ADTRAN 25 manual Circuit Pack Type LEDs if Normal LEDs if Failed

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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