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X.21 Cross-Connect Cable Specifications
To retain FCC Class A qualification all cables must be fully shielded and the shielding must be connected to the metal connectors.
SG2P X.21 Cable |
Description |
Pin Number |
Description |
| |
Female DB15 '0' |
Female DB15 '1' |
|
TxData A |
2 |
4 |
RxData A |
RTS A |
3 |
5 |
DCD A |
RxData A |
4 |
2 |
TxData A |
DCD A |
5 |
3 |
RTS A |
Clock A |
6 |
6 |
Clock A |
GND |
8 |
8 |
GND |
TxData B |
9 |
11 |
RxData B |
RTS B |
10 |
12 |
DCD B |
RxData B |
11 |
9 |
TxData B |
DCD B |
12 |
10 |
RTS B |
Clock B |
13 |
13 |
Clock B |
Rx=Receive, Tx=Transmit, CTS=Clear to Send, RTS=Ready to Send,
DTR=Data Terminal Ready, DSR=Data Set Ready, DCD=Data Carrier Detect
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