Testing; System Alarms - ADC HiGain H2TU-C-319 List 4E User Manual

Testing

T
ESTING
This section provides information about front-panel system alarms, LOS and AIS response, OCT55 test
procedure, and loopback testing.
S A
YSTEM LARMS
Table 21 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
page 44). All alarms that are not inhibited will drive the front-panel Status LED to a flashing red alarm state.
Front-Panel
Alarm
(a)
Message
(b)
PWR FEED SHRT Power Feed Short
(b)
PWR FEED GND Power Feed Ground
(b)
PWR FEED OPEN Power Feed Open
(b)
LOSW Loss of Sync Word
MTA Metallic Test Access
SPTE Split Equipment
SPTF Split Facilities
(b)
LLOS Local Loss of Signal
(b)
RLOS Remote Loss of Signal Loss of the H2TU-R DS1 input signal.
LAIS Local Alarm Indication
Signal
RAIS Alarm Indication Signal
at the H2TU-R
RRAI Remote Alarm
Indication
LRAI Remote Alarm
Indicator - Customer
Installation
TRCI Remote Alarm
Indication - Customer
Installation
xxx-DBER DS1 Bit Error Rate
PRMF Performance Report
Messaging - Far End
PRMN Performance Report
Messaging - Near End
52
"Using the Performance Screens to View Alarm Data" on
Table 21. Front-Panel 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.
(c)
The HDSL2 loop has lost synchronization.
The H2TU-C is in its MTA/LOSW test state.
A test mode initiated by the HMU which splits the
AUX port's DSX-1 payload and sends it to the MUX
port.
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.
Loss of the DSX-1 input signal.
Indicates an AIS (all ones) pattern is being received
at the H2TU-C input port.
Indicates an AIS (all ones) pattern is being received
at the H2TU-R DS1 input port.
Remote Alarm Indication at the H2TU-R Indicates an
RAI alarm (yellow LED) from the CPE with errors
from the line unit or network.
Indicates an RAI alarm (yellow LED) from the CPE
with an error-free signal from the line unit or
network.
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.
The DS1 BER has exceeded the set 24-hour
threshold limit of approximately 10
either TUC or TUR. If TUC and TUR occur at the
same time, then TUC displays.)
Indicates H2TU-R PRM-FE BER threshold is
exceeded.
Indicates H2TU-R PRM-NE BER threshold is
exceeded.
January 9, 2002
LTPH-UM-1049-02, Issue 2
To Inhibit:
Cannot be inhibited.
Cannot be inhibited.
Cannot be inhibited.
Cannot be inhibited.
Sets MTA option to disabled.
Sets ADS1 option to MUX or
CTHR.
Sets ADS1 option to MUX or
CTHR.
Cannot be inhibited.
Cannot be inhibited.
Cannot be inhibited.
Cannot be inhibited.
Cannot be inhibited.
Cannot be inhibited.
Cannot be inhibited.
Select DIS for the DBER
-6
. (xxx denotes system option.
Set DBER threshold to DIS.
Set DBER threshold to DIS.
H2TU-C-319 List 4E
Continued