AT&T Network Adapter 25 Installation And Maintenance Manual page 181

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
The green LED lights when translations have been loaded and
exists.
remains lighted during normal operation.
November 1995
MAINTENANCE
4-5