Port forwarding may be necessary if you wish to use VoIP phones on a private network (behind NAT). If your phone is using a private IP address using our NAT proxy should prevent any issues, however depending on your router you may still encounter issues such as your phone not ringing, or no audio when you answer a call.
To help you understand why you need to do this in the first place, you should find the following knowledgebase articles useful:
It is actually useful to have a basic understanding of the cause of your problems before attempting to configure port forwarding, as it will help you appreciated what the following configuration is attempting to achieve. Therefore you should find that reading that two help guides above makes the whole process simpler.
There are two main steps to configuring port forwarding on your phone, and we have created two separate help articles to take you through the process.
If you need to configure multiple phones in your private network the configuration is more complex. You should ensure that you understand the steps above, before reading our article on Configuring multiple phones in one private network.