Nortel Networks Passport ARN Routers - Manual (Page 142)

Installing and Operating Passport ARN Routers
C-18 114200-E Rev 00
The connector pin assignment described in Table C-15 shows signal and pin
assignments for the modem port.
Table C-15. Service Modem Port DB-9 Pin Assignments
Pin Assignment Pin No. Signal Name Direction
1 DCD (Data carrier detect) From modem
2 TXD (Transmit data) To modem
3 RXD (Receive data) From modem
4 DSR (Data set ready) From modem
5 GND N/A
6 DTR (Data terminal ready) To modem
7 CTS (Clear to send) From modem
8 RTS (Request to send) To modem
9 Not used N/A
Pin 1
Pin 9