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

4. Gateway Decomposition Signaling Gateway Media Gateway Media Gateway Controller 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 IPDC SGCP MGCP MDCP others H.248/Megaco TGCP/J.171 NCS/J.162

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) ???