Ringcentral, Inc.

Siemens Aktiengesellschaft

Unify Gmbh Co. Kg

Siemens Enterprise Communications Gmbh & Co. Kg

Thomas Stach

Karl Klaghofer

Jurgen Totzke

Jürgen Totzke

Ernst Horvath

Stephan Kennedy

Johannes Winter

The invention concerns a computer-implemented method for establishing a communication connection suitable for transmitting media streams from a first RTC client to a second RTC client, including generation of requests including media-specific data and/or parameters, as well as adaptation of the request and generation of a response to the adapted request.

Method for transmitting media streams between RTC clients

A telecommunications assembly and a method for traversing an application layer gateway firewall during the establishment of an RTC communication connection between an RTC client and an RTC server using a proprietary RTC signalling protocol, wherein the firewall has no specific knowledge of the proprietary RTC signalling protocol. The RTC client and the RTC server can negotiate during the establishment of the RTC communication connection which of the ports of the firewall are required for the data packets to be exchanged via the RTC communication connection, wherein they use at least one standardised message element as a component of the proprietary RTC signalling protocol, with which information relating to the ports to be used can be found by the firewall.

Telecommunication system and method for traversing an application layer gateway firewall during the establishment of an RTC communication connection between an RTC client and an RTC server

The invention relates to a telecommunications assembly () and a method for traversing an application layer gateway firewall () during the establishment of an RTC communication connection between an RTC client () and an RTC server () using a proprietary RTC signalling protocol, wherein the firewall () has no specific knowledge of the proprietary RTC signalling protocol. The method comprises the following steps: the RTC client () and the RTC server () negotiate during the establishment of the RTC communication connection which of the ports (P, P, P) of the firewall () are required for the data packets to be exchanged via the RTC communication connection, wherein they use at least one standardized message element as a component of the proprietary RTC signalling protocol, with which information relating to the ports to be used can be found; during the establishment of the RTC communication connection the firewall () detects, with the aid of the standardized message element, which of the ports (P, P, P) of the firewall () are considered by the RTC client () and the RTC server () to be necessary for the data packets to be exchanged via the RTC communication connection; and the firewall () opens and closes the required ports (P, P, P) in a dynamic manner according to the result of the negotiation.

A first communication device used for a coding enables a direct connection installation message and a coded message to be transmitted in the direction of a second communication device. The direct connection installation message is a first direct connection address identifying a coding device and a coding message is allocated to a second direct connection installation message identifying the first communication device. If it is determined that the second communication device assists the provided coding, a direct connection between the second and the first communication device is established using the second direct connection address. Otherwise, a direct connection between the second communication device and the coding device is established using the first direct connection address and is routed from there to the first communication device.

Method for user data transmission

In one aspect, a method for establishing communication in a packet-oriented communications network between a calling (EG) and a called terminal is provided. In the method, before a call-accepted signal by the called terminal, triggered by a message within the framework of call set-up signaling, a direct, first payload connection is established and maintained between the calling and the called terminal. As a direct result of the call-accepted signal of the called terminal communication is triggered between the calling and called terminal by means of the established first payload connection.

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Vienna, Austria

Thomas Stach