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C
ABLES
Console Port to 9-Pin COM Port on PC
Switch's 9-Pin
Serial Port
1 DCD
2 RXD
3 TXD
4 DTR
5 SGND
6 DSR
7 RTS
8 CTS
9 RI
Console Port to 25-Pin DTE Port on PC
Switch's 9-Pin
Serial Port
1 DCD
2 RXD
3 TXD
4 DTR
5 SGND
6 DSR
7 RTS
8 CTS
9 RI
B-6
CCITT Signal
----------- DCD ------------
<--------- TXD ------------
----------- RXD ---------->
----------- DSR ---------->
----------- SGND ----------
----------- DTR ------------
----------- CTS ----------->
<--------- RTS -------------
----------- RI ---------------
Null Modem
1
2
3
4
5
6
7
9
20
PC's 9-Pin
COM Port
1
3
2
6
5
4
8
7
9
PC's 25-Pin
DTE Port
1
8 DCD
3 TXD
3
2
2 RXD
8
20 DTR
20
7 SGND
7
6 DSR
4
4 RTS
5
5 CTS
6
22 RI
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