clock controller LED is also included in the power on self-test. See Table 48: NTAK09 LED
states during self-test on page
108.
Table 48: NTAK09 LED states during self-test on page 108 provides the state of the NTAK09
LEDs during the self-test procedure.
Table 48: NTAK09 LED states during self-test
Action LED State
Power up system Top five LEDs on for eleven seconds.
Self-test in progress Top five LEDs go off for one second.
If the self-test passes, the top five LEDs flash on and
of
f 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.
NTAK20 power on self-test
The clock controller daughterboard LED is the second LED from the bottom on the faceplate
of the NT
AK09 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 completes, the LED remains Red until the clock controller is enabled. When
enabled, the clock controller LED turns green or flashes green.
NTAK93 self-test
The NT
AK93 DCHI daughterboard LED is the bottom LED on the faceplate of the NTAK09 DTI/
PRI card.
The NTAK93 DCHI daughterboard does not perform a self-test when power is applied to it.
When power is applied, it turns Red and remains steadily lit, indicating the D-channel is
disabled. When the D-channel is enabled, the LED turns green and remains steadily lit.
Self-tests of the NTAK93 daughterboard are invoked manually by commands in LD 96.
DTI/PRI local self-test
The local self-test, also called a local loopback test, checks speech path continuity
, zero code
suppression, remote alarm detection, and A and B bit signalling. This test is performed
manually on a per-loop (or link 24 channels) or per-channel basis. The local loopback test
1.5 Mb DTI/PRI maintenance
108 ISDN Primary Rate Interface Maintenance November 2011
Comments? infodev@avaya.com
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