Grp Auxiliary Port Signals; Grp Ethernet Connection Equipment - Cisco Gigabit Switch Router 12008 Installation And Configuration Manual

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
Pin
1
2
3
4
5
6
7
8
20
22

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.)
Auxiliary Port Signals
Signal Direction
Signal Ground –
TxD Output
RxD Input
RTS Output
CTS Input
DSR Input
Signal Ground –
CD Input
DTR Output
RING Input
Connecting Route Processor Cables
Description
Signal Ground
Transmit Data
Receive Data
Request To Send (used for hardware flow control)
Clear To Send (used for hardware flow control)
Data Set Ready
Signal Ground
Carrier Detect (used for modem control)
Data Terminal Ready (used for modem control
only)
Ring
Installing a Cisco 12008 3-23