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6-9
ROUTING SWITCHER SYSTEM (E)
DIFFERENT CHECK SUM= ???? IN STATION * * *
Check sun value
S-BUS LINK DISCONNECTED
CHANGED OVER TO BACKUP CPU IN STATION * * *
STARTED BY * * * _ * * * * * Ver * .* * IN STATION * * *
6-6. Function Check with Control Terminal
Content : This message is displayed when an error has been detected as the result of ROM
checksum and RAM writing tests performed after resetting the unit.
Countermeasure : Replace the corresponding ROM.
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This error message will be displayed even after the ROM has been replaced. This is normal. Execute the
menu item [J: RECALL MAIN TABLE] from the control terminal, and reset the corresponding unit once
again for the unit to begin operating normally.
Content : This message is displayed when the S-BUS data link has been disconnected some-
where.
Countermeasure : Check the connections between the S-BUS line and each station, and check that unused
S-BUS ports or the ends of S-BUS lines have been terminated with 75 Z. One method
to search for the disconnected sections is using the menu item [R: CALL SECOND-
ARY STATION] and checking for responses.
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Be sure to terminate unused S-BUS ports with 75 Z. When a disconnection has been detected, the
primary station automatically performs 75 Z termination and restarts communication with the stations
just before the disconnection. In this case, some stations may not be able to communicate even though
they are connected.
Content : This message is displayed when an error has occurred in the CPU board during opera-
tions, and it is changed over to the backup CPU board.
Countermeasure : Remove the main CPU board, and repair or replace it with a new one.
Content : This message is displayed when the switcher is restarted due to instantaneous power
failure, etc., or when the power supply is turned ON.