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Chapter 4. Status Menu
Alarms and Errors
The following are alarms and errors which can be seen.
LOSS OF SIGNAL
No signal detected at NI
LOSS OF FRAME
NI unable to frame align with incoming FAS /NFAS framing
pattern. Remote Alarm (Bit 3 of NFAS word) is transmitted out
the network interface.
LOSS OF TS16 MF
NI unable to sync on TS16 multiframe signal. Valid only when
CAS/TS16 framing enabled. Remote multiframe Alarm is
transmitted out the network interface.
LOSS OF CRC-4
NI unable to sync on CRC-4 multiframe signal. Valid only when
CRC-4 framing is enabled. Remote Alarm is transmitted out the
network interface.
AIS RECEIVED
Unframed ones being received at network interface.
TS16 AIS RCVD
Unframed ones being received in TS16 on network interface.
Remote multiframe alarm transmitted out network interface.
REMOTE ALARM
Remote alarm signal (Bit 3 of NFAS word) being received at
network interface.
REMOTE MF ALARM
Remote multiframe alarm signal (Bit 6 of TS16 for three
consecutive multiframes) being received at network interface.
EXT CLOCK ALARM
No external clock at DTE.
BPV/CV RCVD
Indicates that a Bipolar violation has occurred when set for
AMI line coding. Indicates that a code violation has occurred
when set for HDB3 line coding.
4-4
ESU LT User Manual
61200410L1-1
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