NQW267-26

Lexent Technologies, Inc.07/05/01FCC # NQW267-26 UPDATE ATTACHMENT SECTION 15.231(a)2 TRANSMISSION LENGTH COMPLIANCE & SCHEMATICS Re: FCC ID NQW267-26 Applicant: Lexent Technologies Inc Correspondence Reference Number: 6118 731 Confirmation Number: EA92798 Date of Original E-Mail: 02/16/1999 COMPANY PRODUCT NAME Lexent Technologies, Inc iSpy Detector Unit FCC ID: NQW267-26 FCC Part 15 Subpart 15.231 Periodic Operation in the Band 40.66-40.70 MHz and above 70MHz Compliance Lexent Technologies, Inc.07/05/01FCC # NQW267-26 Compliance with Section 15.231(a) 2 The iSpy Detector Unit transmits for roughly 600mS (600 milliseconds) at a duty cycle of less than 50% following the detection of motion. The ~600mS transmission is made up of a 400mS 50% duty cycle start signal, a registration signal, a control signal and a stop signal. Depending on the Mode of operation, following the first transmission, a second signal identical to the first may be transmitted following a delay of up to 1 second. The two ~600mS long transmissions are in full compliance with Section 15.321(a)2 in that the transmitter sending pure control information must stop transmission within 5 seconds after activation. Lexent Technologies, Inc.07/05/01FCC # NQW267-26 iSpy Detector Unit Circuit Diagram