JPS6395796A - Dial pulse recognizing system - Google Patents

Abstract

PURPOSE:To correctly receive a number by inputting the dial pulse of a prescribed dial number after the connection of a line, learning an impulse speed based on the time length of the dial pulse, referring to this, and thereafter, recognizing the number of the dial pulse inputted. CONSTITUTION:The system has a learning circuit 4 to input the dial pulse of a prescribed dial number which is the output of a dial pulse detecting circuit 2 after the connection of the line, to measure a total time length Ta, to identify the impulse speed and to calculate a deviation to the reference value of the total time length Ta and a recognizing circuit 6 to measure the total time length Ta of the dial pulse, to refer to the learning result stored into a register 5 and to recognize the turned dial number. The dial pulse of the prescribed dial number detected after the connection of the line with the learning circuit 4 is inputted, the impulse speed and deviation are learned and the learning result of the learning circuit is stored into the register 5. The dial pulse detected after the learning result is stored refers to the stored learning result and recognizes a dial number at the recognizing circuit 6. Thus, the turned dial number can be correctly recognized.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention is used to transmit data from a rotary dial telephone after a line is connected.

The present invention relates to a dial pulse recognition system for rotary dial telephones. In particular, it relates to a dial pulse recognition method in which, after a line is connected, a dial number corresponding to a numerical value to be input is turned, the dial pulse is detected on the receiving side, and the dialed number is recognized.

〔overview〕

The present invention uses the line connection VF of a rotary dial telephone and the subsequent dial pulse recognition system. By referring to this and recognizing the number of dial pulses to be input later, the type of dial and mechanical deviations can be recognized and the number can be received accurately.

[Conventional technology]

Conventionally, the dial pulse recognition method, when inputting data using a rotary dial telephone, sends out a dial pulse by turning the dial corresponding to the number you want to input after connecting the line, and the receiving side detects the dial pulse. The recognition result was obtained by measuring the total time length from the first dial pulse to the last pulse.

[Problem that the invention seeks to solve]

However, in such a conventional dial pulse recognition method, the impulse speed of the dial pulse is 10 pulses per second (
Two types are used: IOPPS) and 20 pulses per second (20PPS), and since the deviation of the impulse speed of the dial pulse exists in the range of ±8%, it is simply the difference between the first pulse and the last pulse of the dial pulse. Recognizing dial pulses, which serve as input data, was a national problem if only the total time T was measured.

FIG. 2 is a diagram showing the relationship between the waveform of a dial pulse of a rotary dial telephone and time. First, Figure 2 (al) and Figure 2 (bl) are the waveforms when turning the dial 4 at an impulse speed of 10 PPS.
Figure (d) shows the waveform when the dial 8 is turned at an impulse speed of 20 PPS. The break time T shown in FIG.
The average value of the make time TC has the following criteria.

As a result, the total time length Tal shown in FIG. 2(a) is approximately 367 m5, or the total time length T shown in FIG.
3 □ is about 383, and there is almost no difference in the total time length T at 5 ms, and just by measuring the total time length T1, the impulse speed of dial 4 of 10 PPS is 20.
I can't tell if it's PPS dial 8 or not. In this way, the total time length T of an even dial number with an impulse speed of 201''PS and a half dial number with an impulse speed of 10 PPS is almost the same, and there is a drawback that it is impossible to determine which dial number it is.

Also, regarding the deviation of the impulse speed of dial pulses, for example, in the case of dial 0 with an impulse speed of 1 OPPS, the total time length T is 967 m5 ± 8%, and the range of 889.6 ms to 1044.4 ms is the allowable range. . In addition, in the case of dial 9 with the same impulse speed of 10Pr'S, 867m5 ±8% is 797.6ms ~
A range of 936.4 ms is an acceptable range. Due to this, when comparing the case of dial O and dial 9, it is 88
The range from 9.6 ms to 936.4 ms completely overlaps, and if the total time length T falls within this range, there is a drawback that it is impossible to determine which dialed number will be the recognition result.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned drawbacks, and aims to provide a dial pulse recognition system that can correctly recognize dialed numbers.

[Means for solving problems]

The present invention provides a dial pulse recognition method for a rotary dial telephone comprising a dial pulse detection circuit and a recognition means for recognizing a dial number from the dial pulse detected by the detection circuit. A learning circuit that inputs a dial pulse of a predetermined dial number, measures its time length, and learns its impulse speed, a register that stores the learning result of this learning circuit, and a register that stores the learning result and then detects it. and a recognition circuit that recognizes the dial number by referring to the learning result stored in the register.

