Verilink Access Manager 2000 (896-502037-001) Product Manual - Manual (Page 290)

Monitoring and Troubleshooting Access Manager
8-20 Access Manager 2000 User Manual
6. After viewing the current status, press to return to the On-line
Access Menu.
Reviewing CSU status
Except for Low Densit , the CSU monitors the status conditions for both
the NET and EQPT (i.e, data equipment) sides. Loopbacks apply to one
side only. The status items are as follows:
Field Value Meaning
Loss of Signal See AT&T Reference 62411.
Loss of Frame See AT&T Reference 54016.
Out of Frame Although this condition, as defined in AT&T
Reference 54016, might not last long enough
to be visible to the operator, the CSU keeps
the
YES indication alive for up to 1 second
after the condition clears, to make it visible.
AIS (Alarm
Indication
Signal) See ANSI T1.403.
CRC Error See Out of Frame above. The CRC-6 error
indication is also kept alive for 1 second.
Low Density The circuit element is stuffing ONEs into the
signal it has been configured to do when
receiving a low density signal. This only
applies to the EQPT side.
Active ELB, LLB,
RLB, PLB No None of these loopbacks are in progress.
These loopbacks are activated and
deactivated by commands sent over the ESF
Data Link.
BPV Error See Out of Frame above. The BPV error
indication is also kept alive for 1 second.
F2