Cisco Systems ASR 903 manual DB-9 Connector Pinouts, RJ-45 Connector Pinouts

Chapter 5 Troubleshooting

Pinouts

DB-9 Connector Pinouts

Table 5-7summarizes the pinouts for each serial interface type when using a DB-9 connector.

Table 5-7	DB-9 Pin-outs
Pin	Standard DB-9	Direction	Description	RS-485	IRIG-B
1	NC	Output	Unused	NC	NC
2	RxD	Input	Receive	NC	NC
3	TxD	Output	Transmit	IRIG-B (RS232)	IRIG-B (RS232)
4	DTR	Output	DTR	TxD-	IRIG-B- (RS485)
5	GND		GND	GND	GND
6	DSR	Input	DSR	RxD	NC
7	RTS	Output	RTS	TxD+	IRIG-B+
8	CTS	Input	CTS	RxD+ (	NC
9	NC/GND		Unused or Ring	NC	NC

Note Twisted pairs are 2-5, 6-8, 4-7.

Note The X.21, V.35, RS-485, EIA-449, EIA-530, and IRIG-B standards are not currently supported by software.

RJ-45 Connector Pinouts

Table 5-8summarizes the pinouts for each serial interface type when using an RJ-45 connector.

Table 5-8	RJ45 Pinout
Pin	Standard DB-9	Direction	Description	RS-485	IRIG-B
1	RTS	Input	Ready to send	RxD+ (RS485)	NC
2	DTR	Input	DTR	RxD- (RS485)	NC
3	TxD	Input	Transmit	NC	NC
4	GND		Signal ground	Gnd	Gnd
5	GND		Signal ground	Gnd	Gnd
6	RxD	Output	Receive data	IRIG-B (RS232)	IRIG-B (RS232)
7	DST	Output	DSR	TxD-	IRIG-B- (RS485)
8	CTS	Output	CTS	TxD+	IRIG-B+ (RS485)

Note Twisted Pairs are: 1-2, 3-6, 4-5, 7-8.

Cisco ASR 903 Router Hardware Installation Guide

5-6 OL-25178-05