MX2800 STS-1 User Manual Acceptance Test Procedure, Appendix A
Restore Default Settings
61204659L1-1A A-9
7. Remove the “B” power supply card (the one on the right). This should have no effect on the operation
of the shelf, as the MX2800 is now operating on the “A” power supply.
8. Go to the fuse panel at the top of the bay and remove the fuse corresponding to the “A” power feed.
This should have no effect on the operation of the shelf, as the “A” power supply is now running on the
“B” power feed.
9. Reinsert the fuse for the “A” power feed.
10. Remove the fuse corresponding to the “B” power feed to the shelf. This should have no effect on the
operation of the shelf, as the “A” power supply is now operating on the “A” power feed.
11. Reinsert the fuse for the “B” power feed.
12. Reinsert the “B” power supply into the MX2800 chassis.
13. Reinstall the front panel on the MX2800.
Controller Card Redundancy
The MX2800 can be equipped with either one or two controller cards. The controller card contains all of
the MX2800’s critical circuits (DS1 interfaces, STS-1 interfaces, host controller, etc.). If the MX2800 is
equipped with only one controller card, there is no failure protection. If a failure occurs, an alarm is initi-
ated and the front panel LEDs reflect the condition.
If the MX2800 is equipped with two controller cards, all data traffic is protected, and can be switched over
to the opposite controller card in the event of a card failure. The following procedure will demonstrate the
functionality of a controller switchover:
1. Using the BERT setup that should still be in place after completing the tests in the Verification of Data
Throughput section, insure that the system is still passing data error-free.
2. Log into the Craft Port (if necessary) and access the Main Menu screen. From there, select
Configuration, then Network Interface, then Active Controller. Determine which controller (A or B) is
currently active.
3. Force a switchover to the other Controller Card. If the A controller is active, select controller B as the
active controller. This will force a switchover to the B controller. (If the B controller is the active
controller, force a switchover to the A controller).
4. Check the BERT display for errors. Data traffic will be interrupted momentarily during the switch, but
should become stable and error-free again on the new controller card.
5. The active controller can be left as either A or B. Both cards are identical.
7. RESTORE DEFAULT SETTINGS
The Total Access MX2800 may be restored to the default settings by following the procedure below.
1. Log into the MX2800 Craft Port (if necessary), and access the Main Menu screen. Select
Configura-
tion
, then Utilities, then Load Default Settings.
2. Once the settings have been retrieved, Command Accepted will appear at the bottom of the screen.
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