GE LBI-38378C - Manual (Page 10)

TABLE 2 - UDC PIN FUNCTIONS
PIN NAME INPUT OR
OUTPUT
USE
1 GROUND ------- Case Ground
3 UDC RX AUDIO Output Test Point For Speaker Audio
4 SWBATT Output Switched Accessory Power
5 EXT PTT Input External Microphone PTT Input
6 TX DATA Input For Programming
7 RX DATA Output For Programming
8 SPARE
9 UDC VOLT ------- Option/Accessory Sense Pin
10 T/R Output Low = Transmit, High = Receive
11 UDC MUTE Output Low = Audio Muted
12 EXT MIC HI Input External Microphone Audio Input
13 EXT EMER Input Lanyard Connection
34 UDC DISCR Output Test Point For RX Audio
Figure 5 - UDC Pin-Out
LBI-38378
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