Specifications

Monitor and Maintain the CT3IP
Configuring Serial Interfaces IC-89
To enable loopbacks on the T3 (and all T1 channels), use the first command in global configuration
mode followed by any one of the following commands:
Note The port adapter and port numbers for the CT3IP are 0.
Monitor and Maintain the CT3IP
After configuring the new interface, you can monitor the status and maintain the CT3IP in the
Cisco 7000 series routers with an RSP7000 or in the Cisco 7500 series routers by using the show
commands. To display the status of any interface, use one of the following commands in EXEC
mode:
Configure Maintenance Data Link Messages
The CT3IP can be configured to send a Maintenance Data Link (MDL) message as defined in the
ANSI T1.107a-1990 specification. To specify the transmission of the MDL messages, use the
following commands beginning in global configuration mode:
Note Specify one mdl command for each message. For example, use mdl string eic Router A to
transmit “Router A” as the equipment identification code and use mdl string lic Test Network to
transmit “Test Network” as the location identification code.
Command Purpose
controller t3 slot/port-adapter/port Select the CT3IP and enter controller configuration
mode.
loopback local Enable the local loopback.
loopback network Enable the network loopback.
loopback remote Enable the remote loopback.
Command Purpose
show controller cbus Display the internal status of each interface processor
and list each interface.
show controller t3
[slot/port-adapter/port[:t1-channel]] [brief |
tabular]
Display the status of the T3 and T1 channels (values
are 1 to 28) including the T3 alarms and T1 alarms for
all 28 T1 channels or only the T1 channel specified.
show interfaces serial
slot/port-adapter/port:t1-channel [accounting |
crb]
Display statistics about the serial interface for the
specified T1 channel (values are 1 to 28) on the router.
Step Command Purpose
1 controller t3 slot/port-adapter/port Select the CT3IP and enter controller configuration
mode.
2 mdl {transmit {path | idle-signal |
test-signal}|string {eic | lic | fic | unit
| pfi | port | generator} string}
Configure the Maintenance Data Link (MDL)
message.