EP0448369A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Control of a card interface for access to an apparatus such as a telephone
Assignee: Nokia Oyj
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Filing: 1991-03-20
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Granted: —
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Expires: 2011-03-20
Abstract
Abstract An arrangement in an apparatus, particularly a telephone, the operation of which is on the basis of a memory card or a smart card inserted into the apparatus, the apparatus including means for checking the identification data of the card and for activating the desired function of the apparatus after the acceptance of the data. The apparatus includes a memory unit in which the checked and accepted identification data are recorded in connection with registration into the system. The apparatus also includes a timer and comparison means which, on the basis of the output signal of the timer, compare the identification data of the card with the identification data recorded in the memory unit, and thus cause the operation to be terminated in the event that the compared identification data are not mutually identical.
Inventors
- 👤 Seppo Alanara
- 👤 Heikki Ojaniemi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 21:44
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/66; H04M1/667; H04M1/67; H04M1/675
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
158 words
Apparatus, for example a telephone, the operation of which takes place on the basis of an authorization given by identification data on a memory card insertable at for this purpose into the apparatus, the apparatus including means for checking the identification data of the card introduced into the apparatus and for activating the desired function of the apparatus after the acceptance of the data, characterized in that the apparatus further includes a memory unit in which, whenever the apparatus is operated using a card, the checked and accepted identification data of the card are recorded, a timer, and comparison means which, on the basis of a signal given by the timer, carries out a comparison of the card identification data and the identification data recorded in the memory unit, and causes the function of the apparatus to be terminated in the event that the result of the comparison is that the compared identification data are not mutually identical.
Claim 2
Dependent Claim
116 words
Apparatus according to Claim 1, characterized in that the said memory unit is a non-erasable memory, in which case the operation recording the identification data of a card is the actual initiation of the apparatus, whereafter the identification data will remain in the apparatus as a constant for comparison; or alternatively the said memory unit is an erasable memory, in which case the operation which records the identification data of a card is any checked and accepted registration made using the card, the identification data recorded for the purpose of identification being erased from the memory unit at the end of the said registration or at the time when the card is removed from the apparatus.
Claim 3
Dependent Claim
47 words
Apparatus according to Claim 1 or 2, characterised in that the timer measures the checking time interval during each use for the time of acceptance onward, and that the checking time interval is a constant predetermined time period or, alternatively a time period varying between predetermined limits.
Claim 4
Dependent Claim
59 words
Apparatus according to Claim 3, characterized in that the comparison time interval provided by the timer is arranged to increase, preferably progressively, as the time which has elapsed from the latest card operation increases, which time is also separately measured by the timer, or alternatively the comparison time interval provided by the timer is arranged to vary at random.
Claim 5
Dependent Claim
45 words
Apparatus according to any of the preceding claims, characterised in that the said comparison means always carries out the said comparison of the identification data, with the consequences, in connection with a card operation of the system, regardless of the signal given by the timer.
Claim 6
Dependent Claim
42 words
Apparatus according to any of the preceding claims, characterised in that the said comparing means disconnects a supply voltage to the card whenever a predetermined time has elapsed from the last card operation, and immediately after each comparison of the identification data.
Claim 7
Dependent Claim
107 words
Apparatus according to Claim 6, characterised in that, when a system or an operator feeds into the apparatus a function order or part of it in any manner, the card-control circuit in the apparatus is arranged to be activated immediately or, alternatively, to wait for the next comparison signal given by the timer and then to be activated and, as continuation to the activation carried out at any given time, to prime the card into the mode which preceded the disconnecting of the voltage, and to prime the said comparison means to carry out the comparison with the identification data and its consequences, before a card operation.
References Cited (Backward Citations)
No citation records indexed.
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