Cisco Systems RSP8 manual Auxiliary Port Signals, Console and Auxiliary Y-Cable Pinouts

Reference Information

Table 5	Console Port Signals (Continued)
Pin	Signal	Direction	Description
3	RxD	—>	Receive Data
6	DSR	—>	Data Set Ready (always on)
7	GND	–	Ground
8	DCD	—>	Data Carrier Detect (always on)

Auxiliary Port Signals

The auxiliary port on the RSP8 is an EIA/TIA-232, DTE, DB-25 plug to which you can attach a CSU or DSU or other equipment in order to access the router from the network. The asynchronous auxiliary port supports hardware flow control and modem control. Table 6 lists the signals used on this port.

Table 6	Auxiliary Port Signals
Pin	Signal	Direction	Description
2	TxD	—>	Transmit Data
3	RxD	<—	Receive Data
4	RTS	—>	Request To Send (used for hardware flow control)
5	CTS	<—	Clear To Send (used for hardware flow control)
6	DSR	<—	Data Set Ready
7	Signal Ground	–	Signal Ground
8	CD	<—	Carrier Detect (used for modem control)
20	DTR	—>	Data Terminal Ready (used for modem control only)

Console and Auxiliary Y-Cable Pinouts

The console and auxiliary Y-cables allow you to simultaneously connect the console ports or auxiliary ports on two RSPs (configured as system active and slave in RSP slots 2 and 3 in the Cisco 7507 and Cisco 7507-MX, and RSP slots 6 and 7 in the Cisco 7513 and Cisco 7513-MX) to one console terminal or external auxiliary device (such as a modem).

The two Y-cables (Product Number CAB-RSP8CON=, shown in Figure 6, and Product Number CAB-RSP8AUX=, shown in Figure 7) ship with the router and are available as spare parts. The console Y-cable pinout is listed in Table 7, and the auxiliary Y-cable pinout is listed in Table 8.

	Table 7	Console Y-Cable Signals (Product Number CAB-RSP8CON=)
	Female DB-25 Pins		Male DB-25 Pins	Signal Description
	P1-1		J1-1 and J2-1	Ground
	P1-2		J1-2 and J2-2	Receive Data (RxD)
	P1-3		J1-3 and J2-3	Transmit Data (TxD)
	P1-4		J1-4 and J2-4	Clear To Send (CTS); looped to 5
	P1-5		J1-5 and J2-5	Request To Send (RTS); looped to 4
			Route Switch Processor (RSP8) Installation and Configuration Guide
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