Nortel Networks 450 - Manual (Page 275)

Connectors and Pin Assignments
302401-D Rev 00 E-5
DB-9 (RS-232-D) Console/Comm Port Connector
The DB-9 Console/Comm Port connector ( Figure E-4 ) is configured as a data
communications equipment (DCE) connector. The DSR and CTS signal outputs
are always asserted; the CD, DTR, RTS, and RI signal inputs are not used. This
configuration enables a management station (a PC or console terminal) to connect
directly to the switch using a straight-through cable.
Figure E-4. DB-9 Console/Comm Port Connector
Table E-2 lists the DB-9 Console/Comm Port connector pin assignments.
Table E-2. DB-9 Console/Comm Port Connector Pin Assignments
Pin Signal Description
1 CD Carrier detect (not used)
2 TXD Transmit data (output)
3 RXD Receive data (input)
4 DTR Data terminal ready (not used)
5 GND Signal ground
6 DSR Data set ready (output always asserted)
7 RTS Request to send (not used)
8 CTS Clear to send (output always asserted)
9 RI Ring indicator (not used)
Shell Chassis ground
5
6 9
1
619EA
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