1056 NTRB21 DTI/PRI/DCH TMDI card
Figure 300
NTRB21 TMDI card with clock controller
In general, the first five LEDs operate as follows:
•During system power up, the LEDs are on.
•When the self-test is in progress, the LEDs flashon and off three times,
then go into their appropriate states, as shown in Table 432 "NTRB21
LED states" (page 1056).
Table432
NTRB21 LED states
LED State Definition
DIS On (Red) The NTRB21 circuit card is disabled.
Off The NTRB21 is not in a disabled state.
ACT On (Green) The NTRB21 circuit card is in an active state. No alarm states
exist, the card is not disabled, nor is it in a loopback state.
Off An alarm state or loopback state exists, or the card has been
disabled. See the other faceplate LEDs for more information.
RED On (Red) A red-alarm state has been detected.
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23 May 2008
Copyright© 2003-2008, Nor tel Networks
.