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

5