Reference 13r2:Concept RTPTP (myApps VPN)

RTPTP is the protocol used for myApps VPN. On the innovaphone devices there are RTPTP interfaces for IP4 and IP6 available as tunnel endpoints.

The RTPTP protocol uses Voip Calls to establish an IP tunnel between the endpoints of the call. As media, transparent data (clearmode) is used. The IP pakets are sent as the RTP payload. This way the normal ICE and DTLS mechanisms can be used for firewal traversal and security.

There is a client mode and a server mode. The server mode accepts calls from the client. Voip authentication is used to verify the clients. The client establishes the call to the server.

For keep-alive a single byte paket of 0x00 is used, which is sent every second, if no IP packet was sent within the last second. This way the other side can monitor if the network path from the other side is still working. If no paket is received for 10s the either side is clearing the call. The client side should then reestablish the call.

A facility is used to send network information from the server to the client within the Connect message. This facility uses H.450 coding for H.323 calls and JSON coding on the PbxSignal JSON Api of the PBX

There are several endpoints for RTPTP available. Some for client only, some implementing client and server

RTPTP interfaces on innovaphone gateways

Interfaces for IP4 and IP6, supportigng client and server mode are implemented.