JPH05153218A - Telephone system - Google Patents

Abstract

PURPOSE:To provide a telephone set which automatically discriminates the dial system of a telephone line to be connected and automatically selects a coincident dial system. CONSTITUTION:A line closing means 2 forming the telephone line and a closed loop in accordance with an off-hook command signal, a dial tone detection means 3 detecting a dial tone from the telephone line after the closed loop is formed and generating a dial tone detection signal, a timer 6 clocking prescribed time, and a control means 1 which gives the off-hook command signal to the line closing means 2, when power is supplied, transmits a pulse dial '1' in the dial system that is set before power is supplied after the dial tone detection signal is obtained, sets the timer 6 and automatically switches the dial system to be transmitted when the dial tone detection signal is obtained after prescribed time that is clocked in the timer 6 are provided as first constitution.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telephone device having a plurality of dial type transmission functions of pulse dial and tone dial.

[0002]

2. Description of the Related Art When making a call from a telephone device, that is, making a call, a dial format must be selected according to the type of telephone line contracted with a telephone office. Therefore,
A conventional telephone device having a plurality of dial format transmission functions is equipped with a switch for switching dial formats, and the user operates the switches when installing the telephone device to dial the dial format of the contracted telephone line. I am trying to match.

[0003]

However, the user often does not know about such a contract at the time of installing the telephone device, and even if he / she knows, there is no explicit dial format in the telephone line to be connected. However, if the operator has forgotten to operate the switch, he cannot make a call, which causes a problem such as a failure and a mistake. Another problem is that there are many unnecessary complaints to telephone device manufacturers and sales companies.

The present invention is to solve the above-mentioned conventional problems, and provides an excellent telephone device that determines the dial format of a telephone line to be connected and automatically selects the matching dial format. To aim.

[0005]

In order to achieve the above object, the present invention has, as a first configuration, line closing means for forming a closed loop with a telephone line in response to an off-hook command signal,
Dial tone detecting means for detecting a dial tone from the telephone line after the formation of the closed loop and generating a dial tone detection signal; and a timer for measuring a fixed time,
When the power is turned on, the off-hook command signal is given to the line closing means to obtain the dial tone detection signal, then the dial "1" is sent to the telephone line and the timer is set in the dial format set before the power is turned on. However, when a dial tone detection signal is obtained after a fixed time counted by a timer, a control means for automatically switching the dial format to be transmitted is provided.

As a second configuration, line closing means for forming a closed loop with a telephone line in response to an off-hook command signal, and dialing from the telephone line after the closed loop is formed.
Dial / tone detection means for detecting a tone and generating a dial / tone detection signal, a timer for counting a fixed time, and the off-hook command signal to the line closing means when the power is turned on to provide the dial / tone detection signal. When a call is made to a predetermined called station by pulse dialing at 10 pps or 20 pps after the call is obtained and the pseudo dial tone from the called station is interrupted at regular intervals, the dial format is set to 20 pps or It has a configuration including a control means for switching to a pulse dial of 10 pps.

[0007]

With the first configuration, the pulse dial "1" is transmitted to the telephone line and the dial tone from the telephone line after a fixed time is detected. If the dial format sent is the same, no dial tone is obtained from the telephone line. When a dial tone is detected, the control means switches the dial format to tone dial. Calls that match the dial format of can be automatically made.

According to the second configuration, when a call is made to a specific called station by either 10 pps or 20 pps pulse dialing, and there is no predetermined response signal from the specific called station. Since the other pulse dial format is switched to, it is possible to automatically issue a pulse dial call that matches the dial format of the telephone line.

[0009]

1 is a block diagram showing a configuration of an embodiment of the present invention. In FIG. 1, reference numeral 1 is a control unit (control means) which performs various control operations of a telephone device. 2 is the control unit 1
In response to an off-hook command signal from the telephone, a closed loop is formed with the telephone line (hereinafter simply referred to as "line") to set the communication path, and the control unit 1 instructs the line to pulse.
A line closing unit 3 for sending a dial is a tone dial signal sending unit for sending a tone dial to a line according to an instruction from the control unit 1. Reference numeral 4 is a dial / tone detection unit that detects a 400 Hz dial tone transmitted from the telephone station via the line and supplies a dial / tone detection signal to the control unit 1. Reference numeral 5 is a ten-key unit for inputting a dial number. Is a timer for measuring a fixed time (in this case, 3 seconds), and 7 is a communication unit for transmitting and receiving.

Next, the operation of the above configuration will be described with respect to the first and second embodiments. First, in the first embodiment, when the telephone unit connected to the line is turned on and the control unit 1 is activated, an off-hook command signal is given to the line closing unit 2 so that the line is connected to the line. A closed loop is formed.
Then, the dial / tone detection unit 3 sends a 40
A dial tone of 0 Hz is detected, and a dial tone detection signal is supplied to the control unit 1. Control unit 1
Causes the line closing unit 2 to send out the pulse dial "1" and sets the timer 6. On the other hand, the telephone station stops sending dial tones if this line is of the pulse dial type, and continuously sends dial tones if it is of the tone dial type.

