ITU I.520:1993
ITU I.520:1993 General Arrangements For Network Interworking Between Isdns
Table of Contents
1Introduction2Scope
3Requiredinformationandinformationhandling
4DescriptionofISDN-ISDNinter-workingconfigurations
4.1ISDN-ISDNinterfacewherecircuitmodebearer
servicesareprovidedbybothISDNs
4.2ISDN-ISDNInterfacewherebothISDNsprovide
X.31caseBbasedpackedmodebearerservices
4.3ISDN-ISDNinterfacewhereacircuitmodebearer
serviceisprovidedbyoneISDNtoaccesseither
aPSPDN,oraPHandanX.31caseBpacketmode
bearerserviceprovidedbyanotherISDN
4.4ISDN-ISDNinter-workingviaatransitnetwork
4.5ISDN-ISDNinterfaceforadditionalpacketmode
bearerservices
4.6ISDN-ISDNinterfacewhereanX.31caseBbased
packetmodebearerserviceisprovidedonone
ISDNandanadditionalpacketmodebearerservice
isrequestedonanotherISDN
4.7ISDN-ISDNinterfaceforcircuitmodetoadditional
packetmodeservice
5Inter-workingfunctions
5.1Echocontrolprocessingandspeechprocessing
5.2Generationofin-bandtonesandannouncementsfor
speechand3.1kHzaudiobearerservices
5.3CallnegotiationbetweenISDNs
5.4Compatibilitycheckingbetweenendusersof
differentISDNs
6Functionalinter-workingrequirementsfordata
transmissionservices
7References
AppendixIISDNconnectionsinvolvingrestricted64kbit/s
transfercapability
I.1General
I.2Inter-workingwithISDNsprovidingrestricted
64kbit/s
I.3Considerationsforterminaldesignedtooperate
withrestricted64kbit/stransfercapability