GE D20 Installation And Operation Manual page 100

D20/D200
Installation and Operations Guide
Power-up and Test
Procedure Follow these steps to verify either hardware or software switch-over.
Step
1
2
3
4
Note: If you cannot login to WESMAINT on a CCU, then the unit is powered down. A
D20MEA> or D20MEB> prompt is seen on your emulator screen.
98
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Connect a WESMAINT cable to the female DB-9 WESMAINT II+ port
on the front panel of the CCU B D20ME/ME II board, which was
originally the Standby unit.
Attach the other end of the WESMAINT II+ cable to the serial
communications port of the PC or terminal.
Login to WESMAINT through the emulator you are using.
Result: The WESMAINT Main Menu is displayed.
If you can login to WESMAINT, this indicates that CCU B is the Active
CCU.
Results: Fail over has occurred.
Note: If the previously Active A CCU powers-up after a fail over
from CCU A to CCU B, then you will see STNBY at top left
when you login to WESMAINT on CCU B. This can take up
to a minute to occur.
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