JPS6373748A - Telephone set - Google Patents

Abstract

PURPOSE:To automatically receive a service for a push-phone subscriber by the subscriber agreement of a dial pulse, by outputting the dial pulse at the time of outputting the telephone number of an opponent, and switching automatically the output of a push-button dial in busy to a multifrequency signal. CONSTITUTION:At the time of incoming call, an incoming call detection signal 5 is outputted from an incoming call detection circuit 4 by a ring tone detection signal 3 from a ring tone detection circuit 2, and the condition of off-hook, and a switching signal 7 from a switching circuit 6 makes a dial pulse generation circuit 8 invalid, and validates a multifrequency signal generation circuit 9. Meanwhile, an outgoing call is performed by the dial pulse, and since the polarities of lines L1 and L2 are inverted by the response of the opponent, a polarity inversion signal 12 is outputted by a polarity inversion detection circuit 11, and the switching signal 7 is outputted from the switching circuit 6. In such a manner, the dial pulse generation circuit 8 is made invalid, and the multifrequency signal generation circuit 9 is validated, and the output of the push-button dial 10 in busy is outputted to the lines L1 and L2 as the multifrequency signal.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a push-button dial telephone capable of outputting dial pulses and multifrequency signals.

〔overview〕

The present invention is a push-button dial telephone capable of outputting dial pulses and multi-frequency signals, in which the dial pulse is output when outputting the other party's telephone number for line connection, and the output of the push-button dial during a call is automatically converted into a multi-frequency signal. By switching automatically, subscribers to Dial Pulse can automatically receive services for Bushiphone subscribers.

[Conventional technology]

The basic fee for a dial pulse telephone subscription contract is low, but
Dial pulse telephones cannot receive seat reservation services, computer services, or other services that are accessed using a frequency signal.

Some conventional telephones can transmit both dial pulses and multi-frequency signals, but these must be switched manually.

[Problem that the invention seeks to solve]

However, in such conventional telephones, this switching operation is troublesome and has the disadvantage that errors such as forgetting to switch are likely to occur.

SUMMARY OF THE INVENTION The present invention aims to solve the above-mentioned drawbacks and to provide a telephone that can automatically receive services for a telephone subscriber with a Dial Pulse subscription.

[Means for solving problems]

The present invention provides a push button dial, a dial pulse generation circuit that generates a dial pulse according to the output of the push button dial, a multifrequency signal generation circuit that generates a multifrequency signal according to the output of the push button dial, and a dial pulse generation circuit that generates a multifrequency signal according to the output of the push button dial. In a telephone equipped with a generation circuit and a switching control means for enabling one of the multi-frequency signal generation circuits, the switching control means includes an incoming call detection circuit that outputs an incoming call detection signal based on a ring tone and an off-footer. , the polarity reversal detection circuit that detects the polarity reversal of the telephone line and the dial pulse generation circuit are always enabled, and when there is an output from the incoming call detection circuit or an output from this polarity reversal detection circuit, the multifrequency signal is activated. The present invention is characterized by comprising a switching means for outputting a switching signal for enabling the signal generating circuit.

[Effect]

When making a call, the dial pulse generation circuit is enabled immediately after the off-footer. When the other party responds, the polarity reversal detection circuit detects this and activates the multifrequency signal generation circuit. When a call arrives, the incoming call detection circuit continuously detects a ring tone and an off-footer, which disables the dial pulse generation circuit and enables the multi-frequency signal generation circuit. Switching is performed automatically without any switching operation, and services for various types of smartphone subscribers can be received.

〔Example〕

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

The figure is a block diagram of a telephone set according to an embodiment of the present invention. This telephone has one push button dial 10,
It includes a dial pulse generation circuit 8 that generates a dial pulse according to the output of the push button dial 10, and a multifrequency signal generation circuit 9 that generates a multifrequency signal according to the output of the push button dial 10. The output signals of dial pulse generation circuit 8 and multifrequency signal generation circuit 9 are both connected to lines L+ and Lx, but a switching circuit 6 is provided to enable only one of them.

A ring tone detection circuit 2 is connected to the line SL via the b side of the contact 1 of the CML relay. Further, a polarity reversal detection circuit 11 is connected to the lines , , and L via the a side of the contact of the CML relay.

The incoming signal detection circuit 4 is a circuit that receives the output of the ring tone detection circuit 2 and the off-hook signal of this telephone set, and outputs an incoming call detection signal 5.

The switching circuit 6 inputs the incoming call detection signal 5 and the output polarity inversion signal 12 of the polarity inversion detection circuit 11, and enables one of the dial pulse generation circuit 8 or the multifrequency signal generation circuit 9 and disables the other. This is a circuit that generates a switching signal 7.

To explain the operation of this device, when a call is received, line L1,
When a ring tone is input from L2, the ring tone detection circuit 2 rings a calling bell.

Ring tone detection signal 3 from ring tone detection circuit 2
According to the off-footer condition, an incoming call detection signal 5 is outputted from the incoming call detection circuit 4 and inputted to the switching circuit 6.

A switching signal 7 from the switching circuit 6 disables the dial pulse generation circuit 8 and enables the multifrequency signal generation circuit 9. As a result, during the off-footer state at the time of incoming call, the signal from the push button dial 10 is transmitted as a multi-frequency signal by the multi-frequency signal generating circuit 9 and output to , Lm. On the other hand, when a call is made, the ring tone detection signal 3 is not output even if the call is off-hook, so the switching signal 7 is not output. Therefore, dial pulse generation circuit 8 is enabled and multifrequency signal generation circuit 9 is disabled.

The telephone number requesting line connection is made by dialing pulses. Further, when the other party responds, the polarity of lines 3 and L2 is reversed, so that the polarity reversal detection circuit 11 outputs a polarity reversal signal 12, and the switching circuit 6 outputs a switching signal 7. As a result, the dial pulse generation circuit 8 is disabled and the multifrequency signal generation circuit 9 is enabled. Therefore, the output from the push button dial 10 during a call is line L.
+, Lz as a multi-frequency signal, and it is possible to receive various button services.

〔Effect of the invention〕

As described above, the present invention outputs a dial pulse when outputting the telephone number of the other party to connect a line, and all outputs of push-button dialing during a call are automatically switched to multifrequency signals. Therefore, with a low dial pulse contract, the caller has the excellent effect of being able to enjoy various types of telephone services without having to perform any switching operations.

[Brief explanation of the drawing]

The figure is a block diagram of a touch-type dial telephone according to an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1...CML relay, 2...Ring tone detection circuit, 3...Ring tone detection signal, 4...Incoming call detection circuit, 5...Incoming call detection signal, 6...Switching circuit, 7... Switching signal, 8... Dial pulse generation circuit, 9... Multi-frequency signal generation circuit, 10... Push button dial, 11... Polarity reversal detection circuit, 12... Polarity reversal detection Signal, new Lt...line.

Claims (1)

[Claims] (1) A push-button dial, a dial pulse generation circuit that generates a dial pulse according to the output of the push-button dial, a multi-frequency signal generation circuit that generates a multi-frequency signal according to the output of the push-button dial, and the dial pulse generation circuit. and a switching control means for enabling one of the multi-frequency signal generation circuits, the switching control means comprising: an incoming call detection circuit that outputs an incoming call detection signal based on a ring tone and an off-hook; The polarity reversal detection circuit that detects polarity reversal of the telephone line and the dial pulse generation circuit mentioned above are always enabled.
A telephone set comprising switching means for outputting a switching signal for enabling the multi-frequency signal generation circuit when there is an output of the incoming call detection circuit or an output of the polarity reversal detection circuit.