JP3144565B2 - Telephone system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telephone system for automatically calling a line via a main unit from an extension telephone connected to a data terminal in accordance with an instruction from the data terminal. The present invention relates to a telephone system in which a function of detecting a response from a line to a main device is provided in a main device, and a result of detection by the main device is automatically notified to a data terminal instructing a call.

[0002]

2. Description of the Related Art Conventionally, as a telephone system for automatically making a call to a line via a main unit, a data terminal such as a computer is connected to one of extension telephones connected to the main unit. It is known that an extension telephone automatically makes a call to a plurality of lines connected to a main unit according to an instruction.

[0003] The response from the line to the automatic call is judged by the operator of the extension telephone connected to the data terminal by directly hearing the signal tone transmitted from the line via the main unit.

[0004]

However, in the above-described conventional apparatus, the data terminal instructing the call cannot directly know the response from the line to the call instruction. In such a case, when it is desired to proceed to the next processing in response to a response from the other party, the user has to wait for an input by the operator of the extension telephone, which is very inconvenient.

In order to solve this inconvenience, an extension telephone connected to a data terminal for instructing automatic calling is provided with a response detecting means for detecting a response from the line, and a call is generated by a detection output of the response detecting means. A configuration in which a response from the line is notified to the data terminal that instructed the call may be considered,
Such a configuration causes a problem that the processing on the extension telephone side becomes very complicated.

Therefore, the present invention has been made in view of such a conventional problem, and a response result from a line to a data terminal instructing a call without complicating the processing of the extension telephone is given to the data terminal. It is an object of the present invention to provide a telephone system capable of notifying the user of a telephone.

[0007]

In order to achieve the above object, the present invention relates to a data terminal for instructing a call, and an extension telephone connected to the data terminal for automatically calling according to an instruction from the data terminal. And a main unit connected to the extension telephone and performing a switching connection between the extension telephone and a plurality of lines, wherein a response from a plurality of lines to an automatic call by the extension telephone is provided.
A plurality of line interface means for detecting individually the
Based on the detection results of the plurality of line interface means,
Responses from multiple lines are detected collectively and the detection result
Control means for notifying the data terminal that instructed the automatic call based on information from the extension telephone .

[0008]

According to an instruction from a data terminal, an extension telephone automatically makes a call to a plurality of lines connected to a main unit, and responds to the automatic call from the plurality of lines by a control provided in the main unit. The detection is performed collectively by the unit , and the detection result is automatically notified to the data terminal that instructed the automatic call.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of a telephone system according to the present invention. In FIG. 1, a telephone system according to this embodiment includes a plurality of extension telephones 2.
And a main unit 30 connected to a plurality of lines L1 to Ln and one of a plurality of extension telephones 21 to 2m.
It is provided with a data terminal 10 composed of a computer connected to one extension telephone 21 and giving an automatic call instruction to the extension telephone 21.

Main device 30 has m extension interfaces (extension I / O) connected to extension telephones 21 to 2m, respectively.
F) n line interfaces (line I / Fs) 341 to 341 to 31m and n lines L1 to Lm, respectively.
34n, extension I / Fs 311-31m and line I / F 341
And a control unit 330 for controlling the switching circuits 320, the extension I / Fs 31 to 31m, the line I / Fs 341 to 34n, and the switching circuits 320.

Extension telephone 2 connected to data terminal 10
1 automatically makes an outgoing call to the lines L1 to Lm via the main device 30 according to an instruction from the data terminal 10. The details of the extension telephone 21 are shown in FIG.

In FIG. 2, an extension telephone 21 has an internal bus 21 connected to a central processing unit (CPU) 201.
2, a memory 202, a key circuit 203, and a liquid crystal display (LC
D) Driver 205 , extension interface (extension I /
F) 207, voice interface (voice I / F) 20
8. Data terminal interface (data terminal I / F) 2
11 is connected, a numeric keypad 204 is connected to the key circuit 203, and a liquid crystal display (LCD) 2 is connected to the LCD driver 205.
06 and connect the handset 209 to the audio I / F 208.
And the speaker 210, and the data terminal I / F 21
1 and a data terminal 10 connected thereto.

