DE2833519A1 - Telephone call-charge display system - has knobs to set tariff rates and calculates charge from tariff rates and call duration - Google Patents

Abstract

The call-charge display system has an evaluation circuit receiving the call metering pulses sent to the telephone set from the exchange. The evaluation circuit calculates the cost of the telephone call from the tariff rate and the call's duration. The calculated cost is displayed. The tariff rates can be entered in the evaluation circuit using controls knobs. The system does not require direct wiring to the telephone set. The evaluation circuit reconstructs the dialled telephone number from the noise pulse generated during dialling.

Description

Call charge indicator for telephone calls

Charge indicators for telephone calls are known.

They are usually permanently connected to the telephone system, e.g. pay phone, or have to be operated manually as a separate clockwork counter and fed with data in each case and are constantly adjusted. This makes such facilities for domestic use too expensive, too complex or user-dependent and therefore not suitable, reliable to have a cost-saving effect on the phone caller.

The following invention does not have these disadvantages and offers more also has the advantage of being attached to any telephone set without internal intervention will.

A construction example is shown in FIG. 1.

An adapter (2) is attached to the telephone set (1) on the outside connected to the evaluation electronics (13) of the charge indicator (3) via a cable (4) is. The evaluation electronics (13) of the charge indicator (3) have to supply power a mains power connection (5) or is powered by a battery.

The ones sent over the telephone network by the post office, for the human Ear inaudible impulses correspond to the respective speaking time for a fee unit in seconds. You can access the telephone set via the telephone connection cable (12) (1). When a telephone call is made, they are transmitted via the adapter (2) and the cable (4) is forwarded to the evaluation electronics (13) of the fee display (3).

The evaluation electronics (13) has the task of the price due to the Calculate the duration of the telephone call and the cost of the postage fee unit.

The evaluation electronics (13) can e.g. consist of a pulse amplifier, Storage magnets, buffer switches or microprocessors or otherwise designed be. The result of the evaluation, the price of the phone call, is shown on the Display (8) shown visibly. A - With the adjusting buttons (14a, 14b and 14c) the costs for the unit of charge of the post office can be entered or in the case changed after the change.

Another construction example is shown in FIG.

If the numeric display (6) on the Telephone set (1) operated, then arise differently according to the selected digit long sound pulses. These noise impulses are transmitted via the adapter (2) and the Cable (4) forwarded to the evaluator (7) of the charge indicator (3) for evaluation.

The selected preselection number is derived from the length of the noise impulses determined in the evaluator (7) of the fee indicator (3) and stored with the respective Talking time for a charge unit in seconds, the duration of the telephone call and the cost of the charge unit calculated at the price of the telephone call. This is shown visibly on the display (8). The evaluator (7) can, for example, be a microprocessor be.

kit Using the setting button (9), the respective sum of the Calling up telephone costs and reading them on the display (8) of the charge meter (3) will.

With the adjusting knob (10) the respective Talking time for a charge unit in seconds according to the directory of Area codes can be saved or changed in the event of a change.

With the setting button (11) the costs for the fee unit entered for the evaluator (7) or changed in the event of a change.

Claims (7)

Claims 1. Charge indicators for telephone calls, d a d u notices that those sent by the post office are for the human Ear inaudible impulses for the respective speaking time for a fee unit in Seconds from an evaluation electronics (13) detected and from this on the basis of the duration the calls and costs for the charge new at the price of the telephone call calculated and visibly displayed. 2. Charge indicator according to claim 1, d a d u r c h g ek e n n z e i c h n e t that the costs for the charge unit on the setting buttons (14a, 14D and 14c) can be entered. 3. Fee indicator according to claim 1 to 2, d a d u r c h g e k e n It is noted that the connection of the charge indicator does not interfere with the wiring on the telephone set. 4. Fee indicator according to claim 1 'to 3, d a d u r c h g e k e nn z e i c h n e t that the price of the phone call corresponds to the length of the telephone call appears on the display (8) of the charge indicator (3). 5. Fee display according to claim 1 to 4, d a d u r c h g e k e n It is not indicated that the total of all telephone calls made with the operation of the Adjustment button (9) can be called up and the price of the telephone calls on the Display (8) of the charge indicator (3) appears. 6. Indicator of charges for telephone calls, which is also shown Note that the results of dialing any phone number are different long noise impulses for Xeconstruction of the dialed telephone number from the evaluator (7) can be evaluated. 7. Fee indicator according to claim 6, d a d u r c h g ek e n n z e i c h n e t that the respective speaking time for a charge unit in seconds is stored in accordance with the directory of the area codes in the evaluator (7) and from this with the duration of the telephone call at the respective price of the telephone call calculated and visibly displayed.