User's Manual 12 Document #: LTRT-27055
Mediant 1000B Gateway & E-SBC
28.13.2.2 Collecting Digits Mode........................................................................... 635
28.13.2.3 FXO Supplementary Services ............................................................... 635
28.13.3 Call Termination on FXO Devices .........................................................................636
28.13.3.1 Calls Termination by PBX ..................................................................... 636
28.13.3.2 Call Termination before Call Establishment .......................................... 637
28.13.3.3 Ring Detection Timeout ......................................................................... 637
28.14 Remote PBX Extension between FXO and FXS Devices .................................... 637
28.14.1 Dialing from Remote Extension (Phone at FXS) ...................................................638
28.14.2 Dialing from PBX Line or PSTN .............................................................................639
28.14.3 Message Waiting Indication for Remote Extensions .............................................639
28.14.4 Call Waiting for Remote Extensions ......................................................................639
28.14.5 FXS Gateway Configuration ..................................................................................640
28.14.6 FXO Gateway Configuration ..................................................................................641
Session Border Controller Application................................................................643
29 SBC Overview .................................................................................................. 645
29.1 Feature List .......................................................................................................... 645
29.2 B2BUA and Stateful Proxy Operating Modes ...................................................... 646
29.3 Call Processing of SIP Dialog Requests .............................................................. 649
29.4 User Registration ................................................................................................. 651
29.4.1 Initial Registration Request Processing .................................................................651
29.4.2 Classification and Routing of Registered Users ....................................................652
29.4.3 General Registration Request Processing ............................................................653
29.4.4 Registration Refreshes ..........................................................................................653
29.4.5 Registration Restriction Control .............................................................................654
29.4.6 Deleting Registered Users .....................................................................................654
29.5 Media Handling .................................................................................................... 654
29.5.1 Media Anchoring ....................................................................................................655
29.5.2 Direct Media ...........................................................................................................656
29.5.3 Restricting Audio Coders .......................................................................................658
29.5.4 Coder Transcoding ................................................................................................659
29.5.5 Transcoding Mode .................................................................................................662
29.5.6 Prioritizing Coder List in SDP Offer .......................................................................663
29.5.7 SRTP-RTP and SRTP-SRTP Transcoding ...........................................................663
29.5.8 Multiple RTP Media Streams per Call Session .....................................................664
29.5.9 Interworking Miscellaneous Media Handling .........................................................664
29.5.9.1 Interworking DTMF Methods ................................................................. 664
29.5.9.2 Interworking RTP Redundancy ............................................................. 664
29.5.9.3 Interworking RTCP Attribute in SDP ..................................................... 665
29.5.9.4 Interworking Crypto Lifetime Field ......................................................... 665
29.6 Fax Negotiation and Transcoding ........................................................................ 665
29.7 Limiting SBC Call Duration ................................................................................... 666
29.8 SBC Authentication .............................................................................................. 666
29.8.1 SIP Authentication Server Functionality ................................................................666
29.8.2 User Authentication based on RADIUS .................................................................667
29.9 Interworking SIP Signaling ................................................................................... 667
29.9.1 Interworking SIP 3xx Redirect Responses ............................................................668
29.9.1.1 Resultant INVITE Traversing Device .................................................... 668
29.9.1.2 Local Handling of SIP 3xx ..................................................................... 669
29.9.2 Interworking SIP Diversion and History-Info Headers ...........................................670
29.9.3 Interworking SIP REFER Messages ......................................................................670
29.9.4 Interworking SIP PRACK Messages .....................................................................671
29.9.5 Interworking SIP Session Timer ............................................................................671
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