Specifications

System Software Diagnostics Guide — September 2006 33
Diagnosing First Call Issues
5.3 Monitoring the Status of Alarms
After determining that the Signal indicator for all boards in your system is green as described in
Section 5.2, “Monitoring the Signal”, on page 31, check the status of alarms on each trunk.
On the pstndiag tool’s main window, double-click on a specific board to display the board level
view and check the status of the following alarms on each trunk (see Figure 1, “PSTN Diagnostics
Tool - Board Level View”, on page 32 for an illustration):
Red
Red alarm. A red alarm is generated by the line (trunk) of the board being monitored to
report a loss of synchronization (RLOS) in the signal being received. This alarm is
declared after the condition has existed for a specific time period, typically defined as 2.5
seconds (default). The red alarm condition will exist until the synchronization has been
recovered and remains recovered for 12 seconds (default).
Yellow
Yellow alarm. A yellow alarm is generated by the line (trunk) of the board being
monitored to signify that a red alarm condition exists at the receiving (local) end. The
yellow alarm is sent as long as the red alarm condition exists at the receiver device.
Note: It’s possible for the Signal indicator to be green and a yellow or red alarm to be on at
the same time. This situation indicates a possible configuration problem (such as
trunk configuration mismatch) or hardware problem.
RAI
Remote Alarm Indication. If on, this box is yellow. This alarm is turned on by the
firmware indicating a problem on the remote end. In this situation, the Signal indicator for
the trunk will also be red.
AIS
Alarm Indication Service. This alarm can be turned on by you as a test on a specific trunk.
This alarm is not typically used.
TS16RAI
TS16 Remote Alarm Indication. This alarm only applies to E1 lines with Channel
Associated Signaling (CAS).
TS16AIS
TS16 Alarm Indication Service. This alarm only applies to E1 lines with Channel
Associated Signaling (CAS).
D Channel
D channel state. This alarm only applies to ISDN with Common Channel Signaling
(CCS). If the indicator is green, this means that the D channel is available. If the indicator
is grey, this means that the channel is not available.