Command Reference Guide

SROS Command Line Interface Reference Guide T1 Interface Configuration Command Set
5991-2114 © Copyright 2005 Hewlett-Packard Development Company, L.P. 511
loopback network [line | payload]
Use the loopback network command to initiate a loopback on the interface toward the network. Use the
no form of this command to deactivate the loopback.
Syntax Description
line Initiates a metallic loopback of the physical T1 network interface.
payload Initiates a loopback of the T1 framer (CSU portion) of the T1 network interface.
Default Values
No default necessary for this command.
Command Modes
(config-t1 1/1)# T1 or DSX-1 Interface Configuration Mode required.
(config-t1 1/2)#
Functional Notes
The following diagram depicts the difference between a line and payload loopback.
Usage Examples
The following example initiates a payload loopback of the T1 interface:
(config)#interface t1 1/1
(config-t1 1/1)#loopback network payload
T1 Network Interface
DS1
NI CSU
Payload Loopback
Line Loopback