Nortel Circuit Card Installation Manual page 712

Page 712 of 906
NTAK09 DTI/PRI power on self-test
NTAK20 power on self-test
553-3001-211 Standard 3.00
NTAK09 1.5 Mb DTI/PRI card
When power is applied to the NTAK09 DTI/PRI circuit card, the card
performs a self-test. The LEDs directly associated with the NTAK09 circuit
card are DIS, ACT, RED, YEL, and LBK. The clock controller LED is also
included in the power on self-test. Table 230 provides the state of the
NTAK09 LEDs during the self-test procedure.
Table 230
NTAK09 LED states during self-test
Action
Power up system
Self-test in progress
The clock controller daughterboard LED is the second LED from the bottom
on the faceplate of the NTAK09 DTI/PRI card.
When power is applied to the NTAK20 clock controller, the LED is initially
off for two seconds. If the self-test passes, the LED turns red and flashes on
and off twice.
When the self-test is completed, the LED remains red until the clock
controller is enabled. When enabled, the clock controller LED either turns
green or flashes green.
August 2005
LED State
Top five LEDs light for eleven seconds
Top five LEDs go out for one second
If the self-test passes, the top five LEDs flash
on and off three times.
If the self-test detects a partial failure, the top
five LEDs flash on and off five times
When the self-test is completed, the LEDs are
set to their appropriate states