Bay Technical Associates 350 manual DB-9 RS-232-D Service Port Connector

Connectors and Pin Assignments

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

The DB-9 service port connector (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 configuration enables a management station (a PC or terminal) to connect directly to the switch using a straight-through cable.

15

69

619EA

Figure B-4. DB-9 service port connector

Table B-2 lists the DB-9 service port connector pin assignments.

Table B-2. DB-9 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

893-00992-B B-5