Connectors and Pin Assignments

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.

1 5

69

619EA

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

 

 

 

302401-D Rev 00

E-5

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Nortel Networks 450 DB-9 RS-232-D Console/Comm Port Connector, Table E-2 DB-9 Console/Comm Port Connector Pin Assignments