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Alarm Indication Signal - P
Copyright
© Ericsson AB 2005 - All Rights Reserved
Disclaimer
No part of this document may be reproduced in any form without the written permission of the copyright owner.
The contents of this document are subject to revision without notice due to continued progress in methodology, design and manufacturing. Ericsson shall have no liability for any error or damage of any kind resulting from the use of this document.
Contents
1 Overview
1.1 Description
1.2 Prerequisites
2
Procedure
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1Overview
This Operating Instruction concerns alarm handling.
1.1Description
The alarm is a primary alarm. It issued by the managed objects, Sts1SpeTtp and Sts3CspeTtp.
The alarm is generated when a pointer processor detects the pattern "11111111" in bytes H1 and H2 of the Synchronous Transport Signal (STS) Transport overhead for three or more consecutive frames. The alarm indicates that the STS path is affected by bit errors.
As a consequence of the fault, the traffic on the affected STS path is lost.
The likely cause is that the STS is affected by a fault in the remote node.
1.2Prerequisites
This section provides information on the documents, tools and conditions that apply to the procedure.
1.2.1Documents
Before starting this procedure, ensure that you have read the document, System Safety Information.
2Procedure
Note:
Locate the fault while there is low traffic running on the link because localization of the fault affects all the traffic.
Note:
Configure alarm reporting by setting the aisPReporting attribute in the managed objects, Sts1SpeTtp and Sts3CspeTtp. It is disabled by default.
If the fault remains, consult the next level of maintenance support. Further actions are outside the scope of this operating instruction.
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