3Com HiPer DSP Руководство по началу работы - Страница 14
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A-2
A
A: T
PPENDIX
ROUBLE
NAC LED indicators
Correcting NAC
alarms and/or error
conditions
C
T
S
LEARING AND
ECHNICAL
Carrier
LED
Physical State
State
F1
Green
F2
Red
F3
Off
F4
Off
F5
Green
F6
Red
Green
Alarm/Error
Level
Remote Frame
Yellow
Alarm
Loss of Signal
Red
Out of Frame
Red
Unframed all
Blue
ones
RFA and
N/A
Continuous
CRC errors
Refer to the NAC's Product Reference for additional hardware trouble
clearing information. The NAC's user interface (UI) console has status
screens that supply information on power-up self tests and card status.
PECIFICATIONS
Loop back/
Alarm
D-channel
LED State
LED State
Off
Off
Off
Off
Red
Off
Red
Off
Red
Off
Red
Off
Amber
Off
Green
Diagnosis/Trouble Clearing
The remote end has lost the HiPer DSP's framing or
signal and sends this alarm to the HiPer DSP.
The received T1 or E1 signal has been lost. The HiPer
DSP declares a red alarm and sends a yellow alarm to
the remote end.
The received T1 or E1 framing has been lost and the
framed payload can no longer be received. The HiPer
DSP declares a red alarm and sends a yellow alarm to
the remote end.
The remote end is sending out an all ones signal. This is
usually done when the remote end can not send out a
framed signal.
The HiPer DSP has received excessive CRC errors in a
one second period and declares state F5. For E1-PRI
certification this is less than 931 errors in one second.
Condition/Physical State
No Alarm
Yellow Alarm
Remote Frame Alarm
Red Alarm
Loss of Signal
Red Alarm
Out of Frame
Blue Alarm
Unframed all ones
CRC & RAI
D-Channel down
Loop Back in Progress