Version 7.0 11 Mediant 3000
User's Manual Contents
Session Border Controller Application................................................................545
28 SBC Overview .................................................................................................. 547
28.1 Feature List ........................................................................................................ 547
28.2 B2BUA and Stateful Proxy Operating Modes...................................................... 549
28.3 Call Processing of SIP Dialog Requests ............................................................. 552
28.4 User Registration ................................................................................................ 554
28.4.1 Initial Registration Request Processing .................................................................554
28.4.2 Classification and Routing of Registered Users ....................................................555
28.4.3 General Registration Request Processing ............................................................556
28.4.4 Registration Refreshes ..........................................................................................556
28.4.5 Registration Restriction Control .............................................................................557
28.4.6 Deleting Registered Users .....................................................................................557
28.5 Media Handling .................................................................................................. 557
28.5.1 Media Anchoring ....................................................................................................558
28.5.2 Direct Media ...........................................................................................................559
28.5.3 Restricting Audio Coders .......................................................................................561
28.5.4 Coder Transcoding ................................................................................................562
28.5.5 Transcoding Mode .................................................................................................565
28.5.6 Prioritizing Coder List in SDP Offer .......................................................................565
28.5.7 SRTP-RTP and SRTP-SRTP Transcoding ...........................................................566
28.5.8 Multiple RTP Media Streams per Call Session .....................................................566
28.5.9 Interworking Miscellaneous Media Handling .........................................................566
28.5.9.1 Interworking DTMF Methods ..................................................................566
28.5.9.2 Interworking RTP Redundancy ..............................................................567
28.5.9.3 Interworking RTCP Attribute in SDP ......................................................567
28.5.9.4 Interworking Crypto Lifetime Field ..........................................................567
28.6 Fax Negotiation and Transcoding ....................................................................... 567
28.7 Limiting SBC Call Duration ................................................................................. 568
28.8 SBC Authentication ............................................................................................ 568
28.8.1 SIP Authentication Server Functionality ................................................................568
28.8.2 User Authentication based on RADIUS .................................................................569
28.9 Interworking SIP Signaling .................................................................................. 570
28.9.1 Interworking SIP 3xx Redirect Responses ............................................................570
28.9.1.1 Resultant INVITE Traversing Device .....................................................570
28.9.1.2 Local Handling of SIP 3xx ......................................................................571
28.9.2 Interworking SIP Diversion and History-Info Headers ...........................................572
28.9.3 Interworking SIP REFER Messages ......................................................................572
28.9.4 Interworking SIP PRACK Messages .....................................................................573
28.9.5 Interworking SIP Session Timer ............................................................................573
28.9.6 Interworking SIP Early Media ................................................................................573
28.9.7 Interworking SIP re-INVITE Messages ..................................................................576
28.9.8 Interworking SIP UPDATE Messages ...................................................................577
28.9.9 Interworking SIP re-INVITE to UPDATE ................................................................577
28.9.10 Interworking Delayed Offer ....................................................................................577
28.9.11 Interworking Call Hold ............................................................................................577
28.9.12 Interworking SIP Via Headers ...............................................................................578
28.9.13 Interworking SIP User-Agent Headers ..................................................................578
28.9.14 Interworking SIP Record-Route Headers ..............................................................578
28.9.15 Interworking SIP To-Header Tags in Multiple SDP Answers ................................579
28.9.16 Interworking In-dialog SIP Contact and Record-Route Headers ...........................579
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