Power Requirements; Environment - Nortel Enterprise 1000 Reference Manual

Page 158 of 236
Table 36
NTBK50 faceplate LEDs (Part 2 of 2)
LED
CC
DCH

Power requirements

Environment

553-3023-211 Standard 1.00 June 2001
NTBK50 2.0 Mb PRI card
State
On (Red) The clock controller is software disabled.
On (Green) The clock controller is enabled and is either locked to a
reference or is in free run mode
Flashing NTAK20 is equipped and is attempting to lock (tracking
(Green) mode) to a reference. If the LED flashes continuously
over an extended period of time, check the CC STAT in
LD 60. If the CC is tracking this may be an acceptable
state. Check for slips and related clock controller error
conditions. If none exist, then this state is acceptable,
and the flashing is identifying jitter on the reference.
Off The clock controller is not equipped.
On (Red) DCH is disabled.
On (Green) DCH is enabled, but not necessarily established.
Off DCH is not equipped.
The NTBK50 obtains its power from the backplane, drawing up to 2 A on +5
V, 35 mA on +15 V and 20 mA on –15 V.
The NTBK50 meets all applicable Nortel Networks operating specifications.
Definition