Testing; System Alarms - ADC H4TU-C-231-L5A User Manual

LTPH-UM-1253-01
T
ESTING
This section provides information about system alarms, LOS and AIS response, OCT55 test procedure, and
loopback testing.
S A
YSTEM LARMS
Table 16 provides a summary of the system alarms displayed on the H4TU-C, H4D doubler, and H4TU-R alarm
history screens (see "Using the Performance Screens to View Alarm Data" on page
Message on Screen Alarm
SH0RT Power Feed Short
GND Power Feed Ground
OPEN Power Feed Open
LOSW-LP1 or Loop(n)-Loss of Sync Word HDSL4 Loop 1 or Loop 2 has lost synchronization.
LOSW-LP2
LLOS Line (Unit) Loss of Signal
RLOS Remote (Unit) Loss of
Signal
LAIS Line Alarm Indication Signal Indicates an AIS (unframed all ones) pattern is
RAIS Remote Alarm Indication
Signal
LRAI Line RAI—Remote Alarm
Indication at the H4TU-R
(Net signal does not have
errors.)
RRAI Remote RAI—Remote
Alarm Indication at the
H4TU-R (Net signal has
errors.)
TX RAI-CI Transmit RAI-CI—Remote
Alarm Indication at the
H4TU-R
DBER DS1 Bit Error Rate
LOF Loss of Frame
H4TU-C-231 List 5AA
Table 16. System Alarms Displayed on Alarm History Screens
Description
A short exists between HDSL4 Loop 1 and
Loop 2.
One of the HDSL4 loops is grounded.
A line power open condition exists.
The span closest to the network has highest
priority.
Loss of the DSX-1 input signal at the H4TU-C.
Loss of the DS1 input signal at the H4TU-R.
being received at the H4TU-C DS1 input port.
Indicates an AIS (unframed all ones) pattern is
being received at the H4TU-R DS1 input port.
Indicates an RAI alarm (yellow) from the CPE with
an error-free signal from the line unit or network.
RAI signal is transmitted towards the network.
Indicates an RAI alarm (yellow) from the CPE with
errors from the line unit or network.
Upon reception of an RAI (yellow) from the CPE,
the H4TU-R sends an RAI-CI toward the network if
the network signal received at the H4TU-R is clear.
If the network signal is impaired (LOS, AIS, or
LOF), then the RAI is passed on to the network
unaltered.
The DS1 BER has exceeded the set 24-hour
threshold limit of approximately 10
The DS1 input does not contain the ESF or SF
frame pattern setting of the FRMG option.
October 15, 2003
30).
To Enable:
Always enabled.
Always enabled.
Always enabled.
Always enabled.
Always enabled.
Always enabled.
Always enabled.
Always enabled.
Select DIS for the RACI
option.
Always enabled.
Select ENA for the
RACI option.
Select ENA for the
-6
DBER system option.
Change FRMG option
to SF or ESF.

Testing

Continued
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