JPH02312425A - Telephone set capable of controlling ambient sound volume - Google Patents

Abstract

PURPOSE:To surely listen to an incoming tone and the content of transmission from a talking opposite party in talking by providing a control circuit reducing the sound volume of an ambient acoustic equipment on the condition that an incoming signal detector detects the arrival of an incoming signal and a DC loop detector detects the forming of a DC loop. CONSTITUTION:When an incoming signal reaches a telephone set 10, a photocoupler P1 as an incoming signal detector detects the incoming signal and a control circuit 100 reduces the sound volume of a ambient acoustic equipment 12. When the telephone set 10 is in the talking state replying with an incoming call or in the talking state in succession to the dialing, a photocoupler P2 being a DC loop detector detects the forming of the DC loop in telephone trunk lines L1, L2 and the control circuit 100 reduces the sound volume of the ambient acoustic equipment 12 based on the result of detection of the photocoupler P2. Thus, even under the use of the ambient acoustic equipment, the incoming tone is surely listened to without the troublesome manual adjustment of the sound volume and the transmission content from the talking party is surely grasped in talking.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a telephone capable of controlling ambient sound volume.

[Prior Art] Conventionally, as described in Japanese Utility Model Application Publication No. 83-185332,
A system has been proposed that detects the brightness of the surroundings and adjusts the volume of the ringtone of a telephone according to the detected brightness of the surroundings. According to this, (1) the ringtone is automatically turned up louder during bright daytime hours to notify family members of incoming calls even in environments with some ambient noise, and (2) the ringtone is turned up automatically when it is dark at night. It is possible to automatically reduce the size of the call and notify family members of the incoming call without greatly disturbing the quietness of the surrounding area.

[Problems to be Solved by the Invention] However, with the above-mentioned conventional telephone, the volume of ambient sound equipment such as a television or stereo in the room is high, regardless of the surrounding brightness. Ringtones are often not fully audible without cumbersome manual adjustments.

Incidentally, Japanese Patent Laid-Open No. 63-280251 proposes a device that automatically reduces the sound of a television, stereo, etc. only while the telephone is in use. However, this device detects when the telephone handset is off-hook and reduces the volume of the ambient sound device based on this detection. Therefore, although it is effective when making a call or making a call, it does not operate at all when receiving a call while the handset is still in the on-footer state.

The present invention aims to ensure that a ringtone can be heard even when using an ambient sound device without cumbersome manual adjustment of its volume.

Further, the present invention aims to ensure that a ringtone can be heard even when an ambient sound device is used without cumbersome manual adjustment of the volume, and also to ensure that the content of what is being said from the other party during a call can be heard. purpose.

[Means for Solving the Problems] The present invention as set forth in claim 1 provides an incoming signal detector in a telephone that is used by being connected to a telephone office line and has a speech circuit and a ringer circuit. and additionally includes a control circuit that reduces the volume of the surrounding acoustic device on the condition that the incoming signal detector detects the arrival of an incoming signal.

The present invention as set forth in claim 2 provides a telephone set that is used by being connected to a telephone office line and has a calling circuit and a ringer circuit. and a DC loop detector for detecting the ambient sound The device is additionally equipped with a control circuit for reducing the volume of the device.

[Action] According to the present invention as set forth in claim 1, there is the following effect (1).

(1) When an incoming signal arrives at the telephone, the incoming signal detector detects the incoming signal, and the control circuit reduces the volume of the ambient sound device based on the detection result of the incoming signal detector. Therefore, even when an ambient sound device is used, the ringtone can be reliably heard without cumbersome manual adjustment of the volume.

According to the present invention as set forth in claim 2, in addition to the effect of (1) above, there is also the effect of (2) below.

(2) When the telephone is in a talking state in response to an incoming call or in a talking state following an outgoing call, the DC loop detector detects the formation of a DC loop in the telephone office line, and the control circuit outputs the detection result of the DC loop detector. Reduce the volume of ambient sound devices based on Therefore, even when using an ambient sound device, the content of the call from the other party can be reliably heard without cumbersome manual adjustment of the volume.

