RAD Data comm HCD-E1 ユーザーズマニュアル
Chapter 5 - Troubleshooting and Diagnostics
HCD-E1
Installation & Operation Manual
5-2
Status Indications and Alarms
01/01/01 08:15
When an ON/OFF-type alarm changes its state from ON to OFF, it is not
removed from the alarm buffer. Moreover, a new entry of this alarm is
added to the alarm buffer. This feature enables you to see the alarm history
on the terminal using the DSP ALM command. A typical display looks like
this:
removed from the alarm buffer. Moreover, a new entry of this alarm is
added to the alarm buffer. This feature enables you to see the alarm history
on the terminal using the DSP ALM command. A typical display looks like
this:
ALARM 01
SIGNAL LOSS: SL
OFF
1998-01-01
00:04.46
ALARM 01
SIGNAL LOSS: SL
ON
1998-01-01
00:00.01
Messages displayed on the LCD and on the control terminal have a similar
syntax. Table 5-1 presents in alphabetical order the alarm messages
displayed on the HCD-E1 LCD and control terminal, and lists the actions
required to correct the alarm condition.
syntax. Table 5-1 presents in alphabetical order the alarm messages
displayed on the HCD-E1 LCD and control terminal, and lists the actions
required to correct the alarm condition.
H-RPT Alarms
If you have an H-RPT repeater on the HDSL link, HCD-E1 allows you to
monitor and work with the H-RPT alarms via its supervision terminal. The
H-PRT buffer stores a maximum of 100 alarms. The types and states of the
H-RPT alarms and the rules of working with the H-RPT alarm buffer are
exactly the same as for the HCD-E1 alarm buffer. Table 5-2 presents the
H-RPT alarm messages displayed on the HCD-E1 control terminal in order of
their numbers, and lists the actions required to correct the alarm condition.
The H-RPT alarms are not available from the LCD.
monitor and work with the H-RPT alarms via its supervision terminal. The
H-PRT buffer stores a maximum of 100 alarms. The types and states of the
H-RPT alarms and the rules of working with the H-RPT alarm buffer are
exactly the same as for the HCD-E1 alarm buffer. Table 5-2 presents the
H-RPT alarm messages displayed on the HCD-E1 control terminal in order of
their numbers, and lists the actions required to correct the alarm condition.
The H-RPT alarms are not available from the LCD.
Alarm Relay
HCD-E1 has an alarm relay, which enables you to automatically turn on
alarm indication by properly connecting the relay alarm contacts to your
alarm equipment (see “Connecting the HCD-E1 Alarm Relay Port” in
Chapter 2).
alarm indication by properly connecting the relay alarm contacts to your
alarm equipment (see “Connecting the HCD-E1 Alarm Relay Port” in
Chapter 2).
The Alarm Relay has a pair of change-over dry contacts: the Normally-Open
(NO) contacts close in case of an alarm, and the Normally-Close ( NC)
contacts open in case of an alarm. The alarm contacts are floating with
respect to the signal and chassis grounds of HCD-E1.
The following events will activate the alarm relay:
(NO) contacts close in case of an alarm, and the Normally-Close ( NC)
contacts open in case of an alarm. The alarm contacts are floating with
respect to the signal and chassis grounds of HCD-E1.
The following events will activate the alarm relay:
•
Loss of power (indicated by the NO contacts)
•
Detection of a hardware failure, or any other failure, during the power-
up self-test
up self-test
•
Detection of real-time clock battery failure during the power-up self-test
•
Detection of a disruption in the database during the power-up self-test
•
Loss of HDSL lines (1 or 2) synchronization
•
Signal loss, excessive bit error rate, excessive rate of bipolar violations,
loss of local or remote frame synchronization or reception of AIS on the
E1 sublink.
loss of local or remote frame synchronization or reception of AIS on the
E1 sublink.
The corresponding alarms in Table 5-1 are marked with an asterisk (*). The
relay returns automatically to the no-alarm state when none of the alarm
conditions listed above is present.
relay returns automatically to the no-alarm state when none of the alarm
conditions listed above is present.