JP2577816B2 - Telephone system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a plurality of telephones connected to a private branch exchange connected to a telephone line. The present invention relates to a telephone system configured so that a ringing tone is transmitted from an existing telephone.

(Prior Art) In a telephone system having a plurality of telephones capable of simultaneously calling a plurality of extensions and outputting a ring tone from the calling telephone, a plurality of extensions are simultaneously called. When a ringing tone (hereinafter referred to as a ringback tone) is transmitted from a calling telephone and any one of the called telephones answers, the calling telephone sets the answering telephone. Is possible, and the call to another telephone is continued.

(Problems to be Solved by the Invention) In this case, since the link back tone is continuously transmitted from the calling telephone, even if an extension call is attempted with the telephone that has responded to the call, the ring back tone is used. However, it may cause annoyance and make it difficult to hear each other's calls. Therefore, during the extension call, the extension call had to be temporarily suspended.

The present invention has been made in view of such circumstances, and its purpose is to stop sending a ringback tone and perform an extension call of other telephones when the telephone is in an extension communication state with the answering telephone. It is an object of the present invention to provide a telephone system that enables an extension call with a telephone that has answered.

(Means for Solving the Problems) In order to solve the above problems, in the telephone system of the present invention, a plurality of telephones are connected to a private branch exchange connected to a telephone line, and simultaneous calls of a plurality of extensions are possible. And wherein a ringing tone is transmitted from the calling telephone, when any one of the telephones answers and enters a call state from the state of simultaneous ringing of a plurality of extensions, Control means for continuing the call to the telephone and stopping the transmission of the ringing tone.

(Operation) When any one of the telephones answers and enters a call state from the state of simultaneous ringing of a plurality of extensions, the control means continues the call to the other telephones and transmits a ringing tone. Perform stop control. As a result, it is possible to make an extension call with any telephone even while the extension is being called to another telephone.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing the electrical configuration of each telephone constituting the telephone system of the present invention. However, since all the telephones have the same configuration, only one telephone is shown in the drawing.

In FIG. 1, a communication path 11 for transmitting and receiving a voice signal includes:
An input / output sound control unit 13 for controlling the opening and closing of the communication path 11 is connected, and the output of the microphone 17 incorporated in the handset and the input of the speaker 18 are connected to the input / output sound control unit 13, respectively. Have been. In addition, a signal processing control unit 15 for processing input / output signals is provided in a signal path 12 for transmitting and receiving control signals.
Are connected, and an output of a key input detection unit 16 that detects key inputs of various operation keys is guided to the signal processing control unit 15. The output of a dial button provided with a numeric keypad (not shown) is guided to the key input detection unit 16, and the output of an extension call button 19 for calling another extension telephone is guided. The signal processing control unit 15
Outputs a control signal instructing connection / disconnection of the communication path 11 to the input / output sound control unit 13 and instructs the ringback tone output unit 14 to send or stop sending the ringback tone. The control signal is being output.
The output of the ringback tone output unit 14 is guided to the input / output sound control unit 13. Although not shown, each telephone having the above configuration is connected to a private branch exchange connected to a telephone line.

 Next, the operation of the telephone system having the above configuration will be described.

First, when the user presses the extension call button 19 of the telephone, the key input detection unit 16 detects the press operation, and sends a detection signal to the signal processing control unit 15.
Based on the detection signal, the signal processing control unit 15 outputs a control signal to the input / output sound control unit 13 to operate the input / output sound control unit 13, connects the communication path 11 and the telephone, and makes a call. Send information to each telephone. The signal processing control unit 15
The ringback tone output unit 14
To output a ringback tone to the input / output sound control unit 13. The input / output sound control unit 13 sends this ring back tone to the speaker 18, and is in a state of calling a plurality of extensions simultaneously.

In this state, when one of the calling telephones picks up the handset and responds, the response signal is sent to the signal processing control unit 15 through the signal path 12. In response to this response signal, the signal processing control unit 15 outputs an operation stop signal to the ring back tone output unit 14, stops the operation of the ring back tone output unit 14, and stops the transmission of the ring back tone. In addition, the signal processing control unit 15 outputs a signal indicating a callable state to the input / output sound control unit 13 based on the response signal. The input / output sound control unit 13 communicates with the communication path 11 and the microphone 17 based on the signal indicating the communication enabled state.
And the connection with the speaker 18. Thus, an extension call can be made between the user of the telephone and the user of the telephone that has responded to the extension call. At this time, the extension call continues to other telephones that have been called simultaneously, but since the ringback tone is not transmitted from the ringback tone output unit 14, the extension call is not affected by the ringback tone. Becomes possible.

Also, at this time, although not shown, the LE
It is possible to provide a display unit such as D and illuminate this LED while the extension call is continuing to other telephones to notify the user that the extension is being called. is there.

(Effect of the Invention) The telephone system of the present invention, when an arbitrary one of the telephones answers and enters a call state from the state of simultaneous ringing of a plurality of extensions, continues to call another telephone, Since the transmission of the ringing tone is stopped, it is possible to perform an extension call with the answering telephone without being affected by the ringing tone while the extension is being called to another telephone. Play.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an electrical configuration of a telephone constituting the telephone system of the present invention. 11: Call path 12: Signal path 13: Input / output sound control unit 14: Ring back tone output unit 15: Signal processing control unit 16: Key input detection unit 17: Microphone 18: Speaker 19 … Extension call button

 ──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Masayoshi Seo 22-22 Nagaikecho, Abeno-ku, Osaka-shi, Osaka Inside Sharp Corporation (56) References JP-A-2-312429 (JP, A) JP-A-62- 207098 (JP, A)

Claims (1)

(57) [Claims] A plurality of telephones are connected to a private branch exchange connected to a telephone line, a plurality of extensions can be simultaneously called, and a ringing tone is transmitted from the calling telephone. In the telephone system, when any one of the telephones answers and goes into a talking state from the state of simultaneous ringing of a plurality of extensions, the calling to another telephone is continued and the transmission of a ringing tone is stopped. A telephone system provided with control means for performing control.