ADC H2TU-C-388 Manual Do Utilizador

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Testing
 
 152-388-100-02, Issue 2
36
June 6, 2000
 H2TU-C-388 List 1
T
ESTING
This section provides information about front-panel system alarms, LOS and AIS response, OCT55 test 
procedure, and loopback testing.
F
RONT
-P
ANEL
 S
YSTEM
 A
LARMS
 summarizes all possible HiGain system alarms in order of priority as they appear on the front panel. 
When multiple alarms occur, the front-panel display only reports the highest priority alarm. The alarm history 
screens display alarms also, but provide greater detail. See 
. All alarms that are not inhibited will drive the front-panel Status LED to a flashing red alarm state.
Table 14.
 Front-Panel System Alarms Summary
Front-Panel 
Message
 (a)
Alarm
Description
To Inhibit
PWR FEED 
SHRT
 (b)
Power Feed Short
A short exists between the Tip and Ring of 
the HDSL2 pair.
Cannot be inhibited.
PWR FEED 
GND
Power Feed Ground
The HDSL2 loop is grounded.
Cannot be inhibited.
PWR FEED 
OPEN
Power Feed Open
A line power open condition exists.
Cannot be inhibited.
LOSW
 (c)
Loss of Sync Word
 (d)
The HDSL2 loop has lost synchronization.
Cannot be inhibited.
LLOS
Local Loss of Signal
Loss of the DSX-1 input signal.
Cannot be inhibited.
RLOS
Remote Loss of Signal
Loss of the H2TU-R DS1 input signal.
Disable the RDA (Remote Disconnect 
Alarm) option. The front-panel Status LED 
still flashes red and the ALRM RLOS 
message displays to alert you of the LOS 
state. LOS is sent towards the network 
from the H2TU-C. This option prevents the 
common occurrences of a CPE LOS 
condition from generating recurring 
alarms and AIS payloads.
LAIS
Local Alarm Indication 
Signal
Indicates an AIS (all ones) pattern is being 
transmitted from the local DS1 output 
port.
Cannot be inhibited.
RAIS
Remote Alarm 
Indication Signal
Indicates an AIS (all ones) pattern is being 
received at the H2TU-R DS1 input port.
Cannot be inhibited.
LRAI
Line RAI—Remote 
Alarm Indication at the 
H2TU-R (Net signal 
does not have errors.)
Indicates an RAI alarm (yellow) from the 
CPE with an error-free signal from the line 
unit or network.
Cannot be inhibited.
RRAI
Remote RAI—Remote 
Alarm Indication at the 
H2TU-R. (Net signal 
has errors.)
Indicates an RAI alarm (yellow) from the 
CPE with errors from the line unit or 
network.
Cannot be inhibited.
xxxx-DBER
DS1 Bit Error Rate 
The DS1 BER has exceeded the set 
threshold limits of approximately 10
-6
(xxxx denotes either TUC or TUR. If TUC 
and TUR occur at the same time, then TUC 
displays.)
Select DIS for the DBER system option.
Continued