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Testing
7
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 Chapter 6, Monitoring the Unit:
HFront Panel LEDs
HBoard status and performance statistics
HRemote unit board status and performance statistics
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
ªLocalº and ªremoteº 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
Loopback tests are initiated through the terminal interface from either the CO or
CP side of the HDSL connection.
October 1997 |