Testing; Detecting A Problem; Understanding Loopback Tests - Paradyne HOTWIRE 7924 User Manual

Testing

Detecting a Problem

The unit can detect and report problem conditions and perform diagnostic tests.
The unit offers a number of indicators to alert you to possible problems, as
described in

Understanding Loopback Tests

Loopback is a diagnostic function that enables a technician to isolate equipment
on the HDSL circuit to determine where on the circuit trouble may be occurring.
Loopback takes the system off-line. Data received from T1- or V.35-application
equipment is looped back, as depicted in Figures 7-1 through 7-4.
"Local" and "remote" refer to the point at which the data is looped back. In a local
loopback the data is reflected back by the local (CO) unit. In a remote loopback,
the data is passed on to the remote (CP) unit and then reflected back.
Loopback tests may only be initiated from the CO end of the connection and only
through the system terminal.
7924-A2-GB20-10
PRELIMINARY DRAFT
Monitoring the Unit
Front Panel LEDs
Board status and performance statistics
Remote unit board status and performance statistics
June 1997
, Chapter 6:
7
7-1