Yealink SIP-T38G

Table of Contents
xi
Basic and Advanced Parameters ....................................................................................... 224
Audio Features Parameters ................................................................................................. 299
Security Feature Parameters ............................................................................................... 305
Upgrading the Firmware ..................................................................................................... 308
Resource Files ....................................................................................................................... 311
Troubleshooting .................................................................................................................... 316
Configuring DSS Key ............................................................................................................ 317
Appendix D: SIP (Session Initiation Protocol) ............................................................................ 333
RFC and Internet Draft Support .......................................................................................... 333
SIP Request ............................................................................................................................ 334
SIP Header ............................................................................................................................ 335
SIP Responses ....................................................................................................................... 336
SIP Session Description Protocol (SDP) Usage .................................................................. 339
Appendix E: SIP Call Flows ......................................................................................................... 340
Successful Call Setup and Disconnect ............................................................................... 341
Unsuccessful Call Setup—Called User is Busy .................................................................. 343
Unsuccessful Call Setup—Called User Does Not Answer ................................................ 347
Successful Call Setup and Call Hold .................................................................................. 350
Successful Call Setup and Call Waiting ............................................................................. 352
Call Transfer without Consultation ...................................................................................... 357
Call Transfer with Consultation ............................................................................................ 361
Always Call Forward ............................................................................................................ 367
Busy Call Forward ................................................................................................................ 370
No Answer Call Forward ..................................................................................................... 373
Call Conference .................................................................................................................... 376
Appendix F: Sample Configuration File .................................................................................... 381
Index ......................................................................................387