NetComm SmartVoice Gateway - Manual (Page 13)

SmartVoice Gateway(s) User Guide 13
YML832 Rev1
Gateway behind a NAT/Firewall Network
The VoIP gateway uses a private IP address and the Internet sharing function of other systems to connect
to the Internet.
The following diagram shows a typical network connection in which broadband devices such as an
ADSL router work in router (NAT) mode so that the gateway is behind a NAT/Firewall. In this case, the
broadband router (NAT/Firewall) and the gateway need to be configured correctly in order to allow the
gateway to communicate with the Internet and VoIP network properly, using different techniques to
traverse the NAT/Firewall.
Note: The above diagram shows a 4-port SmartVoice gateway for illustration purposes.
An 8, 16 or 32 port SmartVoice gateway could also be used depending upon your
network requirements.