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Table 5-26 – ADTRAN MX410 User Manual

Page 97

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MX410/MX412 System Manual

Menu Descriptions

61189500L1-1B

PRELIMINARY 5-47

1. FE (Frame bit Error): This parameter indicates the occurrence of a frame bit error in the received frame bit pattern.

2. CS (Controlled Slip): This parameter indicates the replication or deletion of the 192 payload bits of a DS1 frame by

the receiving unit.

3. SEF (Severely Errored Frame): This parameter indicates that two or more frame bit errors are detected in a window.

4. AIS (Alarm Indication Signal): This parameter indicates the detection of an unframed signal with a 1s density of at

least 99.9% for a time.

5. CRC-6 (Cyclic Redundancy Check) error - used in ESF mode only: This parameter indicates the existence of a

CRC-6 code that is not identical to the corresponding locally calculated code.

Table 5-26. Performance Monitoring Definitions

T1 PM Parameter

Definition

Description

CV-L

Code Violation - Line

This parameter indicates the number of Bipolar Viola-
tions (BPVs) and Excessive Zeros (EXZs) that have
occurred during the accumulation period.

ES-L

Errored Seconds - Line

This parameter indicates the number of seconds for
which one or more Line Coding Violations (CV-Ls), or
one or more Loss of Signal (LOS) defects occurred.

SES-L

Severely Errored Seconds - Line

This parameter indicates the number of seconds with
1544 or more CV-Ls or one or more LOS defects.

LOSS-L

Loss of Signal Second - Line

This parameter indicates the number of seconds for
which one or more LOS defects occurred.

CV-P

Code Violation - Path

SF Mode: This parameter indicates the number of
frame synchronization bit errors that have occurred
during the accumulation period.
ESF Mode: This parameter indicates the number of
CRC-6 errors that have occurred during the accumula-
tion period.

ES-P

Errored Seconds - Path

SF Mode: This parameter indicates the number of
seconds containing any of the following:

• FE errors

1

• CS events

2

• SEF defects

3

• AIS defects

4

ESF Mode: This parameter indicates the number of
seconds containing any of the following:

• CRC-6 errors

5

• CS events
• SEF defects
• AIS defects

SES-P

Severely Errored Seconds - Path

SF Mode: This parameter indicates the number of
seconds with 8 or more FE events or one or more SEF
or AIS defects.
ESF Mode: This parameter indicates the number of
seconds with 320 or more CRC-6 errors or one or more
SEF or AIS defects.

SAS-P

Severely Errored Frame/AIS
Second - Path

This parameter indicates the number of seconds
containing one or more SEF defects or one or more AIS
defects.

UAS-P

Unavailable Second - Path

This parameter indicates the number of seconds for
which the DS1 path contains 10 contiguous SESs.

CSS-P

Controlled Slip Second - Path

This parameter indicates the number of seconds
containing one or more controlled frame slips.