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Multimedia Access Platforms

Multimedia Access Platforms. Glen Freundlich Avaya, Inc. ggf@avaya.com. IP Telephony Gateways. Gateway. Network A. Network B. Gateway converts between 2 networks: signaling conversion media (bearer) conversion service conversion

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Multimedia Access Platforms

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  1. Multimedia Access Platforms Glen Freundlich Avaya, Inc. ggf@avaya.com

  2. IP Telephony Gateways Gateway Network A Network B • Gateway converts between 2 networks: • signaling conversion • media (bearer) conversion • service conversion • Networks could be same types (firewall, NAT).

  3. IP-ISDN Gateway Signaling conversion Gateway D channel H.323, SIP B channel RTP Bearer conversion Gateway consists of multiple functions which need not co-exist in same physical box.

  4. Gateway Decomposition Gateway Signaling Gateway Media Gateway Controller Media Gateway H.248/Megaco

  5. IETF/ITU Collaboration • Work begun independently in 1998 in IETF, ITU-T SG16, ETSI TIPHON • ETSI TIPHON and MSF became suppliers of requirements • Agreement at management level in March 1999 • IETF Megaco WG and ITU-T SG16 Q14 develop gateway control protocol as a joint project • Megaco to own requirements document • Q14 to own final protocol standard

  6. Gateway Control Protocols NCS/J.162 IPDC TGCP/J.171 MGCP SGCP MDCP H.248/Megaco others

  7. Future Collaboration? • Additions to H.248 for a Version 2 • Package coordination • reduce or eliminate overlap • validate architecture • check for completeness • Interoperability/testing • Interworking (e.g., to H.323, SIP, BICC) • ???

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