Monitoring the Unit
6-6
7914-A2-GB20-00
February 1998
Front Panel LEDs
TM
TERMINAL
T1 SDSL
Local Remote Loop Bk
PWR
FAIL
Loop
NETWORK
SYSTEM
DSL
TM
7900
7900
97-15716
Front Panel LEDs for DSX-1-Compatible Unit
TERMINAL
T1 SDSL
Loop BkPWR
FAIL
Loop
7900
CTS
RT
S
RXD
TXD
97-15717
Front Panel LEDs for V.35/V.11-Compatible Unit
LED
Meaning
Local
The local T1 interface has a loss of signal.
Remote
The remote T1 interface has a loss of signal.
Loop Bk
The unit is in loopback. Refer to Chapter 7,
Testing,
for more information.
PWR
Power is applied to the unit.
FAIL
The processor has halted and repairs are required.
Loop
A failure in the SDSL loop has been detected.
NOTE:
The Loop LED lights or blinks during power up, then goes
out when the loop has been established.