Paradyne 7924 manual Remote Loopbacks, Remote Loopback, Initiated at the CO Unit

Testing

Remote Loopbacks

HWhen a remote loopback is enabled, the red Loop Bk LED on the front panel of the 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.

HA message appears on the remote-end unit reporting that it has been put into loopback.

HThe data flow is indicated by the bold thick arrows in Figures 7-3and 7-4.

HWhen 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 CP AIS

Diagnostic

Equipment

Loop Bk

LED lights

Diagnostic Equipment

AIS = Alarm Indication Signal

Terminal 97-15515-01

Figure 7-3. Remote Loopback, Initiated at the CO Unit

CO	CP
Diagnostic	Diagnostic
Equipment	Equipment
	Loop Bk
	LED lights

Terminal97-15517-01

Figure 7-4. Remote Loopback, Initiated at the CP Unit

7924-A2-GB20-30 October 1997 7-3