How do I use the Phone Adapter behind a Firewall?

A firewall is system designed to block unwanted network traffic going in and/or out of your home or office network. Some popular brand routers have firewall options built in. If your network is connecting through a firewall, or a router with firewall capabilities, it may interfere with the Phone Adapters service. If you experience any problems with your FonVantage service, and are connecting through a firewall, be sure the following ports are allowed to and from the phone adapter. Phone Adapters Internet ports: SIP ports 5060 through 5061 using UDP protocol NTP port 123 using UDP protocol TFTP port 69 using UDP protocol DNS port 53 using UDP protocol RTP ports 10,000 through 20,000 using UDP protocol Since each firewall may be designed differently, please consult firewall owners manual for further information.