Abstract: A communication connection between a calling communications terminal and a further communications terminal, the connection setup being initiated through the exchange of an invite message and a number of acknowledgment messages between the calling communications terminal, the further communications terminal and a higher-ranking communication-management module, the connection modalities relevant for the calling communications terminal being agreed in a first connection initiation sequence between the higher-ranking communication-management module and an application-management module allocated to the calling communications terminal, and a second connection initiation sequence being provided for agreeing the connection modalities relevant for the further communications terminal between the higher-ranking communication-management module and an application-management module allocated to the further communications terminal.

Abstract: A telecommunications system has a plurality of mutually independent clients each having a plurality of terminal devices connecting to the telecommunication system and provided in groups. A client specific identification KID and a group specific identification ZID are assigned. A dispatcher number storage can serve to assign the KID and ZID from an E.164 incoming call for routing purposes and to determine whether calls will be executed internally or externally.

Abstract: A telecommunication system has a multiplicity of clients each with a multiplicity of subscribers connected by an access device to a long-distance network with a telecommunication apparatus for exchange (PDX). According to the invention between that network and the access device a wireless stretch is formed which can include a satellite link, a UMTS link, a WLAM link or WMAN link.

Abstract: A communication connection between a calling communications terminal and a further communications terminal, the connection setup being initiated through the exchange of an invite message and a number of acknowledgment messages between the calling communications terminal, the further communications terminal and a higher-ranking communication-management module, the connection modalities relevant for the calling communications terminal being agreed in a first connection initiation sequence between the higher-ranking communication-management module and an application-management module allocated to the calling communications terminal, and a second connection initiation sequence being provided for agreeing the connection modalities relevant for the further communications terminal between the higher-ranking communication-management module and an application-management module allocated to the further communications terminal.

Abstract: The invention relates to a method and system control for the setup of an IP telephony connection between an original terminal and a destination terminal in an IP network over a gateway of a branch exchange.

Abstract: A telecommunication system has a multiplicity of clients each with a multiplicity of subscribers connected by an access device to a long-distance network with a telecommunication apparatus for exchange (PDX). According to the invention between that network and the access device a wireless stretch is formed which can include a satellite link, a UMTS link, a WLAM link or WMAN link.

Abstract: A telecommunication group is formed by a multiplicity of private telecommunication facilities configured to connect calls between clients services by those facilities and subscribers of those clients based upon facility identification numbers AID and client identification numbers KID determined by dispatcher numbers from E.164 call numbers.

Abstract: A telecommunications system has a plurality of mutually independent clients each having a plurality of terminal devices connecting to the telecommunication system and provided in groups. A client specific identification KID and a group specific identification ZID are assigned. A dispatcher number storage can serve to assign the KID and ZID from an E.164 incoming call for routing purposes and to determine whether calls will be executed internally or externally.