Testing; Front-Panel System Alarms; Front-Panel System Alarms Summary - ADC PAIRGAIN HiGain HDSL2 Manual

152-231-115-03, Revision 03
T
ESTING
This section provides information about front-panel system alarms, LOS/AIS response, OCT55 test procedure,
and loopback testing.
F -P S
RONT ANEL
Table 20 summarizes all possible HDSL2 system alarms (7 HDSL2 and 9 DS1) in order of priority as they appear
on the front panel. These alarms correlate with the alarms displayed on the alarm history screens (see
Performance Screens to View Alarm Data"
analysis. More than one alarm condition can exist at any given time, but only one message can be displayed on
the front panel. For multiple alarms, only the highest priority alarm displays.
Front-panel
Alarm
(a)
Message
PWR FEED Short
(b)
SHRT
PWR FEED Ground
(b)
GND
PWR FEED Open
(b)
OPEN
(b)
LOSW Loss of Sync Word
(b)
LLOS Local Loss of Signal
(b)
RLOS Remote Loss of Signal
LAIS Local Alarm Indication
Signal
RAIS Remote Alarm Indication
Signal
RRAI Remote RAI—Remote
Alarm Indication at the
H2TU-R
TRCI Transmit RAI-CI—Remote
Alarm Indication at the
H2TU-R
(b)
MAL Margin Alarm
(b)
LA Loop Attenuation
DBER DS1 Bit Error Rate
(b)
HBER HDSL2 Block Error Rate
H2TU-C-231 List 1E
A
YSTEM LARMS
beginning on
Table 20.

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.
Loss of the DSX-1 input signal.
Loss of the H2TU-R DS1 input signal.
Indicates an AIS (all ones) pattern is being
transmitted from the local DS1 output port.
Indicates an AIS (all ones) pattern is being
received at the H2TU-R DS1 input port.
Indicates an RAI alarm (yellow) from the CPE
with errors from the line unit or network.
Upon reception of an RAI (yellow alarm) from the
CPE, the H2TU-R sends RAI-CI towards 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 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.
The DS1 BER has exceeded the set threshold
limits of approximately 10
The HDSL2 BER has exceeded the set threshold
-6
limits of 10 or 10
April 21, 2000
page 40), however, the screens provide a more detailed
-6
.
- 7
.

Testing

"Using the
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.
Set the Margin Alarm Threshold
option to 0 (zero).
Set the HDSL2 Loop Attenuation
Threshold option to zero.
Select DIS for the DBER system
option.
Select NONE for the HBER system
option.
45