Local Loopbacks - Paradyne HotWire 7925 User Manual

Testing

Local Loopbacks

When local loopback is enabled the red Loop Bk LED on the front panel of the
initiating unit (CO or CP) lights up and remains lit until the loopback is disabled.
Figure 7-1 illustrates local loopback from a CO unit in a connection between two
units of the same compatibility (either two G.703-compatible units or two
V.35-compatible units).
Figure 7-1. Local Loopback from CO End, Two Like Units
Figure 7-2 illustrates local loopback in the same connection as in Figure 7-1, but
the loopback is initiated from the CP end.
Figure 7-2. Local Loopback from CP End, Two Like Units
7-2
CO
Diagnostic
E1 HDSL
Equipment
7900
7900
Terminal
(both G.703 or both V.35)
CO
Diagnostic
E1 HDSL
Equipment
7900 7900
(both G.703 or both V.35)
June 1997
CP
E1 HDSL
7900
7900
Loop Bk
LED lights
CP
E1 HDSL
7900 7900
Terminal
Diagnostic
Equipment
97-15249-01
Diagnostic
Equipment
Loop Bk
LED lights
97-15518
7925-A2-GB20-30
PRELIMINARY DRAFT