Installing a Cisco 12012 3-35
Connecting Route Processor Cables
GRP Console Port Signals
Both Data Set ready (DSR) and Data Carrier Detect (DCD) signals are active when the
system is running. The console port does not support modem control or hardware flow
control. The console port requires a straight-through EIA/TIA-232 cable. Table 3-1 lists the
signals used on this port
Table 3-1
GRP Console Port Signals
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 12012. 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 3-14.
Table 3-2 lists the signals used on the auxiliary port.
Table 3-2
Auxiliary Port Signals
Pin
Signal
Direction
Description
1
GND
–
Ground
2
TxD
Output
Transmit Data
3
RxD
Input
Receive Data
6
DSR
Input
Data Set Ready (always on)
7
GND
–
Ground
8
DCD
Input
Data Carrier Detect (always on)
20
DTR
Output
Data Terminal Ready
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)
Summary of Contents for Gigabit Switch Router Cisco 12012
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