[Embodiment] FIG. 1 is a circuit diagram showing a telephone according to an embodiment of the present invention,
FIG. 2 is a schematic diagram showing how the telephone is used.

In FIGS. 1 and 2, 10 is a telephone, 11 is switching equipment of a telephone office, and 12 is an audio device.

The telephone 10 is constructed as shown in FIG.
1, a connecting terminal 13 connected to L2,
It is comprised of a telephone call circuit 14 which also has a built-in calling function, and a ringer circuit 15. Note that 16 and 17 are rectifier circuits.

Further, the telephone 10 connects the ringer circuit 15 to the telephone office line L1,
A ringer circuit 15 is connected to the signal lines S1 and S2 connected to L2.
The light emitting element 18A of the photocoupler Pl is parallel to the
are connected. On the other hand, the telephone 10 includes a control circuit 1oo (in addition, a control circuit 100) built in the audio device 12, for example.
does not need to be built into the audio device 12), and control lines C1 and C2 connected to this control circuit 100
The light receiving element 18B of the photocoupler P1 is connected to this connection terminal 19. The photocoupler Pi constitutes an incoming signal detector, and the control circuit 100 controls the audio device 12 to reduce the volume of the audio device 12 on the condition that the photocoupler PL detects the arrival of an incoming signal and turns on. 12 can be controlled.

Further, the telephone 10 connects the telephone communication circuit 14 to telephone office lines L1 and L2.
A hook switch 22 and a light emitting element 22A of a photocoupler P2 are connected to the communication lines E1 and E2 connected to the communication circuit 14 in parallel with the communication circuit 14. Further, the telephone 10 connects the light receiving element 22B of the photocoupler P2 to the aforementioned connection terminal 19.
is connected to. At this time, the light receiving element 18B of the photocoupler P1 mentioned above and the light receiving element 22 of this photocoupler P2
B and are connected to the connection terminal 19 in parallel with each other.

The photocoupler P2 constitutes a DC loop detector that detects the DC loop of the telephone office lines L1 and L2 formed when the hook switch 21 is closed, and the control circuit 100 is configured such that the photocoupler P2 detects the formation of the DC loop. The audio device 12 can be controlled to reduce the volume of the audio device 12 on the condition that the audio device 12 is detected and turned on.

The hook switch 21 opens when the handset is on-hook in a standby state, and closes when the handset is off-hook in a call or conversation state.

Next, the operation of receiving a call, making a call, and ending a call by the telephone 10 will be explained.

[A] Incoming call operation (1) When receiving a call, the incoming signal (18Hz, 75v) is 1
It arrives from the exchange equipment 11 at the timing of supply for 2 seconds and stop for 2 seconds.

(2) The power of (1) above is supplied to the ringer circuit 15, and the ringing tone starts sounding.

(3) Simultaneously with (2) above, the light emitting element 18A of the photocoupler P1 is turned on, and the corresponding light receiving element 18B of the photocoupler P1 is turned on. As a result, the light receiving element 18
B becomes L level for 1 second and H level for 2 seconds.

(4) The control circuit 100 includes the light receiving element 18B of (3) above.
The level change is read, and as a result, the volume of the audio device 12 is controlled to be reduced.

The user can reliably hear the ringtone even though the volume of the audio device 12 is reduced in (4) above.

[B] Call operation (+) Next, when the user takes the handset of the telephone 10 off-hook, the hook switch 21 closes and the telephone office line L
1, a DC loop is formed in L2.

As a result, the telephone 10 is connected to the other party's telephone, the incoming signal from the exchange installation ll1l disappears, and the ringing tone output of the ringer circuit 15 is deactivated. The user can then talk to the other party using the handset.

(2) Simultaneously with (1) above, the light emitting element 22A of the photocoupler P2 is turned on, and the corresponding light receiving element 22B of the photocoupler P2 is turned on. As a result, the light receiving element 22
B is always at L level.

