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1 ATM Pittsburgh 2000 IETF - Rajesh Kumar, 8/2/2000 © 1998, Cisco Systems, Inc. Status of ATM SDP work Work item of Multiparty Multimedia Session Control (mmusic) WG +Last call before next IETF meeting SDP conventions for controlling/describing ATM bearer connections +Preserve standard SDP (rfc2327) syntax +Applications to use subsets ATM applications addressed +SDP descriptions constructed by bearer nodes or call agents +Used with SIP, MGCP, Megaco etc. +Bearer connection types -SVC set-up for new service connection - AAL1, 2 and 5 -Assign existing resources - VCCs (AAL 1, 2 and 5) and CIDs (AAL2) Comments and discussions on mailing list +Several, detailed comments in May - July All comments currently accounted for. Workis substantially complete. +Need further critique, finalization and approval
2 ATM Pittsburgh 2000 IETF - Rajesh Kumar, 8/2/2000 © 1998, Cisco Systems, Inc. Edge SVCCore SVC Edge SVC Edge Switch (ATM/AAL2) Trunk/Edge Media Gateway TDM/ analog ports TDM/ analog ports ATM Edge Network ATM Core Network End-to-end SVC Edge PVC Core PVC Edge PVC Core SVC Edge PVC TDM/Analog Endpoints TDM/Analog Endpoints Optional ATM Endpoints Optional ATM Endpoints SS7 Network/ SIP Q.1901 ISUP SIP MGCP/Megaco/ SIP BEARER OPTIONS Optional Bearer Signaling (Q.2931 and/or Q ) Trunk/Edge Media Gateway Media Gateway Controller Optional (MGCP/ Megaco/SIP) Edge Switch (ATM/AAL2) Q.1901 ISUP SIP Optional (MGCP/ Megaco/SIP) MGCP/Megaco/ SIP General Reference Model
3 ATM Pittsburgh 2000 IETF - Rajesh Kumar, 8/2/2000 © 1998, Cisco Systems, Inc. Summary of Description Capabilities Bearer Network Identification (ATM) ATM address self-identification VC and CID addressing RTP payload type delcaration for AAL1 and AAL5 audio AAL2 profile declaration - standard, custom AAL5 applications include data, video, H.323c and af-vtoa-83 Correlation of service-level connections with ATM bearer connections Mapping of codecs into services ATM parameters +Adaptation type, QoS class, ATM transfer capability / service category, broadband bearer class, traffic descriptor, ABR parameters, CPS parameters and SSCS parameters Special capabilities: +Leaf initiated join, anycast, lawful wiretap, SVC caching
4 ATM Pittsburgh 2000 IETF - Rajesh Kumar, 8/2/2000 © 1998, Cisco Systems, Inc. ATM SDP Examples (1) v=0 o=- A3C47F F0 0 ATM - - s=- c=ATM NSAP e64.fd e64.fd01.00 t=0 0 m=audio $ AAL1/AVP a=atmmap:96 G a=eecid:B3D58E v=0 o=- A3C47F F0 0 ATM - - s=- c=ATM NSAP e64.fd e64.fd01.00 t=0 0 m=audio $ AAL2/ITU 8 AAL2/custom 100 AAL2/ITU 1 a=eecid:B3E32
5 ATM Pittsburgh 2000 IETF - Rajesh Kumar, 8/2/2000 © 1998, Cisco Systems, Inc. ATM SDP Examples (2) v=0 o= ATM - - s=- c=ATM - - t=0 0 m=audio $ - - a=bearertype:SVC on m=data 7/6/$ - - a=aalType:AAL5 a=aal5App:assuredSSCOP m=video 9/3/$ AAL5/AVP ITUMPEG2
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