Siemens Aktiengesellschaft

Siemens Enterprise Communications Gmbh & Co. Kg

Unify Gmbh Co. Kg

Ringcentral, Inc.

Siemens Business Communication Systems, Inc.

Ernst Horvath

Karl Klaghofer

Bruno Bozionek

Klaus Wille

Markku Korpi

Neal J King

Rainer Zimmermann

Thomas Stach

Wilhelm Mueller

Johannes Winter

Meinrad Zingerle

Gerd-Dieter Spahl

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 communication connection can be controlled and/or by use of a function address in the form of a protocol element. The protocol element can be configured to serve as the target address for a message to a server to call up a function.

Method for telecommunication and communication terminal

The invention concerns a telecommunication method, wherein a communication connection, initiated and controlled by the Session Initiation Protocol (SIP) provided by an SIP server (), is established to and/or from a communication terminal (), as well as a communication terminal () configured for that purpose. According to the invention, a function address in the form of an SIP protocol element, which is or may be initiated by the communication terminal (), is generated dynamically for calling up at least one function of the SIP server () that can be assigned to the respective communication connection and is at least temporarily available, wherein the SIP protocol element serves as the target address for an SIP message to the SIP server () to call up the function.

The invention relates to a method and to a device for the bidirectional address conversion in SIP-controlled data streams between IPv4 data devices (T) and IPv6 data terminals (T) in mixed IPv4 and IPv6 data networks using an address converter (AU) and an address converter (AU) integrated in a SIP server (Sor S).

Method and device for the bidirectional address conversion in SIP-controlled data streams between IPv4 and IPv6 data terminals

The invention relates to a method for managing communication connections in a communication system, comprising the following steps: generation of a connection request with a source network address internally valid in the communication system, over at least one network address translating network node to a network element outside the communication system, acceptance of a connection confirmation with a valid network address of a network element outside the communication system, providing the source network address internally valid in the communication system an the network address valid outside the communication system to a connection entry provided on the network element outside the communication system.

Method for managing communication connections by network address translating (NAT) network nodes

A method of controlling provision of audio communication on a network comprising at least two endpoints (), at least one acting as a source and at least one acting as a destination, comprises setting a desired maximum and minimum packet size at the source; setting a desired maximum and minimum packet size at the destination; determining a minimum send packet size as the greater of the desired minimum set by the source and the desired minimum set by the destination; setting a jitter buffer at the destination to an appropriate size for the determined minimum send packet size; and transmitting audio packets of a size greater than or equal to the determined minimum send packet size.

Method of controlling audio communication on a network

There is described a system for switching from an established media path to a new media path for packets transmitted between first and second end points in a packet based network. An instruction is transmitted to the first end point instructing it to set up a new receiving channel for receiving packets transmitted from the second end point over the new media path. An instruction is transmitted to the second end point instructing it to configure a sending channel to send packets over the new media path for reception on the new receiving channel of the first end point. For a time period during the switching, the first end point monitors for packets simultaneously on both its new receiving channel and an established receiving channel configured to receive packets transmitted from the second end point over the established media path. This systems helps ensure a seamless switchover from the established to the new media paths.

System for switching from an established media path to a new media path in a packet based network

Disclosed is a method for controlling a connection, according to which a signaling control device of the communication network triggers a first of several terminal points of the communication, which are connected via a user data channel, to close the user data channel by transmitting a first signaling message. The signaling control device also transmits a confirmation request message to a second of the terminal points of the communication, thereby triggering said second terminal point to transmit a confirmation message to the signaling control device if the user data channel has been successfully closed. If the signaling control device receives the confirmation message, the signaling control device triggers a terminal point of the communication to open at least one new user data channel by transmitting a second signaling message.

Method for controlling a connection in a packet-oriented communication network and arrangements for implementing said method

In cases when a called participant is not registered on a packet oriented network, a call-back request made by a calling subscriber is transmitted automatically to a substitutional device which is disposed in a network and assigned to the called subscriber. Preferably, the callback request is stored in a separate database. As soon as the called subscriber is registered in the network, the callback request is transmitted to the called subscriber.

Automatic callback method for a packet-oriented network

A method of communicating between a user and a network, the method comprising registering with a first central control unit in a first area; registering with a second central control unit in a second area; wherein the second registration is valid concurrently with the first registration; defining a set of priorities by which each control unit determines route selection for a call; and routing a call via the first or second control unit accordingly.

Method of communicating between a user and a network

A method for operating a wireless telephone system to provide emergency service for a wireless telephone operating in the wireless telephone system. In the present invention, the wireless telephone system receives a request to connect the wireless phone to a predetermined telephone number from the wireless telephone. The telephone system then queries the wireless telephone for a unique identifying number identifying the wireless telephone. The unique identifying number enables the wireless telephone system to connect the wireless telephone to the wireless telephone system. The wireless telephone system maintains a set of direct inward dialing numbers (DIDs) that are used exclusively for emergency calls. Each of the DID allows a caller outside of the wireless telephone system to direct a call to a telephone within the wireless telephone system. The emergency call is assigned one of these DIDs and that DID is linked to the unique identifying number of the telephone placing the emergency call. The wireless telephone is then connected to an emergency operator and the emergency operator is given the assigned DID. The DID enables a call from the emergency operator to the wireless telephone through the wireless telephone system. In one embodiment of the present invention, the DID assigned to the wireless telephone also identifies the antenna closest to the wireless telephone. The assignment between the DID and the unique identifying number is terminated after a predetermined period of time which may be altered by the caller or those servicing the emergency call.

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Vienna, Austria

Ernst Horvath