Cisco Systems Cisco 12008 manual GRP Ethernet Connection Equipment, GRP Auxiliary Port Signals

Connecting Route Processor Cables

GRP Auxiliary Port Signals

The auxiliary port on the GRP is a DB-25 plug DTE port for connecting a modem or other DCE device (such as a CSU/DSU or other router) to the Cisco 12008. The port is located above the console port on the GRP faceplate. The auxiliary port supports hardware flow control and modem control. An example of a modem connection is shown in Figure 3-7. Table 3-2 lists the signals used on the auxiliary port.

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

GRP Ethernet Connection Equipment

The Ethernet port on the GRP has both a media independent interface (MII), 40-pin, D-shell type receptacle and a media dependent interface (MDI) RJ-45 receptacle that are capable of data transmission rates from 10 and 100 megabits per second (Mbps). (See Figure 3-8.)

Installing a Cisco 12008 3-23