Nortel Circuit Card Installation Manual page 711

Table 229
NTAK09 LED states
LED State
DIS On (Red)
Off
ACT On (Green)
Off
RED On (Red)
Off
YEL On (Yellow)
Off
LBK On (Green)
Off
The first five LEDs operate as follows:
• During system power up, the LEDs are on.
• When the self-test is in progress, the LEDs flash three times and then go
into their appropriate states, as shown in Table 229.
Definition
The NTAK09 circuit card is disabled.
The NTAK09 is not in a disabled state.
The NTAK09 circuit card is in an active state. No alarm states
exist, the card is not disabled, nor is it in a loopback state.
An alarm state or loopback state exists, or the card has been
disabled. See the other faceplate LEDs for more information.
A red-alarm state has been detected.
No red alarm.
A yellow alarm state has been detected.
No yellow alarm.
NTAK09 is in loop-back mode.
NTAK09 is not in loop-back mode.
NTAK09 1.5 Mb DTI/PRI card
Circuit Card
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Description and Installation