Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail
Reexamination Certificate
1998-03-25
2001-05-29
Nguyen, Lee (Department: 2683)
Telecommunications
Transmitter and receiver at same station
Radiotelephone equipment detail
C455S426100, C455S507000, C455S517000, C455S561000
Reexamination Certificate
active
06240300
ABSTRACT:
DESCRIPTION
Field of the Invention
The invention relates to a telephony device including a base station connected to the switched network, one or more subscriber units, the telephony device comprising a management assembly formed by a processor assembly, by a memory containing an execution program and by a random-access memory for containing, inter alia, program elements to be executed with respect to the management of the links between the switched network, the base station, and at least one of the subscriber units and at least one of the connection elements. The invention likewise relates to a method implemented in such a telephony device, for connecting to such a telephony device.
Background of the Invention
The invention finds interesting applications in telecommunication systems implying protocols, which is notably the case with telephony devices satisfying the DECT standard, for example.
In telephony devices of this type, the maintenance problems of the programs that direct the operation of such devices become ever more critical because of the fact that they are to be able to adjust themselves to various requirements. Thus, for example these problems occur when from a telephony device that has already been arranged for ensuring the connection between the subscriber unit and the network, one wishes also to ensure a link with a new connection element, for example, a telephone answering machine.
This type of problem is also found back in systems of the GSM type, or those which connect to the ISDN lines.
SUMMARY OF THE INVENTION
The present invention proposes a telephony device of the type defined in the opening paragraph which permits of facilitating the maintenance of this device so that it may adapt itself to links with new connection elements without having to modify too profoundly all the programs directing the operation.
Therefore, such a telephony device is characterized in that each of the links is ensured by half-calls assigned to the calling circuit and called circuit and by links between these half-calls.
The idea of the invention consists of defining with these half-calls the elements that are connected. By analyzing these half-calls, it is thus simple to know what is suitable for these elements, which signal it is to send, etc.
REFERENCES:
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patent: 5794152 (1998-08-01), Hikuma et al.
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patent: 5983100 (1999-11-01), Johansson et al.
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European Telecommunication Standard, Working Draft PR ETS 300 175-5, Jan. 1995, Second Edition, Radio Equipment and Systems (RES); Digital European Cordless Telecommunications (DECT) Common Interface Part 5: Network Layer.
Frank Owen, “The Complete Solution For Cordless Access”, Philips Telecommunications Review, vol. 52, No. 3, pp. 19-22.
Nguyen Lee
Nguyen Simon
Slobod Jack D.
U.S. Philips Corporation
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