If you’ve set up an IP phone that’s able to make calls, but unable to receive calls, it can usually be resolved by enabling the NAT setting on your phone.
In this article, you’ll find information on what can cause issues with receiving calls on IP phones and how to resolve it.
In most cases, issues with receiving calls are caused by your organization’s network router or firewall. By enabling Network Address Translation (NAT) on your phone, Telzio calls can find their way through the router and to your phone.
Most IP phones have a setting to turn on NAT. Start by enabling the NAT setting on your IP phone and see if that resolves the issue. You can locate the NAT setting by checking the user manual or searching our support guides.
Your IP phone may need to know the IP of your network in order to enable NAT. You can find your IP by searching for “my IP” on Google. Type this IP address into the field provided in the phone settings.
If your phone has the ability to use a STUN server, you can use the following STUN server address: