ADTRAN 25 manual November

MAINTENANCE

Memory (ZTN81 [RIV7] or ZTN127 [RI V2]J: The red LED on this CP lights when power is applied and goes dark upon successful completion of the ROM checksum test initiated by the Call Processor CP. Failure is indicated by a steadily lighted red LED.

Call Processor [ZTN82 (R1V1) or ZTN128 (R1V2)]: The green LED on this CP lights when power is applied and flashes during normal operation. When the system resets itself, the green LED lights and then goes dark for a few seconds while the Call Processor performs its self-tests. Once testing is complete, the green LED flashes and the Call Processor resets all port CPs. Failure is indicated when the green LED remains steadily lighted or dark.

CPU/Memory [ZTN129 (R2V1) or ZTN130 [R3]; The green LED on this CP lights when power is applied and flashes during normal operation. When the system resets itself, the green LED lights and then goes dark for a few seconds while the CP’s call processor performs its self-tests. Once testing is complete, the green LED flashes and the call processor resets all port CPs. Failure is indicated when the green LED remains steadily lighted or dark.

Port Circuit Packs; The red LED on port CP lights during power-up testing and goes dark upon successful test completion. The green LED lights when translations have been loaded and remains lighted during normal operation. The red LED remains lighted for any port CP that fails the start-up test or fails while in use. The amber LED lights when any port on the CP is in use.

N o t e : A red LED indicator immediately lights an alarm at the console for all port CPs except the TN767. Because of the sensitivity of this CP to noise and transients, a 15 minute delay exists in lighting the console LED to allow the problem to correct itself. This will help eliminate service calls for transient problems caused by weather or noise.

Clock/Service Circuit (ZTN85 or ZTN131 [R3]): The red LED on this CP lights during self-testing and goes dark upon successful test completion. The amber LED flashes during normal operation (indicating that the clock generator is active) and remains lighted when any tone receiver on the CP is in use. When the amber LED is dark, the CP is not translated or a problem exists. The green LED lights when translations have been loaded and remains lighted during normal operation.

November 1995 4-5