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Line Loopback
The local Line Loopback (LLB) loops the information received on the selected
interface back to the source of the loopback. When used with a pattern test at the
remote node, LLB determines whether the problem is with the sending device or
the T1 facility.
An LLB cannot be started when one of the following tests is active:
T
T
7123-A2-GB20-00
Main Menu
Test
Network Physical Tests
Other
All
T1
1s
Interface
Payload Loopback, Send Remote Line Loopback, or an active Monitor Pattern
on this network interface.
Send Pattern test on this network interface.
September 2001
Framer
The T1
LLB
Interface
6. Troubleshooting
97-15336
6-13
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Table of Contents
Troubleshooting
