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What is RTMFP

Real Time Media Flow Protocol enables direct end user to end user peering communication between multiple Adobe Flash Players and applications built on the Adobe AIR framework. RTMFP enables end‐users to connect and communicate directly with each other using their computer’s microphone and webcam. RTMFP is a peer-to-peer system designed for direct end user to end user communication and file sharing. RTMFP will reduce the bandwidth costs for direct, live, real‐time communication solutions, such as audio and video chat and multi‐player games. Because RTMFP flows data between the end‐user clients and not the server, bandwidth is not being used at the server so solutions are less expensive to scale.

What is SIP

SIP is the abbreviation for Session Initiation Protocol. SIP is an application-layer control protocol that can establish, modify, and terminate multimedia sessions such as Internet telephony calls. SIP can also invite participants to already existing sessions, such as multicast conferences. Media can be added to and removed from an existing session.

SIP supports five facets of establishing and terminating multimedia communications:

User location: determination of the end system to be used for communication;
User availability: determination of the willingness of the called party to engage in communications;
User capabilities: determination of the media and media parameters to be used;
Session setup: "ringing", establishment of session parameters at both called and calling party;
Session management: including transfer and termination of sessions, modifying session parameters, and invoking services.

What is a Gateway

A gateway interconnects networks with different network protocol technologies by preforming the required protocol conversion. It allows communication between the webphone using the RTMP and the SIP phone. A gateway is a network point that acts as an entrance to another network. In enterprises, the gateway is the computer that routes the traffic from a workstation to the outside network that is serving the Web pages. In homes, the gateway is the Internet Service Providers that connects the user to the internet. In enterprises, the gateway node often acts as a proxy server and a firewall. The gateway is also associated with both a router, which use headers and forwarding tables to determine where packets are sent, and a switch, which provides the actual path for the packet in and out of the gateway.

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RTMFP enables real time communication applications such as social networks and multi-user games to deliver high quality solutions. RTMFP enables end users to connect and communicate directly with each other using their computer's microphone and webcam so there is no need for a server. RTMFP is based on the User Datagram Protocol (UDP). UDP-based protocols have many advantages over TCP-based protocols when delivering live streaming media, including decreased latency and overhead as well as greater tolerance for missing packets.

Here is how it works:
The call gets to Ozeki Webphone Gateway through RTMFP, then the Ozeki Phone System XE plays the role of the gateway by converting the media datas so that any kind of SIP phone connected to the Ozeki Webphone Gateway can answer the call. The webphone communicates with the Ozeki Webphone Gateway through the JavaScript API of the Ozeki Webphone Gateway.

Make peer-to-peer calls based on RTMFP with OZEKI Webphone Gateway learn more >>