ITU Q.723:1988
ITU Q.723:1988 Telephone User Part Formats And Codes
Table of Contents
1Basicformatcharacteristics1.1General
1.2Theserviceinformationoctet
1.3Formatprinciples
2Label
2.1General
2.2Standardtelephonelabel
2.3Optionalnationallabels
3Telephonesignalmessageformatsandcodes
3.1General
3.2HeadingcodeH0
3.3Forwardaddressmessages
3.4Forwardset-upmessages
3.5Backwardset-uprequestmessage
3.6Successfulbackwardset-upinformationmessages
3.7Unsuccessfulbackwardset-upinformationmessages
3.8Callsupervisionmessage
3.9Circuitsupervisionmessage
3.10Circuitgroupsupervisionmessage
3.11Circuitnetworkmanagementmessages
ANNEXA-Chargingmessages
A.1Introduction
A.2Startingpoints
A.3Messagesandprocedures
A.4Formatsandcodes
References