Overview of H.323-SIP Gateway

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Presentation transcript:

Overview of H.323-SIP Gateway Agenda Technology Issues Architecture Message Flow Implementation Future 26-Apr-19 Overview of H.323-SIP Gateway

Protocols Transport Layer IP and lower layers Terminal Control/Devices Q.931 H.245 RAS RTCP RTCP Codecs SIP SDP Codecs RTP RTP TPKT TCP UDP Transport Layer IP and lower layers 26-Apr-19 Overview of H.323-SIP Gateway

Overview of H.323-SIP Gateway Issues User Registration Call Sequence Mapping Session Description Transparent RTP/RTCP . . . 26-Apr-19 Overview of H.323-SIP Gateway

Architecture Signaling Gateway “Application” API API H.323 Library (Q.931, RAS, H.245) SIP Library (SIP, SDP) H.323 Network SIP Network 26-Apr-19 Overview of H.323-SIP Gateway

Overview of H.323-SIP Gateway Message Flow SIP Network H323 Network Setup/Q931 INVITE Gateway Connect/Q931 Capabilities/H245 Capabilities/H245. 200 OK. Open Logical Channel/ H245 Open Logical Channel / H245 ACK RTP/RTCP RTP/RTCP 26-Apr-19 Overview of H.323-SIP Gateway

Overview of H.323-SIP Gateway Message Flow H323 Network SIP Network Setup/Q931 INVITE Connect/Q931 200 OK Gateway Capability Exchange ACK Open Logical Channel Re-INVITE/SIP+SDP Open Logical Channel RTP/RTCP RTP/RTCP 26-Apr-19 Overview of H.323-SIP Gateway

Implementation Issues SDP/H.245 mapping. How to calculate subset of capabilities ? Where to send RTP/RTCP in case of non-FastStart ? How to convert OpenLogicalChannel to SDP ? 26-Apr-19 Overview of H.323-SIP Gateway

Overview of H.323-SIP Gateway Implementation Two way call. Either side can initiate the call Fast Connect as well as non-Fast connect RTP packets directly between the endpoints Codecs supported - on going Multiple calls simultaneously - on going User Registration - on going Call transfer and Multiparty conference - NO 26-Apr-19 Overview of H.323-SIP Gateway

Overview of H.323-SIP Gateway Future SIP/IP H323/IP Gateway Voice Mail PSTN 26-Apr-19 Overview of H.323-SIP Gateway