ADTRAN 25 manual Fail CPU a R C H Angel Insane Check ZTN85 TERMINATOR?

MAINTENANCE

Multiple Troubles or Trouble That Cannot Be Diagnosed

Symptoms:

Red LED is lighted on all port CPs. SAT displays this message:

“FAIL: CPU: A R C H ANGEL INSANE: CHECK ZTN85: TERMINATOR?”.

P r o c e d u r e s :

1.Check that the TDM bus terminator card(s) is installed in the rear pin field(s) .

Note: The CPU/Memory CP provides built-in b u s termination circuitry for one end of the bus, and the TDM bus termination card is used to terminate the other end.

2.Reseat the CPU/Memory and Service CPs (see “Reseating and Replacing Circuit Packs” under “Routine Maintenance” in this section).

3.If troubles persist, replace units in this order: TDM bus terminator card; Service Circuit CP; CPU/Memory CP. Recheck the system after each unit has been replaced to see if the trouble is clear.

4.If troubles still persist, check the intercabinet cabling.

5.If troubles cannot be cleared, escalate to higher level maintenance.

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