Siemens Aktiengesellschaft

Josef Wahler

Rainer Windecker

Steffi Winkler

Andreas Steffan

Antonius Emmerink

Egon Klein

Jürgen Totzke

Gunnar Boll

Reinhard Deml

Mike Thoms

Harold Linke

Axel Buerck

Helmut Rackl

Johann-Heinrich Schinke

A method and an arrangement are specified for setting up and clearing communications links via a private branch exchange. A number of types of communications device are driven via the same controller. New devices with a transport network for transporting the communications data can thus be integrated in a private branch exchange by using TDM-based devices. The central configuration of the controller allows already existing central interfaces and databases relating to subscribers to be used. If required, service feature controllers can still be used.

Method and system for setting up and/or clearing a communications link between two types of devices

A method and an arrangement are specified for setting up and clearing communications links via a private branch exchange. The transport network for transporting the communication data is preferably in the form of an ATM network or IP network, and is controlled by a separate control network, separated from it. The advantage is that the two networks are independent of one another, and that broadband communications requirements can be satisfied easily by a modular expansion capability. The central control configuration allows already existing central databases relating to subscribers to be used, and likewise allows connection-related service feature control systems still to be used.

Communications system and method

A switching system is connected to a communication network via a broadband access unit having a network access interface and communication terminals are connected to the communication network via hubs. The broadband access unit has conversion units allocated to the hubs, via which conversion units a bi-directional conversion between the data format of the packet-oriented communication network and a data format within the switching system is effected. Furthermore, the broadband access unit has a switching network module for combining the data to be transmitted from the conversion units to the associated hubs.

Communications system with communication terminals which are connected to a switching system via a packet-oriented communication network

In the context of making a cell-loss-sensitive connection between an originating subscriber device and a destination subscriber device via an ATM coupling field, a connection is set up only if the sum of the connection bandwidths of cell-loss-sensitive connections, executed via a logical point-to-point connection connecting the destination subscriber device with the ATM coupling field and in the process of being made, is less than or equal to a predeterminable limit value. All other connections are set up without checking.

Method for controlling packet-oriented data forwarding via a coupling field

Growing community of inventors

Taufkirchen, Germany

Josef Wahler