OK
SIG
OOF
ALM
SIG
OOF
ALM
9109 DSX
IN
OUT
IN
OUT
IN
OUT
IN
OUT
DSX 2 DSX 1 DSX 2 MON DSX 1 MON DSX1 DSX2
97-15642-01
Test
Jacks
LEDs
Troubleshooting
9-6 9161-A2-GH30-30
April 1998
Dual DSX APM LEDs

DSX 1 and DSX 2 Interface LEDs

Label Indication Color What It Means
SIG Signal Green ON – A recoverable signal is present on the
DSX1/DSX2 interface.
OFF – The signal cannot be recovered from
the DSX1/DSX2 interface. An LOS
condition exists.
OOF Out of Frame Yellow ON – At least one OOF was detected during
the sampling period.
OFF – No OOFs were detected during the
sampling period.
ALM Alarm Yellow ON – An alarm condition is present on the
DSX1/DSX2 interface.
Current alarm conditions:
Loss of Signal (LOS)
Loss of Frame (LOF)
Excessive Error Rate (EER)
Yellow
Alarm Indication Signal (AIS)
OFF – No alarm condition is present on the
DSX1/DSX2 interface.

General Status LED

Label Indication Color What It Means
OK Power and
Operational
Status
Green ON – The APM has power and is
operational.
OFF – The APM is in a local self-test, or there
is a failure.