Our infrastructure is transparent. Our SIP servers are restricted to rooting and user management. This is the key for secured, best quality services!
To achieve secure, best quality calls, you need to use state of the art application. No way you can reach the best without ICE, TURN, SRTP-DTLS, RTCP feedback...
Webrtc was designed with all nice features to achieve best quality and security. A state of art SIP Application will have them all! And you know what: they are 100% compatible!
SIP over TLS with SNI, WEBSOCKET over TLS.
Transparent forwarding, if any. Endpoints should encrypt with DTLS-SRTP.
Service requires no bandwidth. The best comes with no extra cost.
Adapt to congested network with TMMBR/TMMBN.
Adapt to lossy network with NACK, PLI.
Endpoints establish direct connections with ICE, STUN, TURN.