less than 90 points	           75% of each unvested option shall vest		At least 90 points			                                   100% of eachunvested option shall vest

and all Options held by the Optionee to the extent then exercisable may be exercised at any time prior to the expiration date of the Option or within three years after the date of the Optionee's retirement, whichever period isshorter.

	(e)	Notwithstanding anything in this Plan to the contrary, any ISO which is exercised after the expiration of three months following the cessation of employment for any reason other than Disability or death or  one year afterthe date of termination of employment due to Disability or death, shall be treated as a NQSO.

The Plan shall hereby be amended by adding a new Section 10A to read:

10A.	CHANGE IN CONTROL.

	(a)	Upon the occurrence of a Change in Control, any and all Options granted hereunder shall become immediately exercisable and remain exercisable until such Options expire or terminate under the provisions of this Plan.

	(b)	Upon the occurrence of a Change in Control not approved by the Incumbent Board, any and all Options granted hereunder shall become immediately exercisable, and shall remain exercisable throughout their entire term withoutregard to termination of employment subsequent to Change in Control.  

	**IN WITNESS WHEREOF,** the foregoing amendments to the Coherent Communications Systems Corporation Amended and Restated 1982 Stock Option Plan are hereby adopted as of the 30th day of June, 2000, by the undersigned officer dulyauthorized by resolutions adopted by the written consent of the Board of Directors dated June 30, 2000.

 

							TELLABS OPERATIONS, INC.

 

							By:/s Brian J. Jackman 	
							Name:Brian J. Jackman 	
							Its:	President