Specifications

159
Connector Details
on the Station Transponder Unit Interface board. See Installing the VoIP Intercom Board
(P/N 011-0741) for more information about the VoIP Intercom Board.
The serial port, audio/control connections, and power to the Transponder board are
handled through the connectors P3, P4, and P5.
Serial Port (P3)
Audio Connections (P4)
Power Connections (P5)
Pin Description
1 No Connection
2TXD
3RXD
4 No Connection
5 Signal Ground
6 No Connection
7CTS
8RTS
9 No Connection
Pin Description
1 PTT OUT (Connects to radio PTT when VoIP option is not
installed)
2 OFF HOOK (connects to J5-pin 7 on Transponder board)
3 PTT IN (connects to J5-pin 8 on Transponder board)
4 LINE IN (connects to J4-pin 11 on Transponder board)
5 LINE OUT (connects to J4-pin 4 on Transponder board)
6 GND (connects to J5-pin 2 on Transponder board)
Pin Description
1 +12 Vdc
2 DC Ground
3—