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ITU Q.71:1993

ITU Q.71:1993 Isdn Circuit Mode Switched Bearer Services Describes functional capabilities and information flows needed to support the service description. It provides information on the functions in ISDN entities and the information flows between the entit

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Table of Contents

1Introduction
1.1General
1.2Definitions
1.3Symbolsandabbreviations
1.4ServicessupportedbythisRecommendation
1.5Serviceinvocation
2Callset-upandrelease
2.1Functionalmodel
2.2Informationflowsrequiredforen-blocand
digit-by-digitsendingcallset-upandcall
release
2.3SDLs
2.4Inter-workingbetweenpublicandprivateISDNs
2.5Functionalentityactions
2.6AdditionalFEAsrequiredfordigit-by-digitcall
set-upcases
2.7Allocationoffunctionstophysicalentities
AnnexAInteractionwithSupplementaryServices

Abstract

Describes functional capabilities and information flows needed to support the service description. It provides information on the functions in ISDN entities and the information flows between the entities which are required to provide call set-up and call release procedures.

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