The extension I / F 207 is for transmitting and receiving a digitized voice signal and a control data signal to and from the main unit 30, and the memory 202 is for the CPU 20.
1, a handset 209 for inputting / outputting a call voice, a speaker 210 for generating a ringing tone, and a voice I / O. / F 208 is a telephone call voice input / output from the handset 209 or a speaker 210
A key circuit 203 for performing analog / digital conversion between an analog signal such as a ringing tone generated from a digital signal and a corresponding digital signal and switching input and output, and transmits information input from a ten key 204 to the CPU 201. A numeric keypad 204 is provided on the surface of the extension phone 21 for inputting information such as dial numbers, and an LCD driver 205 is provided for the
The LCD 206 is provided on the surface of the extension telephone 21 for displaying various information, and the data terminal I / F 211 is used to control the interface with the data terminal 10. For example, the data terminal I / F 211 and the data terminal 10 are connected by an interface line of the RS-232C standard.

FIG. 3 shows a line I provided in the main unit 30.
/ F341-34n is shown as a line I / F 341 as a representative. In addition, other line I / Fs 342-3
4n also has the same configuration as this line I / F 341.

In FIG. 3, a line I / F 341 includes a tone dialer 31, a codec 32, and a transmission amplifier circuit 3.
3, a receiving amplification circuit 34, a call progress tone detection circuit 35, a 2W / 4W conversion circuit 36, a dial pulse transmission circuit 37, and an incoming call detection circuit 38.

Here, a tone dialer 31 is for generating a tone type dial signal, and a codec 32.
Is for performing digital / analog conversion between a digital signal from the main unit 30 and a digital signal from the line L1. The 2W / 4W conversion circuit 36 is a two-wire signal from the codec 32 and a four-line signal from the line L1. A dial pulse sending circuit 37 is for generating a pulse type dial signal, and an incoming call detecting circuit 38 is for detecting an incoming signal from the line L1.

The call progress tone detection circuit 3
Reference numeral 5 denotes a call progress tone from the line L1, that is, a dial tone (dial tone), a busy tone (busy tone), a ringback tone (ringing tone), and a reversal of the polarity of the line due to a response from the other terminal. The signal indicating the type of the detected call progress tone and the signal indicating the polarity inversion of the line are sent to the control unit 33 of the main device 30.
Send to 0. Here, examples of the dial tone, the busy tone, and the ringback tone detected by the call progress tone detection circuit 35 are shown in FIGS.

That is, FIGS. 4A and 4B show the detection output of the dial tone by the dial tone and call progress tone detection circuit 35. FIG. The dial tone is 400 Hz as shown in FIG.
, And the detection output of the call progress tone detection circuit 35 corresponding to this dial tone is shown in FIG.
Is a signal that is continuously "1" as shown in FIG.

FIGS. 5A and 5B show the detection output of the busy tone by the busy tone and call progress tone detection circuit 35. FIG. As shown in FIG. 5A, the busy tone is an intermittent tone that intermittently interrupts a 400 Hz signal in a 0.5 second cycle. The detection output of the call progress tone detection circuit 35 corresponding to this busy tone is shown in FIG. As shown, the signal becomes “1” intermittently in a 0.5 second cycle.

FIGS. 6 (a) and 6 (b) show the detection output of the ring back tone by the ring back tone and call progress tone detection circuit 35. FIG. The ringback tone is a signal obtained by modulating 400 Hz at 16 Hz as shown in FIG. 6A. A 400 Hz signal is generated for 1 second, then 2 seconds off, a 400 Hz signal is generated for 1 second, and this is repeated. The detection output of the call progress tone detection circuit 35 corresponding to the ringback tone is "1" for one second as shown in FIG. 6 (b), and thereafter becomes "0" for two seconds, and again becomes "1" for one line. The signal is repeated.

The control unit 330 of the main unit 30 identifies a dial tone, a busy tone, and a ringback tone in accordance with the detection output of the call progress tone detection circuit 35.

Next, the specific operation of this embodiment will be described with reference to the sequence chart shown in FIG.

FIG. 7 shows a case where an automatic call is made from the data terminal 10 to the other terminal having the dial number 427-92-8717. In this case, the data terminal 10 sends an automatic call command and call information including the dial number to the extension telephone 21. Extension phone 2
Reference numeral 1 denotes this call information in the data terminal I / F 21 shown in FIG.
1 and sends outgoing signals and dial signals to the main unit 30 via the extension I / F 207 shown in FIG. Main device 30 receives the transmission signal and the dial signal via extension I / F 311 shown in FIG. 1 and sends them to control section 330.

