Chapter 3. Configuration

STS-1 Alarms

Alarm

Description

 

 

LOS

(Loss of Signal)

 

The unit has lost the network receive signal.

 

 

LOF

(Loss of Framing)

 

The unit detects a framing loss from the

 

network.

 

 

LOP

(Loss of Pointer)

 

The unit is unable to detect a valid pointer in the

 

receive signal.

 

 

LOMF

(Loss of Multiframe)

 

The unit detects loss of H4 multiframe from the

 

network.

 

 

AIS-L

(Line Alarm Indication Signal)

 

The unit is receiving a line alarm indication

 

signal. The Section Terminating Equipment

 

generates AIS-L after detecting LOS or LOF.

 

 

AIS-P

(Path Alarm Indication Signal)

 

The unit is receiving a path alarm indication

 

signal. AIS-P is defined as all ones in bytes H1,

 

H2, and H3 as well as all ones in the entire STS

 

synchronous payload envelope.

 

 

RFI-L

(Line Remote Failure Indication)

 

The unit is receiving a line remote failure

 

indication. RFI-L is declared when the incoming

 

line remote defect indication (RDI-L, “110”

 

pattern in bits 6, 7, and 8 of the K2 line overhead

 

byte) lasts for 2.5 +/- 0.5 seconds.

 

 

RFI-P

(Path Remote Failure Indication)

 

The unit is receiving a path remote failure

 

indication. RFI-P is declared when the incoming

 

path remote defect indication (RDI-P, “1” in bit 5

 

of the G1 path overhead byte for contiguous

 

frames) lasts for 2.5 +/- 0.5 seconds.

 

 

61200659L1-1

MX2800 STS-1 User Manual

3-19

Page 64 Page 66
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ADTRAN 4200659L7, 4200659L1, 4175043L2, 4200659L5, 4200659L8, 4200659L2, 4200659L3, 4200659L6 STS-1 Alarms Description, Ais-L
Page 64 Page 66

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