Testing; System Alarms - ADC HiGain H2TU-C-202 User Manual

Testing

T
ESTING
This section provides information about system alarms, LOS and AIS response, OCT55 test procedure, and
loopback testing.
S A
YSTEM LARMS
Table 23 provides a summary of the system alarms displayed on the H2TU-C alarm history screens (see
the Performance Screens to View Alarm Data" on page
Message on Screen Alarm
SHORT Power Feed Short
GROUND Power Feed Ground
OPEN Power Feed Open
LOSW Loss of Sync Word
LLOS Line (Unit) Loss of Signal
RLOS Remote (Unit) Loss of
Signal
LAIS Line Alarm Indication Signal Indicates an AIS (unframed all ones) pattern
RAIS Remote Alarm Indication
Signal
TX RAI-CI Transmit RAI-CI—Remote
Alarm Indication at the
H2TU-R
RRAI Remote RAI—Remote
Alarm Indication at the
H2TU-R
LOF Loss of Frame
DBER DS1 Bit Error Rate
PRM-FE Performance Report
Messaging - Far End
PRM-NE Performance Report
Messaging - Near End
HBER HDSL2 Block Error Rate
MAL Margin Alarm
LA Loop Attenuation
40
32).
Table 23. System Alarms Summary
Description
A short exists between the Tip and Ring of
the HDSL2 pair.
The HDSL2 loop is grounded.
A line power open condition exists.
The HDSL2 loop has lost synchronization.
Loss of the DSX-1 input signal.
Loss of the H2TU-R DS1 input signal.
is being received at the H2TU-C DS1 input
port.
Indicates an AIS (unframed all ones) pattern
is being received at the H2TU-R DS1 input
port.
Upon reception of an RAI (yellow) from the
CPE, the H2TU-R sends RAI-CI toward the
network if the network signal received at the
H2TU-R is clear.
If the network signal is impaired (LOS, AIS,
or LOF), then the RAI is passed on to the
network unaltered.
Indicates an RAI alarm (yellow) from the CPE
with errors from the line unit or network.
The DS1 input does not contain the ESF or SF
frame pattern setting of the FRMG option.
The DS1 BER has exceeded the set threshold
limits of approximately 10
Indicates H2TU-R PRM-FE BER threshold is
exceeded.
Indicates H2TU-R PRM-NE BER threshold is
exceeded.
The HDSL2 BER has exceeded the set
threshold limits of 10
The margin on the HDSL2 loop has dropped
below the minimum threshold value set for
the system.
The attenuation on the HDSL2 loop has
exceeded the maximum value set for the
HDSL2 loop attenuation threshold.
June 6, 2003
To Inhibit
Cannot be inhibited.
Cannot be inhibited.
Cannot be inhibited.
Cannot be inhibited.
Cannot be inhibited.
Cannot be inhibited.
Cannot be inhibited.
Cannot be inhibited.
Cannot be inhibited.
Cannot be inhibited.
Change FRMG option to
AUTO or UNFR.
Select DIS for the DBER
-6
. system option.
Set DBER threshold to DIS.
Set DBER threshold to DIS.
Select NONE for the HBER
-6 - 7
or 10 . system option.
Set the Margin Alarm
Threshold option to 0 (zero).
Set the HDSL2 Loop
Attenuation Threshold option
to zero.
LTPH-UM-1208-01
"Using
H2TU-C-202 List 7G