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Console Port to 9-Pin COM Port on PC
Console Port to 25-Pin DCE Port on Modem
B-5
PIN ASSIGNMENTS
Switch Port PC Port
DB-9 Pin No. Signal DB-9 Pin No.
1 (DCD) DCD 1
2 (RXD) TXD 3
3 (TXD) RXD 2
4 (DTR) DSR 6
5 (SGND) SGND 5
6 (DSR) DTR 4
7 (RTS) CTS 8
8 (CTS) RTS 7
9 (RI) RI 9
Switch Port 25-Pin Modem Port
DB-9 Pin No. Signal DCE Pin No.
1 DCD 8
2 RXD 3
3 TXD 2
4 DTR 20
5 SGND 7
6 DSR 6
7 RTS 4
8 CTS 5
9RI22