JPS61276461A - Telephone set control system - Google Patents

Abstract

PURPOSE:To keep the quality of reception to a desired quality level by providing a switch circuit causing interruption of a microphone circuit depending on an output signal representing the non-transmission state from a state recognizing means. CONSTITUTION:A voice signal and a control signal are fed to a hand free telephone set 30 via a subscriber circuit 15 connected to a subscriber circuit 14. When a call of a speaker 22 is caused in the telephone set 30, speaker call information is sent to an exchange 10, where dial tone connection is caused, speaker-on information is sent to the telephone set 30 to set a switch circuit 20 and the listening of the dial tone is attained via the speaker 22. When a called party hooks on after the end of talking, a switch circuit 21 is turned off and the microphone 22 is turned off, a busy tone is generated and given to a caller. When the caller enters hooking on, the interruption information is given to the exchange 10 to turn off the switch circuit 21 of the speaker 22.

Description

[Detailed Description of the Invention] [Summary] In a telephone having a microphone circuit and a speaker circuit, when a transmitting state or a receiving state is recognized and the recognized transmitting state is not established, the microphone circuit is disconnected. The purpose of this is to prevent deterioration in reception quality.

[Industrial application field]

The present invention relates to a telephone set, and more particularly to a telephone set that disconnects a microphone circuit in response to reaching a predetermined state in the call order.

2. Description of the Related Art Telephones include, in addition to the well-known handset-type telephone, there are telephones equipped with a so-called hands-free function that includes a microphone circuit and a speaker circuit. Although this type of device is susceptible to howling due to its structure, measures to prevent howling are being taken to prevent deterioration in reception quality. However, even with these measures, it may still not be possible to achieve its completeness, so there is a need for ways to improve this.

[Conventional technology]

For phones equipped with the above-mentioned hands-free function,
In order to prevent echoing when receiving a call from a speaker and infiltration of ambient noise, the telephone must be equipped with a switch (key) or an audio switch, and the loss in the receiving or transmitting circuit can be controlled when transmitting or receiving a call to prevent howling, etc. We are trying to

[Problem that the invention seeks to solve]

In the former case, the user cannot be freed from the trouble of having to perform a selection operation to receive and receive calls using the speaker, or to send and receive calls using the microphone and speaker each time the call is made.

Furthermore, according to the latter, if the usage environment is within the intended usage environment, the howling prevention function of the voice switch can be fully demonstrated, but if the usage environment is far beyond such a usage environment, In a noisy environment, the voice switch loses its intended function.In other words, even when only receiving a call is required, such as when listening to a dial tone, busy tone, or when a call is being made, the voice switch loses its intended function as the sound input level increases. This leads to erroneous movements and makes it difficult to hear them.

The present invention was created in view of the above-mentioned problems, and its purpose is to provide a voice communication terminal device that can maintain reception quality at a desired quality level regardless of the usage environment. .

[Means for solving problems]

FIG. 1 shows a block diagram of the principle of the present invention. In this figure, 1 indicates a switch means interposed in the microphone circuit 2 of a telephone 30 having a microphone circuit and a speaker circuit, and 3 indicates a state recognition means, which indicates that it is not in a transmitting state based on control information notified from the exchange side. This is for generating a signal for recognizing the switching means 1 and switching the switch means 1 on and off.

[Effect]

A hands-free telephone or the like performs voice communication with a switching center or the like according to a predetermined communication order. If the communication state is not in a predetermined communication state in the communication order, that is, the communication state is not in the transmitting state, the state recognition means 3 recognizes the fact based on the control information sent from the exchange side, and issues a message to that effect. A signal is generated, and this signal turns off the switch hand vlt3. Thereby, it is possible to prevent deterioration in reception quality.

〔Example〕

Figure 2 shows a system configuration diagram implementing the present invention, and Figure 3 shows a system configuration diagram for implementing the present invention.
The figure shows a detailed configuration diagram of the hands-free telephone of the system shown in FIG. In FIG. 2, reference numeral 10 denotes an exchange, which is composed of a network 11, a common control unit (CPU) 12 for controlling switching of the network 11, a memory 13, and a subscriber circuit 14. The system is configured such that voice signals and control signals are supplied to the hands-free telephone 30 via a subscriber line 15 connected to the subscriber circuit 14.

