User manual

DTS Broadcast PDH Microwave Digital Radio User Manual
-85-
9 Troubleshooting
9.1 General
This section describes the features available to assist the operator in tracking and correcting
L54 radio problems. These features include a series of discrete alarm functions that will assist in
tracking both configuration errors and radio failure conditions using the front panel controls at one end
of a working radio link. The five multi-function LED alarm indicators on the front panel can be
mapped to five alarm relays for connecting to external alarm reporting systems. The factory default
mapping of the relays is shown in Table 7- 1
9.2 Discrete Alarm Descriptions
Trib fault
Alarm condition indicates LOS (loss-of-signal) condition detected on the tributary input.
If alarm occurs, check continuity of data connections to L54 IDU.
Note. Set tributary configuration to “NO” if data is not applied to a tributary whose tributary is
unused as detailed in Section 6.1.2 & 6.2.2
Service Card Alarms
Alarm condition indicates alarm conditions detected on the service card. There have different
alarm depend on different service card. For 4/8/16E1 service card, alarms list below:
RAD, Frame loss in remote service card
AIS, all one in remote service cards
OOF: Frame loss in local service card
GLOS: All one in local service card.
The action required to resolve the fault will depend upon all the accompanying alarms.
Recommend use of loopback features in LCD panal to locate the problem.
Remote alarm
The remote terminal has detected alarms. To correct them please check remote terminal.
Frame loss:
Alarm condition indicates the remote terminal has detected alarms. To correct them please check
remote terminal.
The action required to resolve the fault will depend upon all the accompanying alarms in remote
terminal. Recommend use of loopback features to locate the problem.