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Monitoring and Testing
4-11
3166-A2-GB20-10
November 1998
Alarms
The DSU/CSU can be attached, either locally or remotely, to an ASCII terminal or
printer to display or print alarm messages. Alarms can also be displayed on a PC
that is using a terminal emulation package.
You can route these alarms to the COM port or dial them out using an external
device.
Each alarm message contains a customer identification to indicate which remote
DSU/CSU is reporting an alarm. For information about customer identification,
refer to
Displaying Unit Identity
in Chapter 3,
SDCP Operation
.
Possible alarm messages are as follows:
H Continuous Loss Of Signal detected at the
Network Interface.
H Alarm Cleared. Loss Of Signal condition at the
Network Interface.
H Continuous Out Of Frame condition detected at the Network Interface.
H Alarm Cleared. Out Of Frame condition at the
Network Interface.
H Alarm Indication Signal received at the Network Interface.
H Alarm Cleared. Alarm Indication Signal at the Network Interface.
H An Excessive Error Rate has been detected at the Network Interface.
H Alarm Cleared. An Excessive Error Rate at the Network Interface.
H Yellow Alarm signal received at the Network Interface
.
H Alarm Cleared. Yellow Alarm signal at the
Network Interface
.
H Continuous Out Of Frame condition detected at synchronous data
port 1.
H Alarm Cleared. Out Of Frame condition at synchronous data port 1.
H An Excessive Error Rate has been detected at synchronous data port 1.
H Alarm Cleared. An Excessive Error Rate at synchronous data port 1.
If two alarm conditions are detected at once, the higher priority alarm is reported.
However, if an even higher priority alarm is detected before the first alarm is
cleared, the later alarm is not reported. (The alarms listed above are in priority
order with the highest priority listed first.)
Alarms remain active until the alarm condition is cleared. Also, an alarm clear
message is only sent when there are no other alarms active.
For information about alarm configuration options, refer to
Alarm Configuration
Options
in Appendix C,
Configuration Options
.
For troubleshooting information, refer to
Troubleshooting
on page 4-14.