[For production]

The learning circuit inputs the dial pulse of a predetermined dial number detected after the line is connected, and learns its impulse speed and deviation. The learning result of this learning circuit is stored in the register. In the identification circuit, the dial pulse detected after the learning result is stored refers to the stored learning result to recognize the dial number. Through the above operations, the dialed number can be correctly recognized.

〔Example〕

Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of a dial pulse recognition device according to an embodiment of the present invention. In FIG. 1, the dial pulse recognition device includes an input terminal 1 through which dial pulses are input manually, and a dial pulse detection circuit 2 that detects only dial pulse components.

In addition, after the line is connected, the dial pulse of a predetermined dial number which is the output of the dial pulse detection circuit 2 is input, and its total time length T is measured to identify its impulse speed, and the standard of the total time length T1 is It includes a learning circuit 4 that calculates a deviation with respect to a value, and a register 5 that stores the learning results of the learning circuit 4. Furthermore, the dial pulse detection circuit 2
Measure the total time length T3 of the dial pulse that is the output of
A recognition circuit 6 that recognizes the dialed number by referring to the learning result stored in the register 5, an output terminal 7 to which the output of the recognition circuit 6 is connected, and an output terminal 7 to which the output of the dial pulse detection circuit 2 is connected after the line is connected. A line 6 is connected to the learning circuit 4 and recognizes the output of the dial pulse detection circuit 2 after storing the learning result.
A switch 3 is provided.

The operation of the dial pulse recognition device having such a configuration will be explained. FIG. 2fa) and FIG. 2(C) show DC waveforms, and when the dial is rotated, the DC circuit opens and closes, resulting in such waveforms.

Further, at this time, impulse response waveforms as shown in FIGS. 2(b) and 2(d) are generated, and the waveforms excluding the DC component are transmitted to the receiving side through the line.

In FIG. 1, a dial pulse is applied to input terminal 1. In FIG. The waveforms at this time are shown in Fig. 2(b) and Fig. 2(d).
) shows the waveform. The dial pulse supplied to the input terminal 1 is input to the dial pulse detection circuit 2, which detects only the dial pulse component and supplies it to the switch 3. In the learning circuit of this embodiment, it is only necessary to input one predetermined dial number after the line is connected, so the switch 3 is closed to the learning circuit 4 side immediately after the line is connected. The dial pulse output from the dial pulse detection circuit 2 is input to the learning circuit 4 by the switch 3. The learning circuit 4 inputs the dial pulse of a predetermined dial number and determines whether the telephone has an impulse speed of 101''PS or 20PPS, and also calculates the deviation of the total time length T from the reference value.

For example, when a predetermined dial number is determined to be dial 0, the total time length T a x from the first pulse to the last pulse of the dial pulse is approximately 967 m5 in the case of a 10r'PS telephone, Further, in the case of a 20 PPS telephone, the time is approximately 483.5 ms. As a result, it is easy to determine whether a phone has an impulse speed of 10PPS (some phones have an impulse speed of 20PPS), but the reference value for the total time JET is In the case of dial O, the reference value is 9G7ms.

Next, the input total time length T a x of the dial O is measured, and the deviation Tdsr from the reference value is calculated using the following formula.

The differentiated results of this deviation Tdirf and impulse speed are stored in the register 5.

When the learning result is stored in the register 5, the switch 3 is closed to the recognition circuit 6 side, and then all dial pulse signals supplied to the input terminal 1 pass through the detection circuit 2 and are input to the recognition circuit 6 by the switch 3. Ru.

In the recognition circuit 6, the total time length T of the input dial pulse
1 is measured, stored in the register 5, and outputs the dial number as the recognition result to the output terminal 20 by referring to the learning result.

〔Effect of the invention〕

As described above, the present invention can correctly recognize data according to the type and deviation of the dial that transmits data, and can eliminate errors in received data.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a dial pulse recognition device according to an embodiment of the present invention. FIG. 2 is a diagram showing the relationship between the waveform of a dial pulse of a rotary dial telephone and time. 1...Input terminal, 2...Dial pulse detection circuit,
3... Switch, 4... Learning circuit, 5... Register, 6... Recognition circuit, 7... Output terminal, T,...
Total time length, Tb... Break time, TC... Meter time.

Claims (1)

[Claims] (1) In a dial pulse recognition method for a rotary dial telephone comprising a dial pulse detection circuit and a recognition means for recognizing a dial number from the dial pulse detected by this detection circuit, the recognition means comprises a predetermined number to be detected. A learning circuit that inputs the dial pulse of the dial number, measures its time length, and learns the impulse speed; a register that stores the learning results of this learning circuit; and a register that stores the learning results and detects them after the learning results are stored. A dial pulse recognition system comprising a recognition circuit that recognizes a dial number by referring to a learning result stored in the register.