System and method for number presentation

Telephonic communications – Telephone line or system combined with diverse electrical... – Having transmission of a digital message signal over a...

Reexamination Certificate

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Details

C379S142030, C379S088210

Reexamination Certificate

active

06215861

ABSTRACT:

TECHNICAL FIELD
The present invention relates to an electronic system to collect information in a number of fixed telecommunication lines for presentation of a caller's telephone number and more exactly a system and a method to, from a multiplicity of lines, collect information of calling numbers for presentation, for instance, at a switchboard.
BACKGROUND OF THE INVENTION
Today there is available a number of known devices for presentation of a caller's telephone number via CTI system signalling (Computer Telephony Integration), e.g, via DTMF (Dual-Tone Multiple Frequency), V.23 or the like to an individual subscriber connection. Private persons today have the possibility to store the latest received calls including time information together with phone numbers obtained from the number presentation for a caller, even if only in a limited extent. Thus, it is possible to later call a person who did call earlier, as the phone number of the person will be known by means of the number presentation for the caller. However there is no possibility for a company to utilize such on the market available caller number presentation devices as available devices only can read one line. Consequently, a totally different system to collect the caller's phone number for presentation of all the lines is needed for a company to be able to bring such information together from several phone lines.
Existing presentation of caller's number in Sweden include calls from private persons, calls from mobile phones within the NMT systems NMT-450 and NMT-900 and from mobile phones of the GSM distributors Telia and Europolitan. The presentation of a caller's phone number does not include restricted phone numbers, i.e. subscribers having a secret phone number, and also still no calls from the GSM distributor ComViq, but the phone numbers of this distributor will most probably in a short time be available. A subscriber's phone number concerning an international call is however not yet presented, but the Swedish telephone distributor Telia do have plans to introduce presentation of caller's number also for calls from abroad.
Presentation of caller's number from technical reasons does not include telephone subscriptions not connected to a suitable exchange system, but these systems are continuously expanded and today there are few subscribers who are not connected to such a type of exchange not offering this facility.
There is therefore a demand for a system which will present numbers from a multiplicity of lines simultaneously, whereby, for instance, a company then should be able, e.g. to make statistics over received calls and divide the incoming calls to the company such that a certain client always basically can get the same contact person guided by the subscriber number of the call. Such a system should also preferably store a subscriber number calling the company after closing hours, when nobody is available at the company and can answer the telephone.
SHORT DESCRIPTION OF THE INVENTION
A primary objective according to the present invention is to offer, for instance, companies having a multiplicity of incoming telephone lines, a number of advantages and possibilities which hereby may be obtained by utilizing the phone distributor's supply of a number presentation service.
A second objective is to also facilitate the work for an exchange operator, who no longer will have to personally respond to all incoming calls but may directly forward those to a suitable connection.
According to a first object of the present invention an external system for collection and presentation of subscriber number information of a calling subscriber transferred by CTI system signalling over a stationary network is disclosed, the system for each separate telephone line comprises a line processor with a memory for buffering, which additionally over a bus line is connected to a central processor or a main processor for collection of incoming number information of each line, a unit for conversion of incoming information signalling at each line processor to binary code constituting number information, each line processor further including a number of subfunctions for handling and transfer of received number information, and each line processor having a unique identity which is transferred to the central processor together with the number information for presentation.
According to a second object of the present invention a method for number presentation is disclosed for a multiplicity of incoming telephone lines utilizing subscriber number information for calling subscribers transferred by CTI system signalling over a stationary network, the method comprising the steps of connecting each incoming line to a line processor over a CTI converter for reception of transferred subscriber number information, conversion in the line processor of the information signals, by means of a subfunction, into a binary code for buffering in a memory, and transfer of the binary code and an unique address of the line processor, by means of a second subfunction, over a common bus to a central processor or a main processor having a main function of collecting and handling incoming number information.


REFERENCES:
patent: 4754475 (1988-06-01), Pintos et al.
patent: 4873719 (1989-10-01), Reese
patent: 5282243 (1994-01-01), Dabbaghi et al.
patent: 5349638 (1994-09-01), Pitroda et al.
patent: 5655015 (1997-08-01), Walsh et al.
patent: 5699419 (1997-12-01), Ardon
patent: 5862203 (1999-01-01), Wuikan et al.

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