3. Using the Front Panel
3160-A2-GB24-10 March 2001 3-7
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 L oss o f
Signal condition exists).
OOF Yellow Monitors Out Of Fr a me (OOF ) cond itions on th e r eceived 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.