Thus, the control unit 330 of the main unit 30 sends out a line capture signal to the corresponding line L1 to Ln by using one of the line I / Fs 341 to 34n, captures the line, and generates a dial tone from the line. When the return is detected from the detection output of the call progress tone detection circuit 35 shown in FIG. 3, the tone dialer 31 or the dial pulse transmission circuit 37 shown in FIG.
A dial signal corresponding to 7-92-8717 is transmitted to the line.

When a busy tone or a ringback tone returns from the line in response to the dial signal,
This is controlled by the control unit 330 of the main device 30 shown in FIG.
2 is transmitted to the extension telephone 21 via the extension I / F 311 shown in FIG. 1 as a progress display signal, and the progress telephone 21 Extension I / F2 shown in
07, a response corresponding thereto, that is, information indicating a busy tone or a ringback tone returned from the line, is transmitted to the data terminal I / F shown in FIG.
The data is transmitted to the data terminal 10 via the terminal 211. This allows the terminal to know the response result to the call request instructed to the extension telephone 21, that is, whether the other terminal is busy or calling.

When the ringback tone returns, when the partner terminal answers this call, the polarity of the line is inverted. This polarity inversion is detected by the call progress tone detection circuit 35, whereby a progress display signal indicating the response of the partner terminal is generated from the control unit 330 of the main device 30,
This is transmitted to the extension telephone 21 via the extension I / F 311 shown in FIG. 1 and received via the extension I / F 207 of the extension telephone 21 shown in FIG. Information indicating that the partner terminal has responded is transmitted to the data terminal I / F 21 shown in FIG.
1 to the data terminal 10. Thus, the terminal can know that the partner terminal has responded to the call request instructed to the extension telephone 21.

According to such a configuration, since the data terminal 10 instructing the call can directly know the response result from the partner terminal, the data terminal 10 performs the next processing in response to the response from the partner. It is very convenient when you want to move. In addition, since the response result from the partner terminal is collectively detected in the main device 30 and notified to the data terminal 10, there is no need to particularly change the configuration of the extension telephone 21.

[0029]

As described above, according to the present invention, the response from the line to the automatic call from the extension telephone in accordance with the instruction from the data terminal is controlled by the control provided in the main unit.
It is configured to detect all at once by the control means and automatically notify the detection result to the data terminal, so that the data terminal that has issued the call instruction can directly know the response to this call instruction, Since the processing at the data terminal is speeded up and the extension telephone connected to the data terminal does not need to be provided with a special response detecting means,
There is an effect that processing on the extension telephone side is not complicated.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of a telephone system according to the present invention.

FIG. 2 is a block diagram showing details of an extension telephone in the embodiment shown in FIG. 1;

FIG. 3 is a block diagram showing details of a line interface of a main device in the embodiment shown in FIG. 1;

FIG. 4 is a waveform diagram showing an example of a dial tone detected by the call progress tone detection circuit 35 shown in FIG. 3 and its detection output.

5 is a waveform chart showing an example of a busy tone detected by the call progress tone detection circuit 35 shown in FIG. 3 and its detection output.

FIG. 6 is a waveform diagram showing an example of a ringback tone detected by the call progress tone detection circuit 35 shown in FIG. 3 and its detection output.

FIG. 7 is a sequence chart for explaining the operation of the embodiment shown in FIG. 1;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Data terminal 21-21n Extension telephone 30 Main apparatus 31 Tone dialer 32 Codec 33 Transmitting amplifier circuit 34 Receiving amplifier circuit 35 Call progress tone detection circuit 36 2W / 4W conversion circuit 37 Dial pulse transmission circuit 38 Incoming call detection circuit 201 Central processing Processing device (CPU) 202 Memory 203 Key circuit 204 Numeric keypad 205 LCD driver 206 Liquid crystal display (LCD) 207 Extension interface (extension I / F) 208 Voice interface (voice I / F) 209 Handset 210 Speaker 211 Data terminal interface (Data Terminal I /
F) 212 internal bus

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) H04Q 3/58 101-107 H04M 3/42 H04M 11/00-11/10

Claims (1)

(57) [Claims] 1. A data terminal for instructing a call, an extension telephone connected to the data terminal and automatically making a call according to an instruction from the data terminal, and a plurality of extension telephones connected to the extension telephone. And a main unit for making an exchange connection with a line, comprising: a plurality of lines for automatic calling by the extension telephone.
A plurality of line interface means for individually detecting the response, based on the detection results of the plurality of line interface means,
Collectively detect responses from the plurality of lines and detect the
A control unit for notifying the data terminal instructing the automatic call based on information from the extension telephone , and control means for providing the result to the main unit.