Testing

152-388-100-02, Issue 2

 

 

TESTING

This section provides information about front-panel system alarms, LOS and AIS response, OCT55 test procedure, and loopback testing.

FRONT-PANEL SYSTEM ALARMS

Table 14 summarizes all possible HiGain 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 page 30. All alarms that are not inhibited will drive the front-panel Status LED to a flashing red alarm state.

Table 14. Front-Panel System Alarms Summary

Front-Panel

Alarm

Description

To Inhibit

Message (a)

PWR FEED

Power Feed Short

A short exists between the Tip and Ring of

Cannot be inhibited.

SHRT (b)

 

the HDSL2 pair.

 

PWR FEED

Power Feed Ground

The HDSL2 loop is grounded.

Cannot be inhibited.

GND (b)

 

 

 

PWR FEED

Power Feed Open

A line power open condition exists.

Cannot be inhibited.

OPEN (b)

 

 

 

LOSW (c)

Loss of Sync Word (d)

The HDSL2 loop has lost synchronization.

Cannot be inhibited.

LLOS (c)

Local Loss of Signal

Loss of the DSX-1 input signal.

Cannot be inhibited.

RLOS (c)

Remote Loss of Signal Loss of the H2TU-R DS1 input signal.

Disable the RDA (Remote Disconnect Alarm) option. The front-panel Status LED still flashes red and the ALRM RLOS message displays to alert you of the LOS state. LOS is sent towards the network from the H2TU-C. This option prevents the common occurrences of a CPE LOS condition from generating recurring alarms and AIS payloads.

LAIS

Local Alarm Indication

Indicates an AIS (all ones) pattern is being

Cannot be inhibited.

 

Signal

transmitted from the local DS1 output

 

 

 

port.

 

 

 

 

 

RAIS

Remote Alarm

Indicates an AIS (all ones) pattern is being

Cannot be inhibited.

 

Indication Signal

received at the H2TU-R DS1 input port.

 

 

 

 

 

LRAI

Line RAI—Remote

Indicates an RAI alarm (yellow) from the

Cannot be inhibited.

 

Alarm Indication at the

CPE with an error-free signal from the line

 

 

H2TU-R (Net signal

unit or network.

 

 

does not have errors.)

 

 

RRAI

Remote RAI—Remote

 

Alarm Indication at the

 

H2TU-R. (Net signal

 

has errors.)

Indicates an RAI alarm (yellow) from the

Cannot be inhibited.

CPE with errors from the line unit or

 

network.

 

xxxx-DBER

DS1 Bit Error Rate

The DS1 BER has exceeded the set

Select DIS for the DBER system option.

 

 

threshold limits of approximately 10-6.

 

 

 

(xxxx denotes either TUC or TUR. If TUC

 

 

 

and TUR occur at the same time, then TUC

 

 

 

displays.)

 

 

 

 

 

 

 

 

Continued

36

June 6, 2000

H2TU-C-388 List 1