Ive connected my adapter or IP Phone behind a Firewall to a network router, but Im having difficulties completing calls. How can I fix the problem?
Recommended Routers Belkin F5D5230-4 Answer: Most routers available in the market place for the small business and homes will work correctly using their “out of the box” configuration. If you have any difficulties or phone service disruptions, please try the following: 1. Download and install the latest firmware for your router. Please visit the router manufacturer’s web site to download the firmware. 2. Complete a factory reset on the router. Review the router’s documentation for the factory reset and be aware that your Internet Provider may have special configuration requirements such as a username and password, which you may need to re-configure after the factory reset is performed. 3. Firewall rules that conflict with the phone / adapter’s Internet ports will cause a disruption in service. Only if you configured specific firewall rules and are familiar with the configuration, please allow the following ports for the phone adapter; otherwise your router does not need extra firewall
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