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

Testing

Detecting a Problem

Understanding Loopback Tests

7924-A2-GB20-30
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 Chapter 6, Monitoring the Unit
Front Panel LEDs
Board status and performance statistics
Remote unit board status and performance statistics
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 the DTE (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 unit (the unit that initiated the
loopback). In a remote loopback, the data is passed on to the remote (far-end)
unit and then reflected back.
Loopback tests are initiated through the terminal interface from either the CO or
CP side of the HDSL connection.
October 1997
:
7
7-1