Chapter 5. Statistics

The following alarm counts are provided in this menu:

Condition

Description

 

 

LOP

The number of times the unit has failed to find a

 

valid VT pointer.

 

 

AIS

The number of times the unit has received a path

 

alarm indication signal. VT-Path AIS is defined as

 

all ones in bytes V1, V2, V3, and V4 as well as all

 

ones in the entire VT synchronous payload

 

envelope. A VT-Path AIS failure is declared when

 

the VT-Path AIS defect persists for 2.5 +/- 0.5

 

seconds.

 

 

RDI

Number of times the unit has received a VT path

 

remote defect indication. VT-RFI is declared

 

when the incoming VT path RDI lasts for 2.5 +/-

 

0.5 seconds.

 

 

RFI

Number of times the unit has received a VT path

 

remote failure indication. VT-RFI is declared

 

when the incoming VT path RFI lasts for 2.5 +/-

 

0.5 seconds.

 

 

SLM

Number of times the unit has detected a SLM

 

alarm condition from the VT path. A received

 

signal label is mismatched if it does not equal the

 

locally provisioned value or the value “equipped

 

non-specific”.

 

 

UEQ

Number of times the unit has detected a UEQ

 

alarm condition from the VT path. The VT path is

 

not provisioned. Byte V5 of the STS path

 

overhead is set to zero.

 

 

The count given reflects the number of times the alarm or state has occurred (rather than the number of seconds the alarm was active).

61200659L1-1

MX2800 STS-1 User Manual

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ADTRAN 4200659L7, 4200659L1, 4175043L2, 4200659L5, 4200659L8, 4200659L2, 4200659L3, 4200659L6, 4200659L4, 1200657L2, 1200291L1 Ais
Page 112 Page 114

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