Telefonaktiebolaget Lm Ericsson (Publ)

Hans Peter Lippelt

Lars-G&ouml;ran Petersen

Ulf Erik Ekstedt

Patrik Wiss

Gunnar Larsson

Ola Dagberg

A gateway (MG ) interconnects telecom networks (N ,N ) of different types with different signal formats (ATM,IP). A first control unit (CC ), connected (C ) to a server, controls connection set up. A second control unit (RC ) provides telecom functions (F -F ), such as speech coder/decoder or echo extinguisher, to the connection. A third control unit (BC ) establishes connections and sets up switch functions (CP -CP ) corresponding to the different signal formats (ATM,IP). A signal format converter (CP ) converts to/from a common signal format (COM ) that the telecom functions uses. A speech request goes via the server to the first control unit (CC ), which requests telecom function (F ) by the second control unit (RC ). This returns the address (ADR ) of the telecom function to the first control unit (CC ) which sends the function address (ADR ) and the network address (ADR ) of the connection to the third control unit (BC ). This interconnects the corresponding switch function (CP ) and the telecom function (F ) after conversion to the common signal format (COM ) in the signal format converter (CP ). The first control unit (CC ) thereafter requests connection to the next node from the third control unit (BC ), which establishes and indicates the connection (C ) to the first control unit (CC ). This requests setting up of a corresponding switch function (CP ) by the third control unit (BC ), which connects together the switch function with the telecom function (F ) after reconversion of the signal format. The functions (F -F ;CP -CP ) are hardware or software. They can easily be supplemented for new network types or new telecom services.

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Munich, Georgia

Hans Peter Lippelt