4 1 frm4spu.txt FORM 4 U. S. SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 4 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(f) of the Investment Company Act of 1940 [ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligatons may continue. See Instruction 1(b). 1. Name and Address of Reporting Person* (Last) Spurlin (First) Preston (Middle) D (Street) 541 Sterling Drive (City) Richardson (State) TX (Zip) 75081 2. Issuer Name and Ticker or Trading Symbol Microwave Transmission Systems, Inc. 3. IRS or Social Security Number of Reporting Person (Voluntary) 4. Statement for Month/Year August 2001 5. If Amendment, Date of Original (Month/Year) 6. Relationship of Reporting Person to Issuer (Check all applicable) (X) Director (X) 10% Owner (X) Officer (give title below) ( ) Other (specify below) Chief Executive Officer

Table I -- Non-Derivative Securities Beneficially Owned 1. Title of Security 2. Trans- 3. Trans- 4. Securities Acquired(A) 5. Amount of 6. Owner- 7. Nature (Instr. 3) action action or Disposed of (D) Securities ship of In- Date Code (Instr. 3, 4 and 5) Beneficially Form: direct (Instr. 8) Owned at Direct Bene- (Month/ End of (D) ficial Day/ Month Indirect Owner- Year) Code V Amount (A) or Price (Instr. 3 and 4) (I) ship (D) (Instr 4.) (Instr. 4) Common Stock 68/130/01 P ~~250~~2,017,932 A $ 21.5046 ~~250~~7,767,932 D

* If the Form is filed by more than one Reporting Person, see Instruction5(b(v) Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. FORM 4 (continued)

Table II -- Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities) 1. Title of 2. Conver- 3. Trans- 4. Transac- 5. Number of 6. Date Exer- 7. Title and Amount of Under- 8. Price of Derivative.) sion or action tion Code Derivative cisable oflying ~~Underlying~~Securities ~~Deriv-~~Securities of Security Exercise Date (Instr. 8) Securities and ~~Securities~~(Instr. ~~ative~~3 and 4) Deriv- (Instr 3.) Price of Acquired (A) or Expiration ~~(Instr.~~ative ~~3 and 4) Secur-~~ Deriv- (Month/ Disposed Of (D) Date ~~ity~~Secur- ative Day/ (Instr. 3, 4, (Month/Day/ ity Year) and 5) Year) (Instr. 5) Date Expira- Amount or Exer- tion Title Number of Code V (A) (D) cisable Date Shares

Explanation of Responses: /s/ P. David Spurlin 10/31/2001 ---------------------------- --------- **Signature of Reporting {Person) Date P. David Spurlin ** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78(ff)(a) Note: File three copies of this Form, one of which must be manually signed. If space provided is insufficient. See Instruction 6 for procedure. Potential persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

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