JPS63316551A - Hands free telephone device - Google Patents

Abstract

PURPOSE:To prevent the turning-off of a receiving path by turning off the transmitting path of a hands free circuit up to a called person's response and stopping the changing-over control of the hands free circuit. CONSTITUTION:A processor 14 executes a data transmitting processing between respective slave devices 41-4m at a constant period. At this time, while the slave devices do not grasp a line wire, the line wire grasping is executed, transmitting data are sent to a control part 36 of the slave device side, a hands free circuit 32 and a switch SW1 are turned on, a switch SW2 is turned off, the action of a microphone 39 is turned off, and a receiving loud speaking mode is obtained. While the line wire is grasped, a dial output processing is executed and when a reverse circuit 10 detects the called person's response, the processor 14 sends the data accompanying the called person's response to the control part 36, based on the transmitting data, the SW2 is turned on, the microphone 39 is turned on, and a hands free mode is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a hands-free telephone device that allows telephone calls while the handset is turned on.

[Conventional technology]

Conventionally, this type of hands-free telephone device captures an outside line when the telephone is on-hook, and connects the captured outside line to a microphone and speaker via a hands-free circuit, thereby making it possible to make hands-free calls while the handset is on. is configured to do so.

[Problem that the invention seeks to solve]

However, in such conventional telephone devices, when dialing from a hands-free telephone in an on-hook state, the outside line is captured in the hands-free state, so if the surrounding noise is large, the hands-free circuit changes the receiving path. However, the dial tone will not be heard before dialing, and the ringback tone (
There was a problem in that the outside line status could not be identified because the caller could not hear the ringing tone or busy tone.

[Means for solving problems]

In order to solve these problems, the present invention provides a hands-free telephone device that captures an outside line in an on-hook state and connects the captured outside line to a microphone and a speaker via a hands-free circuit to perform a hands-free passage. a called party response detection means for detecting a called party response; and a called party response detecting means for detecting a called party response; and mode control means for allowing operation of the microphone and setting it in a hands-free mode.

[For production]

Therefore, in the present invention, when making a dialing call using the I-phones-free, the transmitting path of the hands-free circuit is cut off and the switching control of the hands-free circuit is stopped until the called party answers. It is possible to prevent the receiving path from being disconnected.

〔Example〕

Hereinafter, the present invention will be explained in detail based on embodiments shown in the drawings.

FIG. 1 is a block diagram showing an embodiment of the present invention.
Below, we will show the case where it is applied to a slave device. In Figure 1,
Reference numeral 1 denotes a main device of the key telephone device, and to this main device 1, external lines 21 to 2n, such as a central office line from a telephone office or a telephone line from a private branch exchange, are connected via an external line terminal, -Ln. and connector CNI=CNm and each one
The slave units 41 to 4m are connected via lines 31 to 3m of paired communication lines and signal lines, and the p1 external lines 21 to 2n are
Each of them is connected to the communication path switch 12 via reverse detection circuits 101 to 10n and outside line interfaces 11+ to 11n. On the other hand, the communication path switch 12 and each handset 4
! The lines 31 to 3 m from 4 m are connected via telephone interfaces 13 t to 13 m, and exchange connections are made by cross points such as analog switches or relay contacts in the communication path switch 12. .

Note that the reverse detection circuits 101 to 10n are connected to the slave units 41 to 10n.
After dialing the called party from 4m, it has a called party response detection function for detecting a reverse signal due to the called party's response. In addition, the outside line interfaces IL+ to 11n have functions such as incoming call detection, closing of a DC loop for the outside line, holding, and dialing using a pulse signal or a composite audio frequency signal. While performing the exchange connection function between the outside lines 21 to 2n and the handsets 41 to 4m and between each handset 41 to 4m, the telephone interfaces 13t to 13m perform calls to the handsets 41 to 4m via the telephone line. The controller is responsible for supplying power for use, transmitting and receiving data signals via signal lines, and supplying power for control.

The Dosei M1 is also equipped with a control section that includes a processor 14 such as a microprocessor, a fixed memory (hereinafter referred to as ROM) 15, and a variable memory (hereinafter referred to as RAM) 16. , the control is performed while accessing predetermined data to the RAM 16, and the reverse detection circuit 10+
The reverse detection circuit 10t makes control decisions based on the detection of called party responses from ~10n, the detection of incoming calls from outside line interfaces 111~11n, and the operation data from handsets 41~4m via telephone interfaces 131~13m. ~10n, outside line interface 111~11
n, communication path switch 12. Telephone interface 13
1 to 13m, and transmits control data via telephone interfaces 13s to 13m.
It is designed to control distances of 1 to 4 m.

On the other hand, in the handset 41 to 4m, the communication circuit 31
and hands-free circuit 32 hook switch H8,'
Connected to call@33 via ft. In this hands-free circuit 32, a first switch SWl, which is normally off and turns on in the hands-free state, is connected to the hook switch H8I side, and a first switch SWl inserted into the amplifier input stage of the transmission path is connected to the hook switch H8I side. A microphone 39 is connected through the switch SW2 of No. 2, and a speaker 40 is connected to the amplifier output stage of the reception path. Also, signal line 3
4 is connected via a transmission circuit 35 to a processor similar to the control section of the main device 1, but smaller in scale, ROM, and RA.
A control unit 36 consisting of M is connected to the hands-free circuit 32 and the switches sw, , SW2, and also controls the digital display and tone generator in the display circuit 37, and controls the control unit 36 via the transmission circuit 35. In accordance with the data, the hands-free circuit 32 is controlled to switch, the display is displayed, and an incoming ring tone is sent out, and in accordance with the control data, each indicator light in the keyboard 38 is controlled to turn on or off once. At the same time, in response to the operation of each key on the keyboard 38 and the operation of the hook switch H8, operation data indicating these conditions is transmitted to the transmission circuit 3.
Some of them are sent via 5.