(3) The control circuit lOO includes the light receiving element 22B of (2) above.
As a result, the volume reduction control of the audio device 12 according to the above [A] (4) of the incoming call operation is continued.

The user can talk while reliably hearing what the other party is saying, even though the volume of the sound device M12 is reduced in (3) above.

[C] Call Ending Operation (1) Next, when the call ends and the user puts the handset of the telephone 10 on the hook, the hook switch 21 opens and the central office line L1. The L2 DC loop is opened and enters a standby state.

(2) Simultaneously with the above (1), the light emitting element 22A of the photocoupler P2 is turned off, and the corresponding light receiving element 22B of the photocoupler P2 is turned off. As a result, the light receiving element 22
B is always at H level.

(3) The control circuit 100 includes the light receiving element 22B of (2) above.
As a result, the volume of the audio device 12 is restored to the original state before the volume reduction control by the above [A] (4) for the incoming call operation and the above [B] (3) for the call operation.

In the case of the telephone 10, even when the handset is off-hook to make a call, the volume of the audio device 12 can be reduced in the same way as in the above-mentioned [B] incoming call operation.

Next, the operation of the above embodiment will be explained.

(1) When an incoming signal arrives at the telephone IO, the photocoupler P1 as an incoming signal detector detects this incoming signal, and the control circuit 100 adjusts the volume of the surrounding acoustic device 12 based on the detection result of the photocoupler P1. reduce Therefore,
Even when the ambient sound device 12 is used, the ringtone can be reliably heard without cumbersome manual adjustment of the volume.

(2) When the telephone 10 is in a talking state in response to an incoming call or in a talking state following an outgoing call, the photocoupler P2 as a DC loop detector detects the formation of a DC loop in the telephone office lines L1 and L2, and the control circuit lOO reduces the volume of the ambient sound device 12 based on the detection result of the photocoupler P2. Therefore, even when the ambient sound device 12 is in use, it is possible to reliably hear what the other party is saying without having to manually adjust the volume.

In the above embodiment, at the end of the call, the photocoupler P2 as a DC loop detector detects the opening of the DC loop, and the control circuit 100 adjusts the volume of the surrounding acoustic device based on the detection result of the photocoupler P2. Above (1)
, restore the original state before the volume reduction control in (2). Therefore, the user can ensure a good conversation without having to touch the volume control section of the audio device 12 at all.

[Effects of the Invention] As described above, according to the present invention as set forth in claim 1, it is possible to ensure that a ringtone can be heard even when an ambient sound device is used without cumbersome manual adjustment of the volume. .

Further, according to the present invention as set forth in claim 2, even when an ambient sound device is used, the ringtone can be reliably heard without cumbersome manual adjustment of the volume, and when talking, it is possible to hear the contents of the message from the other party. You can make sure that you can hear it.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram showing a telephone according to an embodiment of the present invention;
FIG. 2 is a schematic diagram showing how the telephone is used. 10...Telephone, 12...Sound device, 14...Telephone circuit. 15... Ringer circuit, 100... Control circuit, Pl... Photocoupler (incoming signal detector), P2...
・Photocoupler (DC loop detector). Patent applicant: Sekisui Chemical Co., Ltd. Representative Hiroshi1) Kaoru

Claims (2)

[Claims] (1) A telephone that is connected to a telephone office line and is configured with a talking circuit and a ringer circuit is equipped with an incoming signal detector and detects when the incoming signal detector detects the arrival of an incoming signal. 1. A telephone capable of controlling ambient sound volume, characterized in that the telephone set is additionally provided with a control circuit for reducing the volume of an ambient sound device. (2) In a telephone that is connected to a telephone office line and is configured with a calling circuit and a ringer circuit, an incoming signal detector and a DC loop detector that detects the formation of a DC loop in the telephone office line are provided. and is accompanied by a control circuit that reduces the sound volume of the ambient sound device on the condition that the incoming signal detector detects the arrival of an incoming signal or the DC loop detector detects the formation of the DC loop. A telephone that can control ambient sound volume.