Multiplex communications – Pathfinding or routing – Through a circuit switch
Reexamination Certificate
1998-11-16
2001-12-25
Hsu, Alpus H. (Department: 2661)
Multiplex communications
Pathfinding or routing
Through a circuit switch
C709S241000, C712S032000
Reexamination Certificate
active
06333928
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to the field of computers and communication, particularly communication between an enterprise and the outside world, using a plurality of different means and modes of communication, and has for its object a multimedia telecommunication server for an enterprise or an analogous entity.
The present invention relates more particularly to a telecommunication server permitting the interconnection of a plurality of voice and internal computer communication equipments to an enterprise or a work site and their connection, on the one hand, to public networks such as an analog switched telephone network PSTN (Public Switching Telephone Network), a digital switched network for integration of ISDN services (for example French Numeris Network), or a packet switching network for transport of data by packets (for example Transpac X25 or Internet) and, on the other hand, to private networks such as for example those constituted by digital or analog leased lines, networks internal to an enterprise, Local Area Network (LAN) (for example of the Ethernet type) or else networks for the transmission of data by packets (for example of the Intranet type or of the type using the communication protocol X25).
DESCRIPTION OF THE RELATED ART
There already exist different devices ensuring in part or in whole the interconnection of the various equipments indicated above, each of them, however, having one or several drawbacks or one or several limitations.
Thus, it is known to interconnect a computer server and a PBX (Private Branch Exchange) by means of a bidirectional exchange connection controlled by a suitable communication protocol.
However, such a hybrid construction requires recourse to an external computer unit to control and supervise said interconnection of communication paths. This necessarily implies the provision and use of an interconnection protocol between the two systems (for example of the CSTA or SCAI type), which slows executions and increases the workload of the central unit of the computer server.
There are also already known integrated interconnection devices based on a specific material structure in the form of a card or a specific central unit with real time switching and/or based on specific use of additional real time-call processing software.
As a result, the development times to create applications and an embodiment of said development by the sole specialists in the proprietary system, are increased. Moreover, the functions and services that can be provided by specific systems are limited by the capacities of the material (memory, central unit) and of the particular software installed and used, which do not develop as rapidly as the standard software and materials.
SUMMARY OF THE INVENTION
The object of the present invention is to overcome the various aforementioned drawbacks and to provide a multimedia telecommunication server, ensuring simultaneously operations of the computer server type and functions of the PBX type and adapted to carry out the interconnection of at least the different aforementioned equipment and communication supports, whilst having a material and software structure based on standard elements, combined in a new and advantageous manner.
Moreover, another object is to be able to permit the simultaneous execution of several independent applications by said telecommunication server, without substantially decreasing the quality of execution of each of said applications.
To this end, the present invention has for its object a telecommunication server for an enterprise or like entity, characterized in that it is principally constituted, on the one hand, by a central switching assembly comprising a management module with an undedicated microprocessor serving to support a standard multi-tasking computer operating system, supervising in real time the switchings of the multiplexed frames, a module forming a real time switching matrix for digital channels and a transfer module for voice messages, interconnected by at least one link or internal bus for communication and transfer, on the other hand, by modules interfacing with analog and/or digital transmission lines and/or with one or more links or buses of computer networks, internal to the enterprise, and, finally, by modules interfacing with transmission lines connected to the digital and analog public communication networks, said modules being integrated into a single structural assembly.
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Kent Elliott, “Gateways to the Telephone cloud”, pp. 41-42, Telecommunications, Apr. 1997.
Bohn Pierre
Schaal Denis
Hsu Alpus H.
Nguyen Brian
Societe Alsacienne et Lorraine de Telecommunications et d'E
Young & Thompson
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