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Codec ID Setting ................................................................................................................................37
DTMF Setting ....................................................................................................................................38
RPort Settings.....................................................................................................................................38
Other Settings.....................................................................................................................................39
STUN settings ....................................................................................................................................39
Auto Configuration.............................................................................................................................40
PTT Settings.......................................................................................................................................40
Cancel without to tag..........................................................................................................................41
MAC CIone Setting............................................................................................................................41
Tone Settings......................................................................................................................................43
Advanced Settings..............................................................................................................................43
System Authority................................................................................................................................44
Save & Reboot ...................................................................................................................................45
Firmware Upgrade..............................................................................................................................45
Auto Upgrade.....................................................................................................................................46
Reset to Default..................................................................................................................................47
Reboot without saving........................................................................................................................47
Appendix A Voice Communication Samples.........................................................................................49
Case 1: ATA to ATA connection via IP address ..................................................................................49
Case 2: (Peer-to-Peer mode) VIP-157S Port 1 to Port 2 communications .........................................50
Case 3: Voice communication via SIP proxy server – SIP-50............................................................51
Case 4: Voice communication via IP PBX system – IPX-2000 (Auto-config)...................................53
Case 5: Call Forward Feature_Example 1..........................................................................................57
Case 6: Call Forward Feature_Example 2..........................................................................................59
Case 7: Call Forward Feature_Example 3..........................................................................................61
Case 8: Call Forward Feature_Example 4..........................................................................................63
Case 9: Auto Answer Feature_IP to PSTN.........................................................................................64
Case 10: Auto Answer Feature_PSTN to IP.......................................................................................66
Appendix B The method of operation guide............................................................................................68
Call Transfer.......................................................................................................................................68
3-Way Conference..............................................................................................................................68
Call Waiting........................................................................................................................................68
Switch the Realm (Registration Proxy Server)...................................................................................68
Auto Update firmware by manual (Keypad) ......................................................................................69
Appendix C VIP-156/VIP-156PE/VIP-157/VIP-157S Specifications.....................................................70