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.
Summary of Contents for 1202052L1
Page 1: ...TSU 100 TSU 100e User Manual Part Numbers 1202052L1 1202052L2 January 1999 61202052L1 1C ...
Page 18: ...List of Figures xviii TSU 100 User Manual 61202052L1 1 ...
Page 20: ...List of Tables xx TSU 100 User Manual 61202052L1 1 ...
Page 34: ...Chapter 2 Installation 2 10 TSU 100 User Manual 61202052L1 1 ...
Page 48: ...Chapter 3 Operation 3 14 TSU 100 User Manual 61202052L1 1 ...
Page 110: ...Appendix A Understanding SNMP A 6 TSU 100 User Manual 61202052L1 1 ...
Page 114: ...Appendix B Understanding TR 08 B 4 TSU 100 User Manual 61202052L1 1 ...
Page 120: ...Appendix C Network Pinouts C 6 TSU 100 User Manual 61202052L1 1 ...
Page 126: ...Appendix E Specifications E 4 TSU 100 User Manual 61202052L1 1 ...
Page 134: ...Index Index 8 TSU 100 User Manual 61202052L1 1 ...
Page 136: ......