1 As filed with the Securities and Exchange Commission on August 26, 1998 Registration No. 33-86612 ================================================================================ SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 -------- POST-EFFECTIVE AMENDMENT NO. 1 TO FORM S-8 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 -------- COHERENT COMMUNICATIONS SYSTEMS CORPORATION (Exact name of registrant as specified in its charter) DELAWARE 11-2162982 (State or other jurisdiction of (I.R.S. Employer Identification No.) incorporation or organization) 45085 UNIVERSITY DRIVE ASHBURN, VIRGINIA 20174 (Address of principal executive offices) COHERENT COMMUNICATIONS SYSTEMS CORPORATION AMENDED AND RESTATED 1982 STOCK OPTION PLAN (Full title of the plan) MARGARET MAXWELL ZAGEL COHERENT COMMUNICATIONS SYSTEMS CORPORATION C/O TELLABS, INC. 4951 INDIANA AVENUE LISLE, ILLINOIS 60532-1698 (Name and address of agent for service) (630) 969-8800 (Telephone number, including area code, of agent for service) Copy to: SIDLEY & AUSTIN ONE FIRST NATIONAL PLAZA CHICAGO, ILLINOIS 60603 (312) 853-7000 ATTENTION: IMAD I. QASIM ================================================================================ 2 This Registration Statement No. 33-86612 (the "Registration Statement") registered an aggregate of 739,893 shares of Common Stock, par value $0.01 per share (the "Securities"), of Coherent Communications Systems Corporation, a Delaware corporation (the "Registrant"). On August 3, 1998, the Registrant became a wholly-owned subsidiary of Tellabs, Inc., a Delaware corporation, following a merger. As a result of the merger, the offering of the Securities has been terminated. The Registrant hereby amends the Registration Statement to remove the Securities from registration under the Registration Statement. -2- 3 SIGNATURES Pursuant to the requirements of the Securities Act of 1933, as amended, the Registrant has duly caused this Post-Effective Amendment No. 1 to the Registration Statement to be signed on its behalf by the undersigned thereunto duly authorized, in the City of Lisle, State of Illinois, on August 26, 1998. COHERENT COMMUNICATIONS SYSTEMS CORPORATION By: /s/ Daniel L. McGinnis ---------------------------------------- Daniel L. McGinnis President Pursuant to the requirements of the Securities Act of 1933, this Post-Effective Amendment No. 1 to the Registration Statement has been signed by the following persons in the capacities indicated on August 26, 1998. Name Title - ---- ----- /s/ Daniel L. McGinnis President - ---------------------- (Principal Executive, Financial and Daniel L. McGinnis Accounting Officer) /s/ Lawrence J. Gallick Director - ------------------------ Lawrence J. Gallick /s/ Charles A. Root Director - ------------------------ Charles A. Root /s/ Charles M. Skibo Director - ------------------------ Charles M. Skibo /s/ Ernst Volgenau Director - ------------------------ Ernst Volgenau /s/ Michael J. Birck Director - ------------------------ Michael J. Birck /s/ John E. Vaughan Director - ------------------------ John E. Vaughan Director - ------------------------ Peter A. Guglielmi /s/ Brian J. Jackman Director - ------------------------ Brian J. Jackman /s/ Harvey R. Scull Director - ------------------------ Harvey R. Scull -3-