Configuring Loopback - Cisco T1 Configuration Manual

Configuring Loopback

Loopback
loopback network line
Configuring Loopback
Before You Begin
Before you configure loopback, you must configure the controller and the CEM.
To set a loopback local on the T1 interface, perform the following tasks in global configuration mode:
enable
configure terminal
controller t1 0/0/1
loopback local line
exit
To set a loopback diag on the T1 interface, perform the following tasks in global configuration mode:
enable
configure terminal
controller t1 0/0/1
loopbackdiag
exit
To set a loopback local on the E1 interface, perform the following tasks in global configuration mode:
enable
configure terminal
controller e1 0/0/1
loopback local
exit
To set a loopback network on the E1 interface, perform the following tasks in global configuration mode:
enable
configure terminal
controller e1 0/0/1
loopback network line
exit
Note To remove a loopback, use the no loopback command.
48-Port T1/E1 CEM Interface Module Configuration Guide, Cisco IOS XE Fuji 16.7.x (Cisco NCS 4200 Series)
12
Configuring T1/E1 Interfaces on 48-Port T1/E1 Interface Module
Description
Loops the incoming signal back in the interface
module using the line loopback mode of the framer.
The framer does not reclock or reframe the incoming
data. All incoming data is received by the interface
module driver.
Loopback network line is supported on E1 interface.