Nortel 8600 dslam 用户手册
A-1
8600-A2-GN20-20
October 1997
LEDs
A
Overview
This appendix describes the meaning of the LEDs on the HotWire 8600 DSLAM
chassis and MCC card.
chassis and MCC card.
HotWire 8600 DSLAM Chassis
The 8600 chassis allows addressable diagnostic connectivity between the MCC
and each of the DSL cards. It also converts and distributes – 48V power to the
cards in the chassis. In addition, it provides fans to cool the circuit cards.
and each of the DSL cards. It also converts and distributes – 48V power to the
cards in the chassis. In addition, it provides fans to cool the circuit cards.
The following table describes the meaning and states of the LEDs on the front
panel of the carrier.
panel of the carrier.
LED
LED is . . .
Indicating . . .
DC PWR A
Green
Off
Normal operation for Power Source A.
Low, high, or no voltage for Power Source A.
DC PWR B
Green
Off
Normal operation for Power Source B.
Low, high, or no voltage for Power Source B.
FAN ALM
Yellow *
Off
Fan failure or a single fan in the Fan Module is working at
less than 50% of its normal output.
less than 50% of its normal output.
Normal operation or no power to mounting.
* A built-in feature shuts off power to the circuit cards if a chassis overheats because
of fan failure. If the temperature in the chassis reaches 70
°
C, power to
the cards in the chassis is turned off automatically. Power is turned on when the
temperature drops below 60
temperature drops below 60
°
C.