ADTRAN 1000R Series - Manual (Page 703)

Command Reference Guide T1 Interface Configuration Command Set
61200510L1-35E Copyright © 2005 ADTRAN 703
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.
Applicable Platforms
This command applies to the NetVanta 1000R, 3000, 4000, and 5000 and Total Access 900 Series units.
Command History
Release 1.1 Command was introduced.
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