Testing
9-4
7900-A2-GB20-00
March 1998
HDSL T1 Loopback Tests
Local Loopback Test
When a 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.
VT100 Terminal
or Emulator
97-15630
CO
CP
E1 HDSL
7900
7900
Diagnostic
Equipment
Diagnostic
Equipment
Loop Bk
LED Lights
Nest
Figure 9-1.
Local Loopback, Initiated at the CO Unit
VT100 Terminal
or Emulator
97-15631
CO
CP
E1 HDSL
7900
7900
Diagnostic
Equipment
Diagnostic
Equipment
Loop Bk
LED Lights
Nest
Figure 9-2.
Local Loopback, Initiated at the CP Unit
Summary of Contents for HOTWIRE 7900
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