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Table 153
NTBK50 faceplate LEDs (Part 2 of 2)
LED
DCH
Power requirements
Environment
Architecture
553-3011-100
Standard 14.00
NTBK50 2.0 Mb PRI card
State
Flashing (Green)
Off
On (Red)
On (Green)
Off
The NTBK50 obtains its power from the backplane, drawing maximums of
2 amps on +5 V, 35 mA on +15 V and 20 mA on -15 V.
The NTBK50 meets all applicable Nortel Networks operating specifications.
The main functional blocks of the NTBK50 architecture include:
•
DS-30X interface
•
A07 signaling interface
•
digital pad
•
carrier interface
•
CEPT transceiver
•
SLIP control
•
D-channel support interface
January 2002
NTAK20 is equipped and is attempting to lock
(tracking mode) to a reference. If the LED flashes
continuously over an extended period of time, check
the CC STAT in LD60. 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.
The clock controller is not equipped.
DCH is disabled.
DCH is enabled, but not necessarily established.
DCH is not equipped.
Definition
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