The transmission circuit 35 has an IL source separation function, extracts the power supplied from the main device 1111tl via the signal line 34, stabilizes it, and supplies it to each necessary part as a local power supply. supplying.

Therefore, when any handset 4IIC goes off-hook, its operation data is received by the processor 14, and the keys on the keyboard 38 are operated in the same manner.
The processor 14 controls the call path switch 12 according to the operation of the outside line key or the extension key and the operation of the dial key, and performs exchange connection, and in the case of an outside line call,
A dial call is made under the control of the selected outside line interface 11, and if it is an extension call, the other party's handset 4
The extension ringing tone is emitted under the control of the display circuit 37, and the call state is established when the other party responds.

Also, outside line 2. The incoming call from ~2n is detected by the outside line interfaces 111~Iln, and in response to this, the processor 14 controls the display circuit 37 of each handset 41~4m to emit an outside line incoming ringing tone. responds by going off-hook, processor 14 controls call path switch 12 accordingly to complete the call path.

Note that, at the same time as these controls, the indicator lights in the keyboard 38 are also controlled, and the corresponding lights are turned on.

Furthermore, a hands-free call made by dialing from any handset 4 in an on-hook state will be described with reference to the flowchart of FIG. 2.

FIG. 2 shows a flowchart of acquiring an outside line from hands-free. In FIG. 2, processor 1
4 performs initial processing (step 101).
), data transmission processing is performed between each slave unit 41 to 4m at regular intervals (step 102). At this time, it is determined whether the handset is acquiring an outside line or not in step 1O3.
], if the outside line is being acquired, the process proceeds to step 111 described later; if the outside line is not being acquired, the state of the outside line key is checked based on the received data (step 104). If the outside line key is off, other processing is performed (step 108), and if it is on, step 1
Proceed to step 05 and check whether there is an open line. Here, if it is not an air line, other processing is performed (step 109).
), if it is an outside line, acquire the outside line (step 1
06). As a result, the processor 14 sends the transmission data to the control unit 36 on the handset side, and based on the data, the processor 14 sends the transmission data to the control unit 36 on the handset side, and based on the data, the handsfree circuit 32 and the first switch SW are activated.

At the same time, the second switch SW! is turned off (OFF), the operation of the microphone 39 is turned off (stopped), and the reception amplification mode is set (step 107). After this processing, steps 102 and subsequent steps are repeated via other processing routines (step 110).

Further, if it is determined in step 103 that an outside line is being acquired, the process advances to step 111 to check the status of the incoming outside line.

Here, if there is an incoming outside line, perform other processing (
In step 118), if the incoming outside line is not in progress, the process proceeds to the next step 112. At this time, if the called party's handset is on-hook, it outputs a dial output according to the dial key operation for the called party (step 113), performs the dial output process (step 114),
Reverse detection is performed (step 115), and it is determined whether the called party responds (step 116). Here, when the reverse detection circuit 10 detects a called party response, the processor 14 receives the detection output, sends the data accompanying the called party response to the control unit 36 on the handset side, and converts the transmitted data into Based on the second switch SW! Turn on microphone 3.
9 is allowed (ON) to set the hands-free mode (step 117).Thereby, a hands-free call can be made in response to a response from the called party.

However, if it is not on-hook in step 112, dial output and dial output processing are performed in the same way as in steps 113 and 114 (step 1).
19, 120) and other processing routines 110, steps 102 and subsequent steps are repeated.

In the above-mentioned example, the present invention was applied to a hands-free handset of a key telephone device, but it may also be applied to a stand-alone telephone. In addition, in order to use the /SS noise-free circuit only for receiving loudspeakers, the transmitting path was cut off using switch SW2, but mode switching is not limited to this, and the mode can be changed by using the transmitting amplifier, for example, which constitutes the noise-free circuit. The control unit may be controlled.

〔Effect of the invention〕

As explained above, according to the present invention, when making a dial call using a phone call, the microphone of the telephone is turned on after detecting the reverse response of the other party after the dial is sent, thereby making it possible to hear the ringing tone of the other party. The busy tone is less audible9, and the outside call status can be easily identified.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention, and FIG. 2 is a flowchart for explaining its operation. 1... Main device, 4! ~4m...Hands-free telephone (receiver unit L10+~10n...Reverse detection circuit, 32...Hands-free IJ-circuit, 39...e-microphone, 40...Shiker, sw,, SW2
...-Switch.

Claims (1)

[Claims] A called party response detection means for detecting a called party response in a hands-free telephone device that captures an outside line in an on-hook state and connects a microphone and a speaker to the captured outside line via a hands-free circuit to perform a hands-free passage. ,
Mode control means for stopping the operation of the microphone when an outside line is acquired in an on-hook state to set the voice reception mode, and for allowing the operation of the microphone to set the hands-free mode according to the output of the called party response detection means. A hands-free telephone device comprising: