ADTRAN 1000R Series - Manual (Page 601)

Command Reference Guide E1 Interface Configuration Command Set
61200510L1-35E Copyright © 2005 ADTRAN 601
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 E1 network interface.
payload Initiates a loopback of the E1 framer (CSU) portion of the E1 network interface.
Default Values
No default necessary for this command.
Applicable Platforms
This command applies to the NetVanta 1000R, 3000, 4000, and 5000 Series units.
Command History
Release 5.1 Command was introduced.
Functional Notes
The following diagram depicts a line loopback.
Usage Examples
The following example initiates a line loopback of the E1 interface:
(config)#interface e1 1/1
(config-e1 1/1)#loopback network line
E1 Network Interface
DS1
NI CSU
Line Loopback