Therefore, in the control unit 1, the timer 6 is set to 3
After counting the seconds, it is possible to determine the dial format of this connected line by determining again whether or not there is a dial tone detection signal from the dial tone detecting unit 3. That is, if a dial tone detection signal is not obtained, a pulse signal corresponding to the number input from the ten-key unit 5 is given to the line closing unit 2 to send a pulse dial. When the dial tone detection signal is obtained, the number input from the ten-key unit 5 is given to the tone dial sending unit 3 to send the tone dial.

As described above, according to the first embodiment,
Since it is possible to automatically determine whether the connected line is in the pulse dial format or the tone dial format, it is possible to avoid setting the wrong dial format.

In the second embodiment, a terminal for dial format setting is provided as a specific called station in the manufacturing company or sales company of the present telephone device. When the telephone device is installed and the power is turned on, it is determined whether the line is a pulse dial or a tone dial by the same operation as in the first embodiment. 10 pps for pulse dial
In order to discriminate between the pulse dial of 10 pps and the pulse dial of 20 pps, the specific called station is dialed with the pulse dial of 10 pps, for example. This line is 10
In the case of pps, the called station is set up with the telephone device, and therefore 400 H at an interval of 3 seconds with respect to the telephone device.
Sends a pseudo dial tone for z. When the telephone set receives this pseudo dial tone, the line is set to 10
Since it is possible to determine that it is pps, thereafter, a 10 pps pulse dial is sent from the line closing unit 2 in accordance with the number input from the ten-key unit 5. On the other hand, if you do not get this pseudo-dial tone, you will automatically get 20
Switching to pps, the line closing unit 2 sends out a 20 pps pulse dial.

As described above, according to the second embodiment,
One line in the pulse dial format connected at the time of installation
Even if 0 pps is 20 pps is discriminated, even if different dial formats are set, it is possible to automatically switch to the dial format that matches the line.

In the second embodiment, 10 pps is used.
In order to determine the pulse rate of 20 pps or 20 pps, a specific called station is provided. However, since the call setup is made with the central office only in the case of a dial format that matches the line,
For example, the pulse rate may be determined by dialing the number "117" of the hourly notification service provided by the telephone station and receiving the information of the clock signal at 1-second intervals. It is also possible to use this method to determine whether or not it is a tone dial.

[0016]

As is apparent from the above embodiment, according to the telephone device of the present invention, the dial format of the connected telephone line is automatically determined, and even if the dial format is set incorrectly. In addition, it has an effect that it is possible to perform dial transmission by switching to a format that matches the line, and further has an effect that unnecessary complaints to the telephone device manufacturing company and the telephone company are reduced.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of a telephone device according to the present invention.

[Explanation of symbols]

1 control unit (control means) 2 line closing unit (line closing unit) 3 tone / dial signal sending unit 4 dial / tone detecting unit (dial / tone detecting unit) 5 ten-key unit 6 timer 7 call unit

Claims (3)

[Claims] 1. A telephone device having a plurality of dial type transmission functions, comprising line closing means for forming a closed loop with a telephone line in response to an off-hook command signal, and dialing from the telephone line after forming the closed loop. The dial / tone detection means for detecting a tone to generate a dial / tone detection signal, a timer for measuring a fixed time, and a control means for automatically switching a dial format to be sent to the telephone line, the control means When the power is turned on, after the off-hook command signal is given to the line closing means to obtain the dial tone detection signal, the line closing means is caused to send out a pulse dial "1" and the timer is set. Then
A telephone device, wherein when the dial tone detection signal is obtained after the fixed time counted by the timer, the dial format to be transmitted is switched to tone dial. 2. A telephone device having a plurality of dial type transmission functions including pulse dials of 10 pps and 20 pps, the line closing means forming a closed loop with a telephone line in response to an off-hook command signal, and forming a closed loop. The dial tone detection means for detecting a dial tone from the telephone line after that and generating a dial tone detection signal, a timer for measuring a fixed time, and a dial format sent to the telephone line are automatically switched. The control means provides the off-hook command signal to the line closing means when the power is turned on to obtain the dial tone detection signal, and then uses the pulse dial of 10 pps or 20 pps to perform a predetermined operation. A call is made to the called station, and a pseudo-dial tone is received from the called station that is intermittent at regular intervals. Itoki is the the dial format 20pps
Alternatively, a telephone device characterized by switching to a pulse dial of 10 pps. 3. The telephone device according to claim 2, wherein the control means makes a call to the predetermined called station after determining that the telephone line is of a pulse dial type.