ADTRAN SLC-5 U-BR1TE III User Manual download pdf (Page 112)

Appendix B. Understanding TR-08

B-2

TSU 100 User Manual 61202052L1-1

The following table explains what conditions trigger alarms and how

alarms are processed when received by the TSU 100.

Table B-1.

Alarm Conditions

Name Explanation

FELP When the TSU 100 receives a FELP alarm, it will loop

the incoming data directly to the outgoing data. LINE

ON is placed in history. The alarms and loopback are

cleared when FELP is no longer received.

Loss of Data The TSU 100 will send MINOR ALARM and the A

SHELF ALARM for 2.5s when it quits receiving the

data link on the T-Span. It will also report TR-08 DL

Down in the history. After 2.5s, MAJOR ALARM, A

SHELF ALARM are sent across the Data Link.

OOF The TSU will send MINOR ALARM and A SHELF

ALARM upon receiving an out-of-frame condition.

TR-08 DL Down and RED ALARM are declared in

history for severe framing errors. After 2.5s, MAJOR

ALARM, A SHELF ALARM are sent across the Data

Link.

Loss of Signal The TSU 100 will send MINOR ALARM and the A

SHELF ALARM for 2.5s when it quits receiving a

signal from the far end. It will also report TR-08 DL

Down and LOS in the history. After 2.5s, MAJOR

ALARM, A SHELF ALARM are sent across the Data

Link, and RED ALARM is declared in history.

BPVs BPVs that are received at a rate greater than the

threshold set under TR-08 options, will cause

MINOR ALARM and A SHELF ALARM to be sent

on the DL. If the BPVs remain above the threshold for

2.5s, the TSU 100 will send MAJOR ALARM and on

the DL. No events are placed in history.

Protection

Line Switch

The TSU will not respond to this alarm.

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ADTRAN SLC-5 U-BR1TE III User Manual Page 112