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Issue 2.0 April 2000
365-353-255
DACS II Operation and Maintenance Manual
Release 8.2.6 Features
Remote Loopback Feature
Overview
The Remote Loopback feature provides a way to loopback the signals for
individual DS1/E1 tributaries in a hybrid DS3 signal. This functionality can
be used to verify the operation of each section (multiplexers and facility) of
a data path.
The HMXR circuit pack, located in the HDS3 unit, can perform both the local and
remote multiplexer functions regardless of its position in the network. It is capable
of sending a remote Loopback signal to a remote multiplexer, and it can loopback
a specified DS1/E1 signal to a remote loopback request from a remote multiplexer.
Remote Loopback
Operation
The activation of a loopback signal at the local multiplexer (the DACS II KCR8
HMXR circuit pack) will cause a DS1/EI facility to loopback at the remote
multiplexer (far end equipment). A test signal is applied to the local multiplexer.
This test signal is compared to the signal sent to the local multiplexer by the
remote multiplexer. If differences are detected between the two signals, then the
cause of the fault lies with either the remote multiplexer, the local multiplexer, or
the facility between them. If no differences are detected, then both multiplexers
and the facility between them are operating normally.
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