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Codec ID Setting ................................................................................................................................ 38
DTMF Setting .................................................................................................................................... 39
RPort Settings..................................................................................................................................... 39
Other Settings..................................................................................................................................... 40
STUN settings .................................................................................................................................... 40
Auto Configuration............................................................................................................................. 41
Encrypt Config ................................................................................................................................... 42
PTT Settings....................................................................................................................................... 42
Cancel without to tag.......................................................................................................................... 43
MAC CIone Setting............................................................................................................................ 43
Tone Settings ...................................................................................................................................... 45
Advanced Settings.............................................................................................................................. 45
System Authority................................................................................................................................ 46
Save & Reboot ................................................................................................................................... 46
Firmware Upgrade.............................................................................................................................. 47
Auto Upgrade ..................................................................................................................................... 47
Reset to Default.................................................................................................................................. 49
Reboot without saving........................................................................................................................ 49
Appendix A Voice Communication Samples......................................................................................... 51
Case 1: ATA to ATA connection via IP address .................................................................................. 51
Case 2: (Peer-to-Peer mode) VIP-157S Port 1 to Port 2 communications ......................................... 52
Case 3: Voice communication via SIP proxy server – SIP-50 ............................................................ 53
Case 4: Voice communication via IP PBX system – IPX-2000 (Auto-config)................................... 55
Case 5: Call Forward Feature_Example 1.......................................................................................... 59
Case 6: Call Forward Feature_Example 2.......................................................................................... 61
Case 7: Call Forward Feature_Example 3.......................................................................................... 63
Case 8: Call Forward Feature_Example 4.......................................................................................... 65
Case 9: Auto Answer Feature_IP to PSTN ......................................................................................... 66
Case 10: Auto Answer Feature_PSTN to IP....................................................................................... 68
Appendix B The method of operation guide............................................................................................ 70
Call Transfer....................................................................................................................................... 70
3-Way Conference.............................................................................................................................. 70
Call Waiting........................................................................................................................................ 70
Switch the Realm (Registration Proxy Server)................................................................................... 70
Auto Update firmware by manual (Keypad) ...................................................................................... 71
Appendix C VIP-156/VIP-156PE/VIP-157/VIP-157S Specifications..................................................... 72
