Remote Loopbacks - Paradyne HOTWIRE 7924 User Manual

Remote Loopbacks

7924-A2-GB20-20
When a remote loopback is enabled the red Loop Bk LED on the front panel
of remote-end unit (CO or CP) lights up and remains lit until the loopback is
disabled. The loopback LED on the initiating unit does not light.
A message appears on the remote end unit reporting that it has been put into
loopback.
The data flow is indicated by the bold thick arrows in
When the CO initiates a remote loopback, an Alarm Indication Signal (AIS) is
received at the CP end (only if the CP end is G.703-compatible). (AIS is not
received at V.35-compatible CP units.)
CO
Diagnostic
E1 HDSL
Equipment
Terminal
Figure 7-3. Remote Loopback, Initiated at the CO Unit
CO
Diagnostic
E1 HDSL
Equipment
Figure 7-4. Remote Loopback, Initiated at the CP Unit
August 1997
E1 HDSL
7900 7900
Loop Bk
LED lights
E1 HDSL
7900
7900
Loop Bk
LED lights
Testing
Figures 7-3 and 7-4.
CP
AIS
Diagnostic
Equipment
7900
7900
AIS = Alarm Indication Signal
97-15515-01
CP
Diagnostic
Equipment
7900
7900
97-15517-01
Terminal
7-3