AT&T System 25 User Manual
Page 64
INSTALLATION
Table 2-D.
Circuit Pack LED Status Indications
Circuit Pack Type
LEDs if Normal
LEDs if Failed
Service Circuit (ZTN85
Steady Green and
Steady Red or
or ZTN131 [R3])
Flashing or
Amber Off
Steady Amber
CPU/Memory (ZTN129
Flashing Green
Steady Green
or ZTN130 [R3])
or Off
All Other
Steady Green
Steady Red
(Amber Also lighted
(see Note below)
when CP in use)
Note:
The red and green LEDs can both be lighted at the same
time. In normal operation, a lighted red LED indicates that
an alarm has been recorded for that CP. If the green LED is
also lighted, the main processor can communicate with the
CP. A lighted amber LED indicates that a resource on the
CP is being used. A lighted red LED and a dark green LED
indicates that the CP diagnosed itself to be so bad that it has
removed itself from the system.
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