Bay Networks CM 100 Manuel d'instructions télécharger pdf (Page 129)

Connectors and Pin Assignments

893-00992-A B-5

DB-9 (RS-232-D) Service Port Connector

The DB-9 service port connector (see Figure B-4) is conﬁgured as a data

communications equipment (DCE) device connector. The DSR and CTS signal

outputs are always asserted. The CD, DTR, RTS, and RI signal inputs are not

used. This arrangement allows a management station (a PC or terminal) to directly

connect to the switch using a straight-through cable.

Figure B-4. DB-9 service port connector

Table B-2 shows the service port connector pin assignments.

Table B-2. Service 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

619EA

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Bay Networks CM 100 Manuel d'instructions Page 129