What is RTP proxy and how to use it
If you have users that travel frequently or work remotely, installing a VigorBX2000 allows them to communicate with their peers in the office easily and economically. Smartphones and personal computers can register with the VigorBX2000 as extensions, and make SIP calls to parties located on the SIP trunk site, or any regular telephone through a PSTN trunk.
One concern, however, is that many mobile service providers and wireless hotspots have network address translation (NAT) mechanisms that assign private IP addresses instead of public ones to clients, which are likely to result in call failures that even Session Traversal Utilities for NAT (STUN） cannot rectify. This issue is addressed by a new feature called RTP proxy that has been added to the VigorBX2000 in firmware version 22.214.171.124. RTP proxy helps RTP traffic to traverse NAT by forwarding RTP packets between callers and callees.
To enable RTP proxy, go to IP PBX >> PBX System in the WebUI, and select the "Enable RTP Proxy" checkbox.