JPH046937A - Dial mode automatic changeover telephone set - Google Patents

Abstract

PURPOSE:To automatically set the dial mode by allowing a dial mode storage section to store a signal sent in the absence of a dial tone after dialing of one digit. CONSTITUTION:When a dial tone discrimination section 14 detects a dial tone in the initial state where a line is connected and no signal is stored in a dial mode storage section 15, a dial output section 13 dials one digit of a pushphone signal and the signal is outputted to a telephone line through a dial circuit 6. When the dial tone is lost, the storage section 15 stores signal to be a tone signal by pushphone signal, and the output section 13 sends the pushphone signal through a tone line. If the dial tone is not lost, the dial pulse signal is dialed by one digit and outputted to the telephone line through the circuit 6. When dial tone is lost, the storage section 15 stores it that the signal is a dial pulse signal and the signal is sent from the output section 13 as the dial pulse signal through a pulse line.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a telephone that can automatically switch dialing modes.

(Prior Art) Traditionally, there are two types of telephone calls: a dial pulse system that uses a pulse line, and a touch tone signal system that uses a tone line. Therefore,
Some telephones are of the switchable type, allowing the dialing mode to be switched between pulse line and tone line. Such switcher-pull type telephones were provided with mechanical switches such as slide switches. By manually switching this switch, the dialing mode was matched to the line being used.

(Problems to be Solved by the Invention) However, the above-mentioned conventional telephone requires a mechanical switch such as a slide switch. Furthermore, if the dial mode of this switch does not match the dial mode of the line in use, calls will not be made, resulting in the inconvenience that someone with no knowledge of telephones may conclude that the telephone is malfunctioning.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a telephone that can automatically switch the dial mode without manual operation using a mechanical switch or the like.

(Means for Solving the Problems) The automatic dial mode switching telephone set of the present invention is a telephone set capable of switching to a pulse line using a dial pulse signal or a tone line using a touch-tone signal. A dial output section is designed to automatically dial a dial pulse signal or a touch tone signal by one digit when a dial tone is detected in the state, and a dial output section is configured to automatically dial a single digit with a dial pulse signal or touch tone signal. The device is equipped with a dial tone discriminating section for discriminating, and a dial mode storage section for storing the signal sent when the dial tone is absent based on the result of this discrimination.

(Function) When the telephone detects a dial tone from the exchange in the initial state where the dial mode is not stored in the telephone, the dial output section of the telephone automatically dials a single digit with a dial pulse signal or touch tone signal. . Then, the dial tone determining section determines whether or not there is no dial tone as a result of this negative digit dialing.

Then, the dial mode storage section stores the signal sent out when the dial tone disappears, and subsequent calls are made on the line using that signal.

(Example) Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

FIG. 1 schematically shows the overall configuration of an automatic dial mode switching telephone (hereinafter simply referred to as a telephone).

That is, this telephone is a telephone capable of switching between a pulse line using a dial pulse signal or a tone line using a touchtone signal, and the control circuit 1 automatically switches the dial mode between the pulse line and the tone line. ing.

The control circuit 1 includes a line 0N10FF control section 11, a line connection determination section 12, a dial output section 13, a dial tone determination section 14, and a dial mode storage section 15.

The line connection determination unit 12 is connected to the line connection detection circuit 2 and is configured to detect the connection state of the line.

The line 0N10FF control unit 11 is connected to the line switch circuit 3. Then, when the line connection determination unit 12 detects a line connection, the line switch circuit 3 turns the line ON.
A signal is sent out to put the communication circuit 4 into operation.

The dial tone discrimination section 14 is connected to the dial tone detection circuit 5 and is configured to detect a dial tone emitted when the telephone call circuit 4 is in an operating state.

The dial output section 13 is connected to the dial circuit 6. The dial output unit 13 outputs three types of signals: a 10 PPS dial pulse signal, a 20 PPS dial pulse signal, and a touch tone signal, and outputs them to the telephone line through the dial circuit 6. These three types of signals are such that when the dial tone discriminator 14 detects a dial tone in an initial state where no dial mode is stored, one digit of each signal is automatically dialed. However, if a predetermined signal among these three types of signals is stored in the dial mode storage section 15, that signal is always sent out.

The dial mode storage section 15 is configured to store, among the three types of signals outputted from the dial output section 13, the signal when the dial tone disappears. In other words, the 3 output when the call circuit 4 is in the call state is
By detecting a signal in which the dial tone disappears among each type of signal, it is possible to remember that the signal is being sent to the telephone line, that is, it is a signal that was on the line in use.

Next, the operation of this telephone will be explained.

First, when a line is connected, the line connection detection circuit 2 inputs to the line connection determination section 12 in the control circuit 1 that the line is connected.

Then, a line ON signal is output from the line vAON 10FF control unit 11 to the line switch circuit 3, and the telephone call circuit 4 enters the telephone call state.

Thereafter, the dial tone is detected by the dial tone detection circuit 5, and the dial tone discriminator-1 in the control circuit 1
4 is input that a dial tone has been detected.

When the dial tone discriminating section 14 detects a dial tone in an initial state where no signal is stored in the dial mode storage section 15, the dial output section 13 in the control circuit 1 outputs a "0
" is dialed in the negative digit and output to the telephone line through the dialing circuit 6.

Therefore, when the dial tone disappears, the dial mode storage section 15 stores that it is a tone line based on a touch tone signal, and from now on, the dial output section 13 outputs a tone line using a touch tone signal.
Signals are transmitted over tone lines using syphon signals.

If the dial tone does not disappear, the minus digit "0" is dialed by a dial pulse signal of 20 PPS, for example, and outputted to the telephone line through the dial circuit 6.

Therefore, when the dial tone disappears, the dial mode storage section 15 stores that it is a pulse line based on a 20 PPS dial pulse signal, and from now on, the dial output section 1
From 3 onwards, signals are transmitted via a pulse line using a 20PPS dial pulse signal.

If the dial tone does not disappear, the minus digit "0" is dialed by a dial pulse signal of, for example, 10PPS, and is outputted to the telephone line through the dialing circuit 6.

Therefore, when the dial tone disappears, the dial mode storage section 15 stores that it is a pulse line based on a dial pulse signal of 10PPS, and from now on, the dial output section 1
From 3 onwards, signals are transmitted via a pulse line using a dial pulse signal of 1 opps.

(Effects of the Invention) As described above, according to the present invention, the dial mode can be automatically set without using a mechanical switch such as a slide switch.

[Brief explanation of drawings]

FIG. 1 is a block diagram schematically showing the overall configuration of an automatic dial mode switching telephone according to the present invention. 13...Dial output section 14...Dial tone discrimination section 15...Dial mode storage section

Claims (1)

[Scope of Claims] 1) A telephone capable of switching to a pulse line using a dial pulse signal or a tone line using a touchtone signal, which automatically switches when a dial tone is detected in an initial state where no dial mode is stored. A dial output unit configured to dial a single digit of the dial pulse signal or touch tone signal; a dial tone determination unit configured to determine the presence or absence of a dial tone while dialing the dial pulse signal or touch tone signal by one digit; and a result of this determination. 1. A dial mode automatic switching telephone set comprising a dial mode storage section that stores a signal sent when a dial tone is lost.