GAI-Tronics XAAB002A Audio Accessory Box - Manual (Page 11)

Model XAAB002A Audio Accessory Box Operation
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J3, Desk Microphone, 8-pin Modular, Motorola Standard
J3 is the connector for the desktop microphone, Model XDM002A. The pin-out matches the Motorola
standard 8-pin modular desk mic.
Table 3. J3 Desk Mic Connector Pin-out
Pin No. Function
1 Not connected
2 Not connected
3 Monitor logic input from desk mic
4 Audio ground
5 TX audio towards radio. Nominal level = 80 mV ac
6 PTT logic low output towards radio
7 Not connected
8 RX audio from radio. Nominal level = 100 mV ac
J4, GAI-Tronics Handset, 4-pin Modular Connector
J4 is the connector for the GAI-Tronics handset.
Table 4. J4 GAI-Tronics Handset Connector Pin-out
Pin No. Function
1 TX audio towards radio. Nominal level = 25 mV ac
2 RX audio from radio. Nominal level = 100 mV ac
3 Handset analog logic functions
4 Audio ground
J5, Boom Microphone Audio, RCA-type, Phono-Jack Connector
J5 is an RCA-type audio jack that is used as the connector for a boom, a Model XGM002A Gooseneck
Microphone, or a Model XDM003A Desktop Mic.
Table 5. J5 Boom Microphone Audio, Phono-Jack Connector Pin Function Descriptions
Pin Description Function
Center pin TX audio input
Outer shield Audio ground