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2. If you selected Dynamic public IP address, enter the Public domain name. Get the public domain
name from your ISP.
A DDNS (Dynamic Domain Name Service) provider such as www.dyndns.com matches your
dynamic IP addresses to your public domain name, so your multi-branch VoIP network or external
IP phones will continue to work when the IP address changes.
If your router supports DDNS, ensure it supports your DDNS provider, and configure it to update
the DNS servers.
If your router does not support DDNS, download one of the applications specified on
www.dyndns.com. To update the DNS servers, the application needs to run on a PC connected to
the same LAN as the phone system.
3. If you selected Static public IP address, enter the Current public IP address from your Internet
Service Provider. Leave the Public domain name box blank.
If the phone system is not behind a router, or if a private virtual network is used, the public IP
address is the local IP address of the unit acting as local proxy.
Note that it will take up to one minute for the new static public IP address to take effect.
4. Record the Current public IP address or the Public domain name.
If you are setting up an external IP extension, you will need the public IP address or public
domain name of the system.
If you are setting up a multi-branch VoIP network, the multi-branch profiles of the SIP clients
must be configured with the public IP address or public domain name of the SIP server.
E V E R Y C A L L C O U N T S
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