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BCP for SIP to ISUP mapping draft-camarillo-sip-isup-bcp-00.txt - PowerPoint PPT Presentation

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BCP for SIP to ISUP mapping draft-camarillo-sip-isup-bcp-00.txt Gonzalo Camarillo / Adam Roach Gonzalo.Camarillo@ericsson.com Adam.Roach@ericsson.com Gonzalo Camarillo / Adam Roach 47th IETF Adelaide March 28th, 2000 SIP WG Advanced

  1. BCP for SIP to ISUP mapping draft-camarillo-sip-isup-bcp-00.txt Gonzalo Camarillo / Adam Roach Gonzalo.Camarillo@ericsson.com Adam.Roach@ericsson.com Gonzalo Camarillo / Adam Roach 47th IETF Adelaide March 28th, 2000 SIP WG Advanced Signalling Research Lab.

  2. Outline • Contents of the draft • Changes from previous version (presented in DC) • Call flow example showing overlap signalling • Open issues Gonzalo Camarillo / Adam Roach 47th IETF Adelaide March 28th, 2000 SIP WG Advanced Signalling Research Lab.

  3. Contents of the draft Requirements •Extensions Required (multipart bodies, reliable responses…) Message flow • Call flow examples • Two state machines Mapping of parameters • SIP response codes to ISUP cause values • ISUP cause values to SIP response codes • Standard parameters in ISUP messages Gonzalo Camarillo / Adam Roach 47th IETF Adelaide March 28th, 2000 SIP WG Advanced Signalling Research Lab.

  4. Changes from previous version • draft-camarillo-mmusic-sip-isup-bcp-00.txt • Draft “SIP PSTN interworking Umbrella Require ” added as “Extensions Required” section • Scope better defined (User Part Available outside) • SIP bridging (ISUP-SIP-ISUP) described in more detail • Overlap signalling (SAMs) • Lots of examples of call flows Gonzalo Camarillo / Adam Roach 47th IETF Adelaide March 28th, 2000 SIP WG Advanced Signalling Research Lab.

  5. Overlap Signalling SI P M G C/ M G PSTN | | <- - - - - - - - - - - I A M - - - - - - - - - - - | 1 | | ==========A udi o==========>| 2| <- - - - - - - - I N V I TE- - - - - - - - - - - | | 3| - - - - - - - - - - - 484- - - - - - - - - - - >| | 4| <- - - - - - - - - - A CK - - - - - - - - - - - - | | | | <- - - - - - - - - - - SA M - - - - - - - - - - - | 5 6| <- - - - - - - - I N V I TE- - - - - - - - - - - | | | - - - - - - - - - - - 100- - - - - - - - - - - >| | | | <- - - - - - - - - - - SA M - - - - - - - - - - - | 7 8| <- - - - - - - - I N V I TE- - - - - - - - - - - | | | - - - - - - - - - - - 100- - - - - - - - - - - >| | | | <- - - - - - - - - - - SA M - - - - - - - - - - - | 9 10| <- - - - - - - - I N V I TE- - - - - - - - - - - | | | - - - - - - - - - - - 100- - - - - - - - - - - >| | | | <- - - - - - - - - - - SA M - - - - - - - - - - - | 11 12| <- - - - - - - - I N V I TE- - - - - - - - - - - | | | - - - - - - - - - - - 100- - - - - - - - - - - >| | Gonzalo Camarillo / Adam Roach 47th IETF Adelaide March 28th, 2000 SIP WG Advanced Signalling Research Lab.

  6. Overlap Signalling SI P M G C/ M G PSTN 13| - - - - - - - - - - - 18x- - - - - - - - - - - >| | | ==========A udi o==========>| | 14| <- - - - - - - - - PRA CK - - - - - - - - - - - | | | | - - - - - - - - - - - - A CM - - - - - - - - - - >| 15 16| - - - - - - - - - - - 484- - - - - - - - - - - >| | 17| <- - - - - - - - - - A CK - - - - - - - - - - - - | | 18| - - - - - - - - - - - 484- - - - - - - - - - - >| | 19| <- - - - - - - - - - A CK - - - - - - - - - - - - | | 20| - - - - - - - - - - - 484- - - - - - - - - - - >| | 21| <- - - - - - - - - - A CK - - - - - - - - - - - - | | 22| - - - - - - - - - - - 200- - - - - - - - - - - >| | 23| - - - - - - - - - - - 18x- - - - - - - - - - - >| | | | - - - - - - - - - - - - CPG - - - - - - - - - - >| 24 25| <- - - - - - - - - PRA CK - - - - - - - - - - - | | 26| - - - - - - - - - - - 200- - - - - - - - - - - >| | 27| - - - - - - - - - - - 200- - - - - - - - - - - >| | | <=========A udi o==========>| | | | - - - - - - - - - - - - A N M - - - - - - - - - - >| 28 | | <=========A udi o==========>| 29| <- - - - - - - - - - A CK - - - - - - - - - - - - | | Gonzalo Camarillo / Adam Roach 47th IETF Adelaide March 28th, 2000 SIP WG Advanced Signalling Research Lab.

  7. Open Issues • New title (A mapping between ISUP and SIP) • Version of ISUP chosen (Q.767, Q.763, ANSI, national flavours…) • Parameters chosen to be mapped (mandatory) • Reception of several 18x with media • Establishment of the media path in PSTN-SIP scenarios. When 200 is sent. ACK arrives later • Interpretation of 1xx until 183 draft gets frozen • How to route overlap signalling in a stateless proxy performing load sharing between several MGCs. Gonzalo Camarillo / Adam Roach 47th IETF Adelaide March 28th, 2000 SIP WG Advanced Signalling Research Lab.

  8. Overlap Signalling Open Issue Egress MGC 1 Ingress MGC IAM (1234) Stateless SIP proxy IAM (1234) INVITE (1234) INVITE (123456) SAM (56) SIP body = IAM Egress MGC 2 IAM (123456) SIP body = SAM Gonzalo Camarillo / Adam Roach 47th IETF Adelaide March 28th, 2000 SIP WG Advanced Signalling Research Lab.

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