Netgate 1AFXS, User Manual

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FXS Gateway Overview
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An e.g. such as ADSL network is in the following.
Step 1. The WAN IP Address obtained from ADSL has two kinds of methods.
Step 2. One is fixed IP Address, while user applies for one or more fixed IP
Addresses.
Step 3. Another is dynamic IP Address while user applies for dial-up
connection way. The LAN IP Address of User’s PC can be set as DHCP
client in order to gain a valid one.
Step 4. Another IP Address for Gateway must be set as an fixed one in order
for that IP Sharing device pass forwarding the relevant information from
WAN to LAN. Besides, a valid IP Address meets the IP Sharing device
(LAN site) is the element.
Step 5. VoIP Gateway must enable the IP Sharing function for the
fixed/dynamic WAN IP Address.