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Codec ID Setting ......................................................................................................33
DTMF Settings .........................................................................................................34
RPort Settings...........................................................................................................34
Other Settings ...........................................................................................................35
STUN settings ..........................................................................................................35
Auto Configuration...................................................................................................36
MAC CIone Setting..................................................................................................36
Tone Settings ............................................................................................................38
Advanced Settings....................................................................................................38
System Authority......................................................................................................39
Save & Reboot..........................................................................................................39
Firmware Upgrade....................................................................................................40
Auto Upgrade ...........................................................................................................40
Reset to Default ........................................................................................................42
Reboot without saving..............................................................................................43
Appendix A Voice communications...............................................................................44
Case 1: Voice communication via SIP proxy server _SIP-50...................................44
Case 2: Call Forward Feature_Example 1................................................................45
Case 3: Call Forward Feature_Example 4................................................................46
Appendix B The method of operation guide ................................................................48
Call Transfer .............................................................................................................48
3-Way Conference ....................................................................................................48
Call Waiting..............................................................................................................48
Switch the Realm (Registration Proxy Server) ........................................................49
Appendix C VIP-254T / VIP-254PT Specifications.....................................................50