LTPH-UM-1109-01, Issue 1

Front Panel

 

 

Table 2 lists the front-panel display messages. The four-character display reports the code of a pertinent alarm, loopback, or diagnostic message and, in some cases, is followed by a second four-character message that modifies the first message with a value or current configuration setting.

Table 2. Front-Panel Display Messages

Message

Full Name

Description

 

 

SYSTEM ALARM MESSAGES

 

ACO

Alarm Cutoff

A system alarm has occurred and has been retired to an ACO condition by

 

 

pressing the SEL pushbutton on the H2TU-C front panel.

ALRM

Alarm Condition Exists

A system alarm condition is in effect.

DBER

DS1 Bit Error Rate

A system DS1 BER alarm is in effect and remains in effect until cleared.

HBER

HDSL2 Block Error Rate

A system HDSL2 Block Error Rate alarm is in effect.

LA

Loop Attenuation

Indicates that the attenuation on the HDSL2 loop has exceeded the

 

 

maximum threshold value.

LAIS

Line Alarm Indication Signal

Indicates an AIS (unframed all ones) pattern, is being received or

 

 

transmitted at the H2TU-C DS1 input or output ports.

LLOS

Line (Unit) Loss of Signal

Indicates that no signal is detected at the DSX-1 input to the H2TU-C.

 

 

Causes a system alarm.

LOSW

Loss of Sync Word

Indicates that the HDSL2 loop has lost synchronization.

LRAI

Line RAI

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.

MAL

Margin Alarm

The margin on HDSL2 loop has dropped below the threshold

 

 

(0 to 15 dB) as set by the operator.

PWR FEED GND

Ground

The HDSL2 loop is grounded.

PWR FEED OPEN

Open

Indicates a line power open condition.

PWR FEED SHRT

Short

Indicates a short between the Tip and Ring of the HDSL2 pair.

PRMF

Performance Report Messaging -

H2TU-R PRM-FE BER threshold has been exceeded.

 

Far End

 

PRMN

Performance Report Messaging -

H2TU-R PRM-NE BER threshold has been exceeded.

 

Near End

 

RAIS

Remote Alarm Indication Signal

Indicates an AIS an (unframed all ones) pattern is being received at the

 

 

H2TU-R DS1 input port.

RLOS

Remote (Unit) Loss of Signal

Indicates that no signal is detected at the DS1 input to the H2TU-R. Causes

 

 

a system alarm.

RRAI

Remote RAI

Indicates an RAI alarm (yellow) from the CPE with errors from the line unit

 

 

or network.

TUC

Transmission Unit Central Office

Accompanies the HBER, MAL, and LA alarm and indicates that the alarm

 

 

has occurred at the H2TU-C central office unit.

TUR

Transmission Unit Remote End

Accompanies the HBER, MAL, and LA alarm and indicates that the alarm

 

 

has occurred at the H2TU-R remote unit.

 

 

LOOPBACK MESSAGES

 

CLOC

Customer Local Loopback

Signal from customer is looped back to the customer at the H2TU-R.

COLB

Central Office Loopback

Dual loopback at the H2TU-C.

CREM

Customer Remote Loopback

Signal from customer is looped back to the customer at H2TU-C-231.

NLOC

Network Local Loopback

DSX-1 signal is looped back to the network at the H2TU-C.

 

 

 

 

 

Continued

H2TU-C-231 List 2

January 9, 2002

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