User Manual
Table Of Contents
- Chapter 1 Introduction
- Chapter 2 Preparations & Installation
- Chapter 3 Network Service Configurations
- Chapter 4 VoIP Telephone Adapter Configurations
- Chapter 5 Netowrk
- Chapter 6 NAT Trans
- Chapter 7 SIP Setting
- Chapter 8 Advance Setting
- Chapter 9 Other Setting
- Appendix A Voice Communication Samples
- Case 1: ATA to ATA connection via IP address
- Case 2: (Peer-to-Peer mode) VIP-157S Port 1 to Port 2 communications
- Case 3: Call Forward Feature_Example 1
- Case 4: Call Forward Feature_Example 2
- Case 5: Call Forward Feature_Example 3
- Case 6: Call Forward Feature_Example 4
- Case 7: Auto Answer Feature_IP to PSTN
- Case 8: Auto Answer Feature_PSTN to IP
- Appendix B The method of operation guide
- Appendix C VIP-156/VIP-156PE/VIP-157/VIP-157S Specifications

7BChapter 6
HNAT Trans
35BStun Settings
This page defines the STUN Enable/Disable and STUN Server IP address in this page. This function
can help your Phone Adapter working properly behind NAT. To change these settings please following
your ISP information. When you finished the setting, please click the Submit button.
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36BPC Settings
This page defines the PC setting in this page.
Field Description
Device Active
The default is Bridge mode, and it also provides NAT mode.
Bridge: When set as is mode, the LAN and PC ports are in the same
network segment.
NAT: The LAN and PC ports are in the different network segment, and
PC port could enable the DHCP Server function to allot the IP
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