Acculink DSU/CSU Data Service Unit Models 3160-A4, 3161, 3164-A2, and 3165-A4 Operator's Guide

3. Using the Front Panel
3160-A2-GB24-10 March 2001
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Table 3-2. Network Interface LEDs
Name Color Meaning
SIG
Green Monitors the signal being received from the network.
ON: A recoverable signal is being received from the network.
OFF: The signal cannot be recovered from the network (a Loss of
Signal condition exists).
OOF
Yellow Monitors Out Of Frame (OOF) conditions on the received network
signal.
ON : At least one OOF was detected on the signal during the
sampling period.
OFF: No OOFs were detected on the signal during the sampling
period.
ALRM
Yellow Indicates whether an alarm condition exists on the received
network signal.
ON: An alarm condition (LOS, LOF, EER, Yellow, AIS) exists on
the received network signal. Use the Device Health and Status
command to determine the alarm type.
OFF: No alarm condition exists on the network interface signal.
EER
Yellow Indicates the Excessive Error Rate (EER) has been exceeded on
the network interface.
NOTE:
This LED is only valid when ESF framing is being used.
ON: The EER has been exceeded on the network interface.
OFF: The EER has not been exceeded on the network interface.