Reference13r3:Concept Third Party Phones
innovaphone phones use ICE and DTLS for direct media compatibility with WebRTC. This way media can be exchanged directly between the phones and a Browser, which offloads the PBX from media forwarding. Many third party phones do not support ICE or DTLS, for this reason a configuration which includes media relay in the PBX for these phones is recommended. The configuration for third party softphones consists of the following components:
- Media Relay set for the device
- Optionally a TURN Server within the private network
- Port forwarding from the NAT-Router to the internal TURN Server or to the PBX