Troubleshooting guide

MX2820 System Manual
7-100 61186003L1-1D
PROCEDURE
1. Connect to the craft port for the shelf being tested. For details, refer to DLP-715.
2. Logon to the MX2820 system. For details, refer to DLP-716.
3. From the MX2820 system Main Menu, select
SYSTEM CONTROLLER and press ENTER.
4. From the System Controller menu, select
TEST.
5. From the Test menu, select
TEST ALARM RELAYS.
6. Configure the Alarm Relay Concentrator for Out-of-Service or Test.
If the MX2820 shelf connects to an Alarm Relay Concentrator which connects to an
upstream alarm system, configure the Concentrator in Out-of-Service or Test mode for the
MX2820 shelf’s input positions so that no alarms are forwarded. Refer to the appropriate
Alarm Relay Concentrator documentation.
7. Check the Critical relay.
a. From the Alarm Relay Tests Screen menu, select option 1, and press ENTER to toggle the
Critical relay on.
b. Verify that the Alarm Relay Concentrator indicates a critical alarm for the shelf
location.
c. Select menu option 1, and press ENTER to toggle the Critical relay off.
d. Verify that the alarm indication clears on the Concentrator.
8. Check the Major relay.
a. From the Alarm Relay Tests Screen menu, select option 2, and press ENTER to toggle the
Major relay on.
b. Verify that the Alarm Relay Concentrator indicates a major alarm for the shelf location.
c. Select menu option 2, and press ENTER to toggle the Major relay off.
d. Verify that the alarm indication clears on the Concentrator.
9. Check the Minor relay.
a. From the Alarm Relay Tests Screen menu, select option 3, and press ENTER to toggle the
Minor relay on.
b. Verify that the Alarm Relay Concentrator indicates a minor alarm for the shelf location.
c. Select menu option 3, and press ENTER to toggle the Minor relay off.
d. Verify that the alarm indication clears on the Concentrator.
10. Repeat steps 7 - 10 for each MX2820 shelf connected to external alarm equipment.
11. Restore the Alarm Relay Concentrator.
If the Alarm Relay Concentrator was re-provisioned, restore the provisioning. Verify that
the Concentrator does not show any alarm states for the MX2820 shelf.
FOLLOW-UP PROCEDURES
Once this procedure is complete, return to the procedure which called out this DLP and
continue with the tasks indicated.