ADTRAN Total Access 3000 Specifications download pdf (Page 32)

Total Access 3000/3010 T1-OR/NIU Installation and Maintenance Practice

24 61181310L2-5D

NOTE

During a UAS condition, ES and SES statistics are inhibited.

Performance Defect Definitions

The defects described in Table 8 are used to calculate the Stored Performance Characteristics.

Path Statistics (-P)

Errored Seconds (ES-P) SF Operation: Count of 1-second intervals containing 1 or

more frame bit (FE), SEF, or AIS errors

ESF Operation: Count of 1-second intervals containing 1 or

more CRC, SEF, or AIDS errors

Severely Errored Seconds (SES-P) SF Operation: Count of 1-second intervals containing more

than 7 frame bit (FE) errors, or 1 or more SEF

or AIS errors

ESF Operation: Count of 1-second intervals containing 319 or

more CRC errors, or 1 or more SEF or AIS

errors

Unavailable Seconds (UAS-P) Count of ten sequential SES errors will trigger a UAS. UAS clears

after 10 sequential seconds without SES errors

Coding Violations (CV-P) SF Operation: Count of frame bit errors

ESF Operation: Count of SCRC errors

Table 8. Performance Defect Definitions

Defect Descriptions

Bipolar Violation

(BPV)

A BPV is the occurrence of a pulse of the same polarity as the previous pulse.

If B8ZS is provisioned, BPVs associated with the B8ZS are excluded from the

count.

Loss of Signal

(LOS)

An LOS is defined by the detection of 175 consecutive “0’s.” When a 12.5 per-

cent ones density is detected (4 ones/32 bits and no 15 consecutive “0’s”), the

LOS status is eliminated.

Table 7. Stored Performance Statistics Descriptions (Continued)

Statistic Description

1 2 ... 27 28 29 30 31 32 33 34 35 36 37 ... 43 44

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ADTRAN Total Access 3000 Specifications Page 32