3Com RMON-EMP-3 installation and operation guide RS-232 25-Pin Port Connector Pinouts

RS-232 25-Pin Port Connector Pinouts

This section describes the serial port pinouts for the RS-232 25-pin connector on the RMON MultiProbe Module faceplate. Table A-1 lists the pinouts for the RS-232 25-pin connector.

Table A-1. RMON MultiProbe Module RS-232 25-Pin Port

Connector Pinouts

Pin	US	CCITT	DIN
1	CHS GND	101
2	Tx	103	D1
3	Rx	104	D2
4	RTS	105	S2
5	CTS	106	M2
6	DSR	107	M1
7	GND	102
8	DCD	109	M5
20	DTR	108	S1
22	RI	125	M3
23	SR	111

Note: The RMON MultiProbe Module asserts pins 20 and 4 continuously. Pins 20 and 4 are de-asserted only when the serial line is hung up in a modem connection.

Specifications A - 5