Nortel Networks 1000 User Manual
Page 957
Physical description
957
Table 403
NTRB21 LED states (cont’d.)
LED
State
Definition
YEL
On (Yellow)
A yellow alarm state has been detected.
Off
No yellow alarm.
LBK
On (Green)
NTRB21 is in loop-back mode.
Off
NTRB21 is not in loop-back mode.
Figure 277 "NTRB21 TMDI card faceplate" (page 958)
shows the faceplate
of the NTRB21 TMDI card.
The NTRB21 card uses a standard IPE-sized (9.5" by 12.5"), multi-layer
printed circuit board with buried power and ground layers. It is keyed to
prevent insertion in slot 10. The clock controller daughterboard is fastened
by standoffs and connectors.
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311
02.06
Standard
27 August 2008
Copyright © 2003-2008 Nortel Networks
.