Table of Contents
Advertisement
Loopbacks Overview
A loopback test is a diagnostic procedure in which a signal is transmitted and returned
to the sending device after passing through all or a portion of a network or circuit. The
returned signal is compared with the transmitted signal in order to evaluate the integrity
of the equipment or transmission path. The following are the Loopbacks available.
T1 Loopbacks
Card
Controller T1
Quad T1
V.35 T1
V.54 T1
OCU-DP Loopbacks
l
Manual OCU Loopback
l
Manual CSU Loopback
l
OCU Latching Loopback
l
CSU Latching Loopback
l
DSU Latching Loopback
l
DSU Non-Latching Loopback
l
CSU Non-Latching Loopback
l
OCU Non-Latching Loopback
l
OCU Manual Loopback
l
CSU Manual Loopback
Compact T1 - Release 6.1
Line
Equipment
Yes
No
Yes
Yes
Yes
Yes
Yes
Yes
Diagnostices & Troubleshooting
Loopbacks Overview
Payload
Yes
Yes
No
No
CSU
Yes
Yes
No
No
B-7
Advertisement
Table of Contents