The subscriber line 15 is connected to the voice signal line 1 as shown in FIG.
6 and a control signal line 17. The audio signal line 16 is directly connected to the handset 19 via a high-pre-rad circuit 18, and can also be connected from the hybrid circuit 18 to a speaker 22 and a microphone 23 via switch circuits 20 and 21. The switch circuit 20.21 is a microprocessor (μP) 24
Its on/off is controlled by. The microprocessor 24 has a serial/parallel conversion circuit 25. Hybrid circuit 26
It is connected to the control signal line 17 via.

As will become clearer from what will be described later, the control signal on the control signal line 17 is generated under the status management of the hands-free telephone set during the switching process in the exchange 10, and is generated according to the status management. The purpose of this is to perform on/off control of the speaker 22 and microphone 23 to prevent deterioration in reception quality. This will be explained in detail below with reference to FIGS. 4 and 5.

Input conversion information is generated in the control system of the above-mentioned exchange 10 and hands-free telephone 16 as shown in the flowchart of FIG. This input conversion information includes speaker 2
Speaker button press information indicating whether or not the speaker button for microphone 23 has been pressed; speaker button press information indicating whether or not the speaker button for microphone 23 has been pressed; and various state changes that occur in exchange 10. There is information. These are stored in the memory 13 of the exchange 10 as call state management data, and the status of these input change information (Sl in FIG. 4) is checked by the common control unit 12 of the exchange 10 (see FIG. 4). 82), a branch (33 in FIG. 4) is generated according to the check result, and processing (84 to S8 in FIG. 4) corresponding to the branch is entered. An example thereof will be explained with reference to FIG. When a speaker call occurs in a hands-free telephone, speaker call information 100 is sent to the exchange 10, and the exchange 10 establishes a dial-tone connection and sends speaker-on information (101,) to the telephone 30, which sends the speaker call information 100 to the switch circuit 2.
0 can be turned on and the dial tone can be heard through the speaker 22. Then, when the telephone 30 starts dialing, the dial digit information (102) is sent to the exchange 10, causing the dial tone to be disconnected. After dialing from the telephone 30 is completed (103), a ring tone is connected, the ring tone is heard by the called party, and when the called party answers, a communication path is created and the calling party's microphone 23 is turned on. (104), that is, the switch circuit 21 is turned on and the call is in progress.

When the call ends and the called party begins a disconnection operation, the microphone is turned off (105), that is, the switch circuit 2
1 off, a busy tone (reorder tone) connection is made, and the calling party is given a busy tone (reorder tone). When the caller enters a disconnection operation, disconnection information (106) is sent to the exchange 10 to terminate the call, and speaker-off information is provided to the telephone 30 to turn off the switch circuit 21 for the speaker. .

This process eliminates the problems that occur when using a voice switch, such as when listening to a dial tone is interrupted due to incorrect operation of the voice switch, and improves the quality of receiving calls. Become.

In addition, as another embodiment of the present invention, in a terminal device that does not exchange signals with an exchange, the microphone circuit may be disconnected by detecting a pre-specified receive-only state using a tone detection circuit or the like. Effects] As explained above, according to the present invention, the phyclophone circuit is disconnected so as not to interfere with hearing dial tones, etc. even in a noisy environment, which would otherwise occur when using a voice switch. Such defects can be removed and the quality of received calls can be improved.

[Brief Description of the Drawings] Fig. 1 is a block diagram of the principle of the present invention, Fig. 2 is a system configuration diagram implementing the present invention, Fig. 3 is a detailed configuration diagram of the hands-free telephone of the system shown in Fig. 2, and Fig. 4 The figure is a flowchart used to explain the present invention, and FIG. 5 is a diagram showing an example of a control procedure of the present invention. In FIG. 1, 1 is a switch means, 2 is a microphone circuit, and 3 is a state recognition means.

Claims (2)

[Claims] (1) In a telephone having a microphone circuit (2) and a speaker circuit, a state recognition means (3) for recognizing the call state of the telephone, and an output signal from the state recognition means (3) indicating that the telephone is not in a transmitting state. a switch means (1) for causing disconnection of said microphone circuit (2) in response to said telephone control system. (2) The telephone transmits and receives voice signals and control signals to and from the exchange (10), and the state recognition means (
3) has a control unit (24) that receives the control signal;
When the control unit (24) receives a control signal indicating that the transmitter is not in the transmitting state, the control unit (24) switches the switch means (1) to
2. The telephone control system according to claim 1, wherein a disconnection signal is sent to the telephone.