Testing, System alarms, Front-panel system alarms summary – ADC HiGain H2TU-C-319 List 4E User Manual
Page 60: Esting, Ystem, Larms
Testing
LTPH-UM-1049-02, Issue 2
52
January 9, 2002
H2TU-C-319 List 4E
T
ESTING
This section provides information about front-panel system alarms, LOS and AIS response, OCT55 test
procedure, and loopback testing.
S
YSTEM
A
LARMS
summarizes all possible 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
“Using the Performance Screens to View Alarm Data” on
). All alarms that are not inhibited will drive the front-panel Status LED to a flashing red alarm state.
Table 21.
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
(b)
Power Feed Ground
The HDSL2 loop is grounded.
Cannot be inhibited.
PWR FEED OPEN
(b)
Power Feed Open
A line power open condition exists.
Cannot be inhibited.
LOSW
(b)
Loss of Sync Word
(c)
The HDSL2 loop has lost synchronization.
Cannot be inhibited.
MTA
Metallic Test Access
The H2TU-C is in its MTA/LOSW test state.
Sets MTA option to disabled.
SPTE
Split Equipment
A test mode initiated by the HMU which splits the
AUX port’s DSX-1 payload and sends it to the MUX
port.
Sets ADS1 option to MUX or
CTHR.
SPTF
Split Facilities
A test mode initiated by the HMU which splits the
facility DS1 payload from the AUX port #1 and sends
it to the MUX port.
Sets ADS1 option to MUX or
CTHR.
LLOS
(b)
Local Loss of Signal
Loss of the DSX-1 input signal.
Cannot be inhibited.
RLOS
(b)
Remote Loss of Signal
Loss of the H2TU-R DS1 input signal.
Cannot be inhibited.
LAIS
Local Alarm Indication
Signal
Indicates an AIS (all ones) pattern is being received
at the H2TU-C input port.
Cannot be inhibited.
RAIS
Alarm Indication Signal
at the H2TU-R
Indicates an AIS (all ones) pattern is being received
at the H2TU-R DS1 input port.
Cannot be inhibited.
RRAI
Remote Alarm
Indication
Remote Alarm Indication at the H2TU-R Indicates an
RAI alarm (yellow LED) from the CPE with errors
from the line unit or network.
Cannot be inhibited.
LRAI
Remote Alarm
Indicator - Customer
Installation
Indicates an RAI alarm (yellow LED) from the CPE
with an error-free signal from the line unit or
network.
Cannot be inhibited.
TRCI
Remote Alarm
Indication - Customer
Installation
Upon reception of an RAI (yellow LED) 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.
Cannot be inhibited.
xxx-DBER
DS1 Bit Error Rate
The DS1 BER has exceeded the set 24-hour
threshold limit of approximately 10
-6
. (xxx denotes
either TUC or TUR. If TUC and TUR occur at the
same time, then TUC displays.)
Select DIS for the DBER
system option.
PRMF
Performance Report
Messaging - Far End
Indicates H2TU-R PRM-FE BER threshold is
exceeded.
Set DBER threshold to DIS.
PRMN
Performance Report
Messaging - Near End
Indicates H2TU-R PRM-NE BER threshold is
exceeded.
Set DBER threshold to DIS.
Continued