ITU Q.703:1996
ITU Q.703:1996 Signalling Link A description of the functions and procedures for and relating to the transfer of messages over one signalling data link.
Table of Contents
1General1.1Introduction
1.2Signalunitdelimitationandalignment
1.3Errordetection
1.4Errorcorrection
1.5Initialalignment
1.6Signallinglinkerrormonitoring
1.7Linkstatecontrolfunctions
1.8Flowcontrol
2Basicsignalunitformat
2.1General
2.2Signalunitformat
2.3Functionandcodesofthesignalunitfields
2.4Orderofbittransmission
3Signalunitdelimitation
3.1Flags
3.2Zeroinsertionanddeletion
4Acceptanceprocedure
4.1Acceptanceofalignment
4.2Errordetection
5Basicerrorcorrectionmethod
5.1General
5.2Acknowledgements(positiveacknowledgementand
negativeacknowledgement)
5.3Retransmission
6Errorcorrectionbypreventivecyclicretransmission
6.1General
6.2Acknowledgements
6.3Preventivecyclicretransmission
6.4Forcedretransmission
7Initialalignmentprocedure
7.1General
7.2Initialalignmentstatusindications
7.3Initialalignmentprocedure
7.4Provingperiods
8Processoroutage
9Level2flowcontrol
9.1General
9.2Detectionofcongestion
9.3Procedureinthecongestionsituation
9.4Congestionabatementprocedure
10Signallinglinkerrormonitoring
10.1General
10.2Signaluniterrorratemonitor
10.3Alignmenterrorratemonitor
11Level2codesandpriorities
11.1Linkstatussignalunit
11.2Transmissionprioritieswithinlevel2
12Statetransitiondiagrams,abbreviationsandtimers
12.2Abbreviations
12.3Timers
ANNEXA-Additionsforanationaloptionforhighspeed
signallinglinks
A.1Introduction
A.4Acceptanceprocedure