8-K

                  SECURITIES AND EXCHANGE COMMISSION

                        WASHINGTON, D.C.  20549



                                FORM 8-K

                             CURRENT REPORT 
 PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934


Date of Report (Date of earliest event reported)  April 13, 1998



                             TELLABS, INC. 
           (Exact name of registrant as specified in charter)


           Delaware              0-9692         36-3831568 
(State or other jurisdiction  (Commission     (IRS employer  
  of incorporation)           file number)    identification no.)


      4951 Indiana Avenue, Lisle, Illinois           60532 
      (Address of principal executive office)      (Zip Code)


Registrant's telephone number, including area code     (630) 378-8800


                                  N/A 
     (Former name or former address, if changed since last report)



























Item 5.   Other Events

On April 13, 1998, Tellabs, Inc., and Coherent Communications Systems
Corporation, ("Coherent"), announced that (1) Coherent has called a
special meeting of its stockholders for May 12, 1998, to approve the
previously announced merger agreement between the two companies, under
which Coherent would become a wholly owned subsidiary of Tellabs and
(2) Tellabs and Coherent have received a request for additional
information about the merger from the Antitrust Division of the U.S.
Department of Justice.  Further details are contained in the copy of
the joint press release issued by Tellabs and Coherent on April 13, 1998
attached hereto as Exhibit 20.5, which is incorporated by reference
herein. 




SIGNATURES


Pursuant to the requirements of the Securities Act of 1934, the
registrant has duly caused this report to be signed on its behalf by
the undersigned hereunto duly authorized.

                                      TELLABS, INC.




Date: April 20, 1998                By:  /s/ J. Peter Johnson 

                                           J. Peter Johnson 
                                           Vice President, Controller 
                                           and Chief Accounting Officer

                                                     



                             
Item 7.  Financial Statements, Pro Forma Financial Information and
Exhibits

(c)  Exhibits 
  
  Exhibit 20.5      Joint press release issued by Tellabs, Inc., and
                    Coherent Communications Systems Corporation dated
                    April 13, 1998.

EX-20.5

                                                       Exhibit 20.5 

                

                              NEWS RELEASE                   



FOR IMMEDIATE RELEASE         TELLABS CONTACT: Thomas P. Scottino
     04/13/98                                  (630) 378-7504 
                                               tom.scottino@tellabs.com 
                                               www.tellabs.com

                              COHERENT CONTACT: Shirley Owens  
                                                (703) 724-7318  



                      MEETING DATE SET FOR COHERENT 
               STOCKHOLDERS TO APPROVE MERGER WITH TELLABS  

Lisle, Ill.  - Tellabs, Inc., and Coherent Communications Systems
Corporation announced today that Coherent has called a special meeting
of its stockholders for May 12, 1998, to approve the previously
announced merger agreement between the two companies.  Following
approval of the merger, Coherent would become a wholly owned subsidiary
of Tellabs.   

A proxy statement relating to the special meeting was mailed to holders
of record of shares of Coherent common stock on April 3, the record date
set by the Coherent Board of Directors.  The Coherent Board has
unanimously recommended that Coherent's stockholders vote for approval
of the merger agreement at the special meeting.   

On April 8, Tellabs and Coherent received a request for additional
information about the merger from the Antitrust Division of the U.S.
Department of Justice related to their filings under the
Hart-Scott-Rodino Antitrust Improvements Act of 1976.  The two companies
are in the process of complying with the request.   

Coherent (NASDAQ: CCSC) designs, manufactures and markets echo
cancellation and conferencing products for major international
telecommunications companies, cellular and PCS providers, network
operators and Fortune 500 companies.   

Tellabs designs, manufactures, markets and services voice and data
transport and network access systems.  The company's products are used
worldwide by the providers of communications services.  Tellabs, Inc.,
stock is listed on the Nasdaq Stock Market (TLAB).