ECMA/TR 81 : 1ED 2000

1 Scope
2 References
3 Definitions
   3.1 Corporate telecommunication Network (CN)
   3.2 Internet
   3.3 Intranet
   3.4 Internet Protocol (IP)
   3.5 IP network
   3.6 Private Integrated Services Network (PISN)
   3.7 Private Integrated services Network eXchange
        (PINX)
   3.8 Switched Circuit Network (SCN)
   3.9 Tunnelling
4 Acronyms
5 Introduction
   5.1 Background
   5.2 Types of network
   5.3 Arrangements for interworking of SCNs and IP
        networks
   5.4 Arrangements for interconnection of SCN components
        over IP networks
6 General principles of multimedia communication over an
   IP network
   6.1 Architecture
        6.1.1 Media processing and packetization (MPP)
               functional entity
        6.1.2 Resource control (RC) functional entity
        6.1.3 Session control (SC) functional entity
        6.1.4 SC-redirect (SC-R), SC-proxy (SC-P) and
               RC-proxy (RC-P) functional entities
        6.1.5 Admission control (AC) functional entities
        6.1.6 Identity resolution (IR) functional entity
        6.1.7 Registrar (RGR) and registrant (RGT)
               functional entities
        6.1.8 Generic functional architecture
               (non-interworking)
        6.1.9 Physical realizations of generic functional
               architecture for multimedia communication
               over an IP network (non-interworking)
        6.1.10 Generic functional architecture for
               interworking with an SCN
        6.1.11 Physical realizations of generic functional
               architecture for interworking with an SCN
        6.1.12 Simple terminals
   6.2 Naming and addressing
   6.3 Security
   6.4 Quality of service (QoS)
   6.5 Mobility
7 Standards for multimedia communication over an IP
   network
   7.1 Overview
   7.2 The ITU-T H.323 family of recommendations
        7.2.1 Functional architecture
        7.2.2 Naming and addressing
        7.2.3 Supplementary services
        7.2.4 Security
        7.2.5 Quality of service
        7.2.6 Mobility
   7.3 Other ITU-T standards
        7.3.1 H.248
        7.3.2 BICC
   7.4 IETF specifications for IP telephony
        7.4.1 Functional architecture
        7.4.2 Main protocols
        7.4.3 Naming and addressing
        7.4.4 Supplementary services
        7.4.5 Security
        7.4.6 Quality of service
        7.4.7 Mobility
   7.5 ETSI TIPHON specifications
   7.6 Terminal specifications from TIA TR-41.3.4
8 Interworking of PISNs and IP networks via a gateway
   8.1 Architecture
   8.2 Signalling
   8.3 Naming and addressing
        8.3.1 Naming and addressing in PISNs
        8.3.2 Naming and addressing in IP networks
        8.3.3 Naming and addressing interworking when
               H.323 used in the IP network
        8.3.4 Naming and addressing interworking when
               SIP used in the IP network
   8.4 Supplementary services
        8.4.1 H.323 supplementary services
        8.4.2 SIP supplementary services
   8.5 Security
   8.6 Quality of service
   8.7 Mobility
   8.8 Network management
   8.9 Aspects requiring further study or standardization
        work
9 Interconnection of remote PISNs via an IP network
   9.1 Classification of scenarios for the interconnection
        of PISNs
   9.2 Solutions for the interconnection of remote PISNs
        via an IP network
   9.3 Solution 1 - QSIG tunnelling over IP network
        transport layer protocol
        9.3.1 Architecture
        9.3.2 Aspects requiring further study or
               standardization work
   9.4 Solution 2 - QSIG tunnelling over IP network
        session control protocol
        9.4.1 Architecture
        9.4.2 Aspects requiring further study or
               standardization work
   9.5 Solution 3 - enhanced QSIG in the IP network
        9.5.1 Architecture
        9.5.2 Aspects requiring further study or
               standardization work
10 Connection of telephones to a PINX via an IP network
   10.1 Architecture
   10.2 Aspect requiring standardization work
11 Summary
Annex A - Overview and status of H.323
Annex B - Overview and status of SIP
Annex C - Overview of H.248/MEGACO protocol
Annex D - Architecture for Signalling Transport over
          IP-networks (SIGTRAN)

Defines the interoperability of Private Integrated Services Networks (PISNs) and Internet Protocol (IP) networks, with a view to identify possible scenarios for interoperation, problems that need to be solved if particular scenarios are pursued further, and possible future standardization activities in this area, particularly; the connection of PISN components via IP networks; the interworking of PISNs and IP networks via a gateway.