ClearOne comm CONVERGE SR 1212 - Manual (Page 291)

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All models: Port B (Female dB-25)
pin # user Definable Control/status Default Description
1 n Control (Input) preset mask Bit 0
2 n status (output) preset Indicator Bit 0
3 n Control (Input) preset mask Bit 1
4 n status (output) preset Indicator Bit 1
5 n Control (Input) preset mask Bit 2
6 n status (output) preset Indicator Bit 2
7 n Control (Input) preset mask Bit 3
8 n status (output) preset Indicator Bit 3
9 n Control (Input) preset mask Bit 4
10 n status (output) preset Indicator Bit 4
11 n Control (Input) preset mask Bit 5
12 n status (output) preset Indicator Bit 5
13 n Control (Input) preset mask Bit 6
14 n status (output) preset Indicator Bit 6
15 n Control (Input) preset mask Bit 7
16 n status (output) preset Indicator Bit 7
17 n Control (Input) preset mask Bit 8
18 n status (output) preset Indicator Bit 8
19 n Control (Input) preset mask Bit 9
20 n status (output) preset Indicator Bit 9
21 y Control (Input)
22 y status (output)
23 na na +3.3v 300 ma
24 na na +3.3v 300 ma
25 na na ground
ALL mOdELS: RS-232 PORT
pin # user Definable Control
1 n DCD
2 n rxD
3 n txD
4 n Dtr
5 n ground
6 n Dsr
7 n Cts
8 n rts
9 n no connection
NOTE: to avoid communication errors, Clearone recommends using all nine pins when
connecting to the rs-232 port.