User's Manual 12 Document #: LTRT-10632
Mediant 800B Gateway & E-SBC
28.13.1 FXO Operations for IP-to-Tel Calls ........................................................................645
28.13.1.1 One-Stage Dialing ................................................................................. 646
28.13.1.2 Two-Stage Dialing ................................................................................. 647
28.13.1.3 DID Wink ............................................................................................... 647
28.13.2 FXO Operations for Tel-to-IP Calls ........................................................................648
28.13.2.1 Automatic Dialing .................................................................................. 648
28.13.2.2 Collecting Digits Mode........................................................................... 649
28.13.2.3 FXO Supplementary Services ............................................................... 649
28.13.3 Call Termination on FXO Devices .........................................................................650
28.13.3.1 Calls Termination by PBX ..................................................................... 650
28.13.3.2 Call Termination before Call Establishment .......................................... 651
28.13.3.3 Ring Detection Timeout ......................................................................... 651
28.14 Remote PBX Extension between FXO and FXS Devices .................................... 651
28.14.1 Dialing from Remote Extension (Phone at FXS) ...................................................652
28.14.2 Dialing from PBX Line or PSTN .............................................................................653
28.14.3 Message Waiting Indication for Remote Extensions .............................................653
28.14.4 Call Waiting for Remote Extensions ......................................................................653
28.14.5 FXS Gateway Configuration ..................................................................................654
28.14.6 FXO Gateway Configuration ..................................................................................655
Session Border Controller Application................................................................657
29 SBC Overview .................................................................................................. 659
29.1 Feature List .......................................................................................................... 659
29.2 B2BUA and Stateful Proxy Operating Modes ...................................................... 660
29.3 Call Processing of SIP Dialog Requests .............................................................. 663
29.4 User Registration ................................................................................................. 665
29.4.1 Initial Registration Request Processing .................................................................665
29.4.2 Classification and Routing of Registered Users ....................................................666
29.4.3 General Registration Request Processing ............................................................667
29.4.4 Registration Refreshes ..........................................................................................667
29.4.5 Registration Restriction Control .............................................................................668
29.4.6 Deleting Registered Users .....................................................................................668
29.5 Media Handling .................................................................................................... 668
29.5.1 Media Anchoring ....................................................................................................669
29.5.2 Direct Media ...........................................................................................................670
29.5.3 Restricting Audio Coders .......................................................................................672
29.5.4 Coder Transcoding ................................................................................................673
29.5.5 Transcoding Mode .................................................................................................676
29.5.6 Prioritizing Coder List in SDP Offer .......................................................................676
29.5.7 SRTP-RTP and SRTP-SRTP Transcoding ...........................................................677
29.5.8 Multiple RTP Media Streams per Call Session .....................................................677
29.5.9 Interworking Miscellaneous Media Handling .........................................................678
29.5.9.1 Interworking DTMF Methods ................................................................. 678
29.5.9.2 Interworking RTP Redundancy ............................................................. 678
29.5.9.3 Interworking RTP-RTCP Multiplexing ................................................... 679
29.5.9.4 Interworking RTCP Attribute in SDP ..................................................... 679
29.5.9.5 Interworking Crypto Lifetime Field ......................................................... 679
29.5.9.6 Interworking Media Security Protocols .................................................. 679
29.5.9.7 Interworking ICE Lite for NAT Traversal ............................................... 679
29.6 Fax Negotiation and Transcoding ........................................................................ 679
29.7 Limiting SBC Call Duration ................................................................................... 680
29.8 SBC Authentication .............................................................................................. 680
29.8.1 SIP Authentication Server Functionality ................................................................680