ADCP-61-471 • Issue 4 • June 2000 • Section 2: Operation and Maintenance

TAP-102

Page 3 of 11

Table 102-1. DS1 Mon Type Descriptions

MON TYPE

MEANING

LOCATION

DESCRIPTION

CVL

Code Violation Line

NEND

Count of Bipolar Violations (BPV) and excessive

 

 

 

zeros (EXZ) in the DS1 signal. Note: The maximum

 

 

 

rate of indications across HDSL loops that the far end

 

 

 

can report is 166.7 BPV per second (10,000 per

 

 

 

minute).

 

 

 

 

LOSS

Loss Of Signal

NEND

A second in which one or more Loss Of Signal defects

 

Second

 

occurred.

 

 

 

 

ESL

Errored Second Line

NEND

A second in which there occurred one or more BPVs,

 

 

 

one or more EXZs, or one or more LOS defects.

 

 

 

 

SESL

Severely Errored

NEND

A second in which more than some user specified

 

Second Line

 

value of CVLs or one or more LOS defects occurred.

 

 

 

 

FCP

Failure Count Path

NEND

A count of Loss Of Frame (LOF) or Alarm Indication

 

 

 

Signal (AIS) failures within the interval. A failure is

 

 

 

counted when the failure condition transitions from

 

 

 

OFF to ON. Failure count is independent of the

 

 

 

duration (in seconds) of the failure condition.

 

 

 

 

CVP

Code Violation Path

NEND

Count of (FE) Frame sync Errors in SF format or

 

 

 

count of CRC errors in ESF format.

 

 

 

 

AISSP

AIS Second Path

NEND

A second containing one or more AIS defects.

 

 

 

 

SASP

SEF/AIS Second Path

NEND

A second containing one or more AISSPs or one or

 

 

 

more SEF (Severely Errored Framing/OOF) defects.

 

 

 

 

ESP

Errored Second Path

NEND

SF framing format: this is a second in which there

 

 

 

occurred one or more FE events, one or more SEF

 

 

 

defects, or one or more AIS defects.

 

 

 

ESF framing format: this is a second in which there

 

 

 

occurred one or more CVP errors, one or more SEF

 

 

 

defects, or one or more AIS defects.

 

 

 

 

SESP

Severely Errored

NEND

SF framing format: this is a second in which there

 

Second Path

 

occurred more than eight FE events, one or more SEF

 

 

 

defects, or one or more AIS defects.

 

 

 

ESF framing format: this is a second in which there

 

 

 

occurred more than some user specified value of CVP

 

 

 

errors, one or more SEF defects, or one or more AIS

 

 

 

defects.

 

 

 

 

Note: DS1 Path Parameters are collected at the HLXC for both directions, as shown in Figure 102-7.

Note: Far-end parameters are not derived from defects detected in the incoming signal but rather from the PRM (Performance Report Messages) embedded in the incoming signal from the far end. A Remote Alarm Indication condition disallows reception of a valid PRM. The framing format must be ESF for FEND information to be transmitted and displayed.

Note: For complete information on counts, refer to ANSI T1.231.

(continued)

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© 2000, ADC Telecommunications, Inc.