1 / 17

H.323 Terminal Profile Overview for Gatekeeper Communication Protocol

This document outlines the H.323 terminal profile, detailing compliance with H.323 Annex F and J, focusing on gatekeeper communication protocols, including RAS for call signaling and capability negotiation. It highlights mandatory voice codecs like G.711, support for multimedia calling (voice, fax, video), and features such as DTMF and multipoint calling. Additionally, it covers security aspects like password-based authentication, media encryption, and user identification through E.164. The recommended methods for gatekeeper discovery and message implementation are also discussed.

ada
Télécharger la présentation

H.323 Terminal Profile Overview for Gatekeeper Communication Protocol

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. iNOW! Terminal Profile Vineet Kumar Intel Corporation vineet.kumar@intel.com

  2. Scope of profile • Terminal <-> Gatekeeper Protocol • H.323 Annex F compliant • H.323 Annex J compliant

  3. H.323 Annex F • Light-weight profile of H.323 • Endpoint - Gatekeeper communication protocol (RAS) • Call Signaling, Capability Negotiation • Call Control (optional), Capability Negotiation • Mandatory voice codec G.711 • DTMF support • Multipoint (n-way calling) using MCU • Multimedia (voice, facsimile, video, etc.)

  4. H.323 Annex F • Multiple virtual lines (simultaneous voice, fax, ...) • Alternate gatekeeper support • Fail-safe gatekeepers (not during call) • Gatekeeper load balancing

  5. Additions in Terminal Profile • Low bit rate codec G.723.1 or G.729A

  6. H.323 Annex J • Profile of H.235 • Password • Message authentication, integrity, encryption • Media encryption • Certificates • Non-repudiation in addition to password based scheme • Encryption algorithm • Des, Triple-Des • Hash algorithm • HMAC-SHA1-96

  7. Security in Terminal Profile • Password based security using HMAC-SHA1 • Two-way user/message authentication • Two-way message integrity • Message not encrypted • Data not encrypted

  8. Identification • User • E.164 ((+1) 503 555-1212) • Email address (503-555-1212 @itspA.com) • Password • recommendation to provide both email and e.164 • one email address for voice, fax, email, etc. • Terminal • for gatekeeper to identify terminal • globally unique signature provided by vendor • terminal identifier provided by gatekeeper

  9. Identification • Gatekeeper • email address (gkID@ itspA.com)

  10. Gatekeeper discovery • Using DNS on user email address • SRV query • Text record query • “A” record query • Pre-configuration with IP address of gatekeeper • Multicast the GRQ message • Not widely used • use administrative scoped addresses Recommendation to implement all five discovery methods

  11. Messages • Shall implement message-fields as defined • RAS • Gk discovery: GRQ/GCF/GRJ • Terminal registration: RRQ/RCF/RRJ • Terminal unregistration: URQ/UCF/URJ • Misc: XRS, NonStandardMessage • Call Signaling • Setup, Call Proceeding, Alerting, Connect, Release Complete, Facility, Status Inquiry/Status, Information

  12. ITSP X ITSP Y BE GK Setup(+1.503.264.9876/joe@y.com) Setup(+1.503.264.9876) BE GK Setup(+1.503.264.9876/joe@y.com) GW Terminal->Phone/Fax Call DU/DU-ACK DU/DU-ACK DU/DU-ACK Internet/IP +1.503.264.9876 joe@y.com

  13. ITSP X ITSP Y BE GK Alerting Alerting BE RTP(G.723.1/G.729)/T.38 GK Alerting GW RTP(G.723.1/G.729)/T.38 Terminal->Phone/Fax Call Internet/IP +1.503.264.9876 joe@y.com

  14. ITSP X ITSP Y BE GK Connect Connect BE GK Connect GW Terminal->Phone/Fax Call Internet/IP RTP(G.723.1/G.729)/T.38 RTP(G.723.1/G.729)/T.38 +1.503.264. 9876 joe@y.com

  15. ITSP X ITSP Y BE GK BE GK GW Terminal->Phone/Fax Call Internet/IP RTP(G.723.1/G.729)/T.38 RTP(G.723.1/G.729)/T.38 +1.503.264. 9876 joe@y.com

  16. ITSP X ITSP Y BE GK Release Complete Release Complete BE RTP(G.723.1/G.729)/T.38 GK PSTN Release Complete RTP(G.723.1/G.729)/T.38 GW Terminal->Phone/Fax Call Internet/IP +1.503.264. 9876 joe@y.com

  17. Thank You!

More Related