ADC Campus-REX2 RS - Manual (Page 125)

Chapter 7 - Using the LCD for Configuration and Management
Campus-REX2 RS Interface Card User Manual 113
4 Press Enter.
5 Press Next to scroll through the settings for the alarm.
6 Press Enter to select the preferred setting. RMT LOSS OF SIG ALM
is displayed.
C ONFIGURING L OOPBACKS
Loopbacks provide a way to test the data communication path between the
Campus unit, the remote unit, and the remote host equipment. The
Campus-REX2 supports two types of loopbacks:
• Local to Remote loopbacks test the remote data port, the data path inside
the remote Campus unit, the HDSL line, the HDSL transceivers of both
units, and most of the internal data path inside the local unit. This
loopback does not test the local data port drivers and receivers.
• Remote to Remote loopbacks test the remote data port and a small
portion of the remote interface card.
Once a loopback condition has been initiated, it remains in effect until
cleared. You may also set a loopback timeout to clear the loopback
automatically after a set period of time has elapsed.
You manage loopbacks through the DIAGNOSTICS menu:
1 Press Escape until CAMPUS RS I/F: REX2 is displayed.
2 Press Next four times. DIAGNOSTICS is displayed.
3 Press Enter. LOOPBACK MODE is displayed.
The following sections describe how to initiate and clear loopbacks, and to
set a loopback timeout.
If both the local and remote units have a Campus-REX2 or
Campus-REX interface card, no loopbacks are supported.