SIP User's Manual
6
Document #: LTRT-12804
Mediant 800 MSBG
8.3.3.2
FXO Device Interworking SIP E911 Calls from Service Provider's IP
Network to PSAP DID Lines ................................................................................. 424
8.3.3.3
Pre-empting Existing Calls for E911 IP-to-Tel Calls ............................. 427
8.3.4
Configuring DTMF Transport Types ......................................................................428
8.3.5
FXS and FXO Capabilities .....................................................................................430
8.3.5.1
FXS/FXO Coefficient Types .................................................................. 430
8.3.5.2
FXO Operating Modes .......................................................................... 430
8.3.5.3
Remote PBX Extension Between FXO and FXS Devices .................... 437
8.3.6
Configuring Alternative Routing (Based on Connectivity and QoS) ......................442
8.3.6.1
Alternative Routing Mechanism ............................................................ 442
8.3.6.2
Determining the Availability of Destination IP Addresses ..................... 442
8.3.6.3
PSTN Fallback ...................................................................................... 442
8.3.7
Fax and Modem Capabilities .................................................................................443
8.3.7.1
Fax/Modem Operating Modes ............................................................... 443
8.3.7.2
Fax/Modem Transport Modes ............................................................... 443
8.3.7.3
V.34 Fax Support .................................................................................. 449
8.3.7.4
V.152 Support ....................................................................................... 452
8.3.8
Working with Supplementary Services ..................................................................453
8.3.8.1
Call Hold and Retrieve .......................................................................... 453
8.3.8.2
BRI Suspend and Resume .................................................................... 455
8.3.8.3
Consultation Feature ............................................................................. 455
8.3.8.4
Call Transfer .......................................................................................... 456
8.3.8.5
Call Forward .......................................................................................... 457
8.3.8.6
Call Waiting ........................................................................................... 460
8.3.8.7
Message Waiting Indication .................................................................. 461
8.3.8.8
Caller ID ................................................................................................ 463
8.3.8.9
Three-Way Conferencing ...................................................................... 465
8.3.8.10
Multilevel Precedence and Preemption ................................................. 467
8.3.9
SIP Call Routing Examples....................................................................................469
8.3.9.1
SIP Call Flow Example .......................................................................... 469
8.3.9.2
SIP Authentication Example .................................................................. 471
8.3.9.3
Establishing a Call between Two Devices ............................................ 474
8.3.9.4
SIP Trunking between Enterprise and ITSPs ....................................... 475
8.3.10
Mapping PSTN Release Cause to SIP Response ................................................478
8.3.11
Querying Device Channel Resources using SIP OPTIONS ..................................479
8.4
SBC Application ................................................................................................... 480
8.4.1
8.4.1.1
NAT Traversal ....................................................................................... 481
8.4.1.2
VoIP Firewall ......................................................................................... 481
8.4.1.3
Topology Hiding .................................................................................... 481
8.4.1.4
SIP Normalization .................................................................................. 482
8.4.1.5
Survivability ........................................................................................... 482
8.4.2
SIP Network Definitions .........................................................................................482
8.4.3
SIP Dialog Initiation Process .................................................................................482
8.4.3.1
Determining Source and Destination URL ............................................ 483
8.4.3.2
Source IP Group Classification ............................................................. 484
8.4.3.3
SBC IP-to-IP Routing ............................................................................ 485
8.4.3.4
IP-to-IP Inbound and Outbound Manipulation ....................................... 486
8.4.3.5
SIP Header Manipulation ...................................................................... 488
8.4.4
User Registration and Internal Database ..............................................................490
8.4.4.1
Initial Registration Request Processing ................................................ 490
8.4.4.2
Internal Database .................................................................................. 491
8.4.4.3
Routing using Internal Database ........................................................... 492
8.4.4.4
Registration Refreshes .......................................................................... 492
8.4.4.5
Registration Restriction Control ............................................................ 492
8.4.5
SBC Media Handling .............................................................................................493
8.4.5.1
Media Anchoring without Transcoding (Transparent) ........................... 494
8.4.5.2
Media Anchoring with Transcoding ....................................................... 495
8.4.5.3
No Media Anchoring .............................................................................. 497
Summary of Contents for Mediant 800 MSBG
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