Monitoring System Activity and Performance152-388-100-02, Issue 2

 

 

Table 11. DS1 Alarm Descriptions

 

 

 

Screen Alarm

Front-Panel Alarm

Description

 

H2TU-C DS1 ALARMS (Figure 21 on page 31)

 

 

 

LLOS (a)

LLOS

Local Loss of Signal—Loss of the H2TU-C DSX-1 input signal.

LAIS (a)

LAIS

Local Alarm Indication Signal—Indicates an AIS (all ones) pattern is transmitted from the

 

 

local DS1 output port. The ALMP option determines whether AIS (default) or LOS is sent

 

 

towards the CPE.

DBER

DBER

Bit Error Rate—The DS1 BER has exceeded the built-in 24-hour threshold limits of

 

 

approximately 10-6.

LOF

LOF

Loss of Frame—Indicates the incoming DS1 frame pattern is other than the one selected,

 

 

ESF or SF, by the FRMG option. Only occurs if the FRMG option is set to SF or ESF.

H2TU-R DS1 ALARMS (Figure 22 on page 31)

RLOS (b)

RLOS

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

RAIS

RAIS

Remote Alarm Indication Signal—Indicates an AIS (all ones) pattern is being transmitted

 

 

from the remote DS1 output port. By default (see Figure 25 on page 38) AIS-CI (b)is sent

 

 

towards the network.

RAI

RRAI

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

 

 

or network.

LRAI

LRAI

Line RAI—Indicates an RAI alarm (yellow) from the CPE with an error-free signal from the

 

 

line unit or network.

PRM-NE

PRMN

Performance Report Messaging - Near End—The count of the PRM-NE register at the

 

 

H2TU-R exceeds the 10-6BER threshold at 648 events since 12:00:00 AM.

PRM-FE

PRMF

Performance Report Messaging - Far End—The count of the PRM-FE register at the

 

 

H2TU-R exceeds the 10-6BER threshold at 648 events since 12:00:00 AM.

DBER

DBER

Bit Error Rate—The DS1 BER has exceeded the built-in 24-hour threshold limits of

 

 

approximately 10-6.

LOF

LOF

Loss of Frame—Indicates the incoming DS1 frame pattern is other than the one selected,

 

 

ESF or SF, by the FRMG option. Only occurs if the FRMG option is set to SF or ESF.

 

 

 

(a)Issues a minor alarm (sent to the management unit or the backplane), if enabled.

(b)AIS-CI is a modified AIS alarm pattern. Equipment not suited to detect AIS-CI still detects this signal as an AIS. AIS-CI is sent toward the network indicating that an LOS (RLOS) or AIS (RAIS) has been received from the CPE.

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June 6, 2000

H2TU-C-388 List 1