Version 5.8 7 October 2009
SIP User's Manual Contents
8.1.1
 Distinctive Ringing................................................................................................. 444
8.2 Prerecorded Tones File ........................................................................................ 446
8.3 Dial Plan File
........................................................................................................ 446
8.4 FXS Coefficient File
.............................................................................................. 448
8.5 User Information File
............................................................................................ 449
9 IP Telephony Capabilities .............................................................................. 451
9.1 Dialing Plan Features ........................................................................................... 451
9.1.1 Dialing Plan Notation for Routing and Manipulation ............................................. 451
9.1.2 Digit Mapping ........................................................................................................ 453
9.1.3 External Dial Plan File ........................................................................................... 454
9.2 SBC Application ................................................................................................... 456
9.2.1 Overview ............................................................................................................... 456
9.2.1.1 NAT Traversal ........................................................................................ 456
9.2.1.2 VoIP Firewall .......................................................................................... 457
9.2.1.3 Topology Hiding ..................................................................................... 457
9.2.1.4 SIP Normalization .................................................................................. 457
9.2.1.5 Survivability ............................................................................................ 458
9.2.2 SIP Network Definitions ........................................................................................ 458
9.2.2.1 Signaling Routing Domain (SRD) Entities ............................................. 458
9.2.2.2 SIP Interfaces ........................................................................................ 459
9.2.2.3 Media Realms ........................................................................................ 460
9.2.3 SIP Dialog Initiation Process ................................................................................. 460
9.2.3.1 Determining Source and Destination URL ............................................ 462
9.2.3.2 Source IP Group Classification .............................................................. 462
9.2.3.3 SBC IP-to-IP Routing ............................................................................. 463
9.2.3.4 IP-to-IP Inbound and Outbound Manipulation ....................................... 465
9.2.4 User Registration and Internal Database .............................................................. 466
9.2.4.1 Initial Registration Request Processing ................................................. 466
9.2.4.2 Internal Database .................................................................................. 467
9.2.4.3 Routing using Internal Database ........................................................... 467
9.2.4.4 Registration Refreshes .......................................................................... 468
9.2.5 SBC Configuration Example ................................................................................. 468
9.2.5.1 Survivability and Alternative Routing ..................................................... 474
9.2.5.2 SIP URI Manipulation ............................................................................ 478
9.3 Stand-Alone Survivability (SAS) Feature ............................................................. 480
9.3.1 Configuring SAS .................................................................................................... 481
9.3.2 Configuring Emergency Calls ............................................................................... 482
9.4 Emergency Phone Number Services ................................................................... 483
9.4.1 Enhanced 911 Support ......................................................................................... 483
9.4.1.1 FXO Device Interworking SIP E911 Calls from Service Provider's IP
Network to PSAP DID Lines ................................................................................. 483

9.4.1.2 FXS Device Emulating PSAP using DID Loop-Start Lines ................... 487
9.5 Configuring DTMF Transport Types ..................................................................... 490
9.6 Fax and Mo
dem Capabilities ................................................................................ 492
9.6.1 Fax/Modem Operating Modes .............................................................................. 492
9.6.2 Fax/Modem Transport Modes ............................................................................... 492
9.6.2.1 T.38 Fax Relay Mode ............................................................................ 493
9.6.2.2 Fax/Modem Bypass Mode ..................................................................... 494
9.6.2.3 Fax / Modem NSE Mode ....................................................................... 495
9.6.2.4 Fax / Modem Transparent Mode ........................................................... 496
9.6.2.5 Fax / Modem Transparent with Events Mode ........................................ 497
9.6.2.6 G.711 Fax / Modem Transport Mode .................................................... 497
9.6.2.7 Fax Fallback .......................................................................................... 498
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