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Appendices ~ Appendix C: Connector Pinouts
42
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RS-232 COM DCE port pinout
Pin Number Control Pin Number Control
1 DCD 6 DSR
2 TXD 7 CTS
3 RXD 8 RTS
4 DTR 9 No connection
5 Ground
Control/Status port pinout
Pin # Definable* Status Moment./Latch. Default Description
1 Yes C M Lock front panel toggle
2 Yes S Status of front panel lock
3 Yes C M Mute all mics toggle
4 Yes S Status of mute all mics
5 Yes C M Telephone On/Off toggle
6 Yes S Telephone status
7 Yes C M Auto answer toggle
8 Yes S Status of auto answer
9 Yes C M Mute Output A toggle
10 Yes S Status of Output A mute
11 Yes C M Mute Input A toggle
12 Yes S Status of Input A mute
13 Yes C M Volume Up PA (1dB)
14 Yes S Not Active
15 Yes C M Volume Down PA (1dB)
16 Yes S Not Active
17 No S Mic #1 Gate Status
18 No S Mic #2 Gate Status
19 No S Mic #3 Gate Status
20 No S Mic #4 Gate Status
21 No S Ring indication
22 No connection
23 No * +5VDC
24 No * +5VDC
25 No * Ground
Appendix C: Connector Pinouts
Figure C.1. RS-232 connector
Figure C.2. DB-25 connector