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A ppendix B. Connector Pinouts
Table B-8. Adapter Cable D B25 to X.21, D B15 Connector
Protective GND (Shield)
Signal GND
Control A
Control B
Indication A
Indication B
Transmit A
Transmit B
R eceive A
R eceive B
Signal Timing A
Signal Timing B
Base D rop (PBX)
The Drop has a DB-15 female connector as defined in Table B-9.
Table B-9. Pinout Connectors for Terminal Interface
5,6,7,8,10, 12, 13, 14,15
B-8
Name
Pin
1
R x Data (output)
2
Frame Ground
3
Tx data (input)
4
Frame Ground
9
R x data (output)
11
Tx data (input)
Not used
ESU 120e User Manual
DB25Pin
DA15S Pin
1
7
4
19
10
8
10
12
2
14
3
16
11
15/17
9/12
13
Name
1
8
3
5
2
9
4
6
61200420L1-1
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