
The table shown below lists possible solutions for different network scenarios.
LAN IP address of Internet sharing  | Please avoid IP address   | |||
  | change the settings of Internet sharing device or change the SmartVoice  | |||
  | gateway LAN Port IP address) | 
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WAN IP of SmartVoice gateway | Set as a static private IP address or DHCP; when the WAN port is set as a  | |||
  | static private IP, assign the LAN IP address of the Internet sharing to as default  | |||
  | gateway IP of SmartVoice gateway; When the WAN IP is set as DHCP, please  | |||
  | make sure you have DHCP server running in network to issue an IP to the  | |||
  | SmartVoice gateway.  | 
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NAT Traversal | NAT Public IP | If the WAN of the IP sharing device has a static public IP  | ||
There are three ways to configure  | 
  | address, then the “NAT IP/Domain” address is set as the  | ||
  | Public IP address of the Internet sharing devices. | |||
a SmartVoice gateway to traversing  | 
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NAT in Internet sharing devices. For  | 
  | If the WAN of the Internet sharing device uses a dynamic  | ||
details, please refer to page 26. | 
  | public IP address and you specify a domain name in “NAT  | ||
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  | IP/Domain” field, which has to comply with the DDNS  | ||
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  | settings. | 
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  | Note: you also need to forward specific ports on the NAT  | ||
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  | router to the WAN port of the SmartVoice gateway.  | ||
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  | Enable STUN client will avoid problems of configuring port  | ||
  | STUN client | forwarding in the Internet sharing device, but some NAT  | ||
  | routers do not support STUN.  | |||
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  | Using UPnP to enable the SmartVoice gateway to pass  | ||
  | UPnP Control  | through NAT of Internet sharing device. This function only  | ||
  | point  | works when the Internet sharing devices support UPnP  | ||
  | and has it enabled.  | 
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DDNS Settings  | The WAN of the Internet sharing device  | (Unnecessary) Disabled  | ||
For details, please refer to page 27  | has a static public IP address.  | 
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for the DDNS Settings  | 
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The WAN of the Internet sharing device  | Enabled: enter the registered  | |||
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  | has a dynamic IP address.  | URL (Uniform Resource Locator)  | ||
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  | and DDNS server info into  | |
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  | corresponding areas.  | |
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14  | SmartVoice Gateway(s) User Guide  | 
  | YML832 Rev2  |