JP2001094633A - Business phone - Google Patents

Abstract

PROBLEM TO BE SOLVED: To always make constant a ringing tone volume of a business phone which can obtain a prescribed ringing tone volume without being affected by a characteristics of its speaker and by an installed environment. SOLUTION: A microphone 7 picks up a ring tone sounded from the speaker 5 and an output of a microphone amplifier 6 is fed back to a speaker amplifier 11. The speaker amplifier 11 drives the speaker 5 so that a tone level of the ring tone is constant on the basis of an output of the microphone amplifier 6. A microcomputer 13 informs the speaker amplifier 11 about the presence of control of the tone volume level.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a business phone having a speaker and generating a ring tone, and more particularly to a business phone capable of maintaining a constant ring volume when a call is received.

[0002]

2. Description of the Related Art FIG. 3 is a block diagram showing a configuration of a conventional business phone. In FIG. 3, reference numeral 1 denotes an I / F with the main device.
2, a codec for D / A conversion of a PCM signal ring tone, 3 a speech network, 4 a speaker amplifier, 5 a speaker, 6 a built-in microphone amplifier, 7 a built-in microphone, 8 a microcomputer for controlling a business phone , 9 are business phones, and 10 is a main device having a built-in incoming sound source.

Next, the operation of the above conventional example will be described.
When an incoming call arrives at the business phone 9, a command for notifying the microcomputer 8 of the incoming call is sent through the main device 10, and a ring tone of the PCM is sent to the business phone 9. The ring tone converted to PCM is converted to an analog signal by the codec 2, and the speech network 3,
A ring tone is generated from the speaker 5 via the speaker amplifier 4.

[0004]

However, in the above-mentioned conventional system, the ring volume emitted from the speaker 5 can be kept constant due to the variation in the acoustic characteristics and quality of the speaker 5 and the environment of the room in which the business phone 9 is installed. Did not. For this reason, for example, it may not be possible to notify the ring tone from the speaker 5 at a sufficient volume.

An object of the present invention is to solve such a problem, and an object of the present invention is to provide a business phone capable of obtaining a constant ring volume without being affected by the characteristics of a speaker or an installation environment.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a speaker that emits a ring tone, a microphone that collects a ring tone emitted from the speaker, and amplifies the ring tone collected by the microphone. A microphone amplifier, a speaker amplifier that drives a speaker so that the volume level of the ring tone is constant based on the output of the microphone amplifier, and a control unit that sends the presence or absence of control of the volume level by the speaker amplifier. According to such a configuration, the ringtone emitted from the speaker is collected by the microphone and amplified by the microphone amplifier. The speaker amplifier drives the speaker based on the output of the microphone amplifier so that the volume level of the ring tone becomes constant. The control section sends out the presence / absence of the ringtone control.

Also, the present invention provides a speaker that emits a ring tone, a speaker amplifier that drives the speaker by a reception signal input via a speech network, a microphone that collects a ring tone emitted from the speaker, and a microphone. A microphone amplifier that amplifies the collected ringtone, a codec that controls output to the speech network so that the volume level of the ringtone is constant based on the output of the microphone amplifier, and whether or not the codec controls the volume level. It has a control unit for sending. According to such a configuration, the ringtone emitted from the speaker is collected by the microphone and amplified by the microphone amplifier. The codec controls the output to the speech network so that the volume level of the ring tone becomes constant based on the output of the microphone amplifier.

Therefore, according to the present invention, the incoming call volume can be kept constant irrespective of the variation of the speaker and the setting environment of the business phone.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a business phone according to an embodiment of the present invention. The same reference numerals are used for the description when they correspond to the prior art.

(Embodiment 1) FIG. 1 is a block diagram showing a first embodiment of the present invention. In FIG. 1, a connection with a main device is connected via an I / F unit 1. Codec 2
Performs A / D conversion of a ring tone by PCM. 3 is a speech network. The speaker 5 emits a ringtone. The built-in microphone amplifier 6 amplifies the ring tone collected by the built-in microphone 7. The speaker amplifier 11 varies the output level to the speaker 5 according to the output of the built-in microphone amplifier 6. The microcomputer 13 controls the operation of each part of the business phone, and controls the speaker amplifier 11 to switch between enabling and disabling gain control (variable ringtone volume). In addition, 9 is a business phone, and 10 is a main device having a built-in incoming sound source.

Next, the operation of the above configuration will be described.
When the microcomputer 13 is set to enable the gain control, a ringtone is generated from the speaker 5 when the business phone 9 receives a call. The ring tone generated from the speaker 5 at the time of the incoming call is collected by the built-in microphone 7. Then, the output of the built-in microphone amplifier 6 is fed back to the speaker amplifier 11. The speaker amplifier 11 determines the output level of the built-in microphone amplifier 6 based on the control signal of the microcomputer 13, adjusts the output level of the speaker amplifier 11, and controls the volume of the incoming call from the speaker 5 to be kept constant.

By feeding back the output of the built-in microphone amplifier 6 to the speaker amplifier 11 as described above, the incoming call volume output from the speaker 5 can be kept constant.
Thereby, the variation of the speaker 5 and the business phone 9
It is possible to eliminate variations in the incoming call volume due to the environment of the room where the is installed.

(Second Embodiment) Next, FIG. 2 is a block diagram showing a second embodiment of the present invention.

In FIG. 2, reference numeral 1 denotes an I / F unit with a main unit;
Reference numeral 2 denotes a codec for A / D-converting a ring tone sent by the PCM, 3 denotes a speech network, 4 denotes a speaker amplifier, 5 denotes a speaker, 6 denotes a built-in microphone amplifier, 7 denotes a built-in microphone, 13 denotes a microcomputer for controlling a business phone, and 12 Is the speech network 3 by the output of the built-in microphone amplifier.
Codec that can change the output level to
Is a business phone, and 10 is a main device having a built-in incoming sound source. The microcomputer 13 controls the codec 12 to enable / disable the gain control (variable ring volume).

Next, the operation of the second embodiment will be described. When a call arrives at business phone 9, speaker 5
Generates a ringtone. The ringtone at this time is the built-in microphone 7
, And the output of the built-in microphone amplifier 6 is fed back to the codec 12. The codec 12 determines the output level of the built-in microphone amplifier 6 based on the control signal of the microcomputer 13 and controls the output level of the speech network 3 so as to keep the volume of the incoming call from the speaker 5 constant.

As described above, also in the configuration of the second embodiment, the output of the built-in microphone amplifier 6 is fed back to the codec 12, so that the incoming call volume output from the speaker 5 is kept constant as in the first embodiment. Can be kept.

[0017]

The present invention has the following effects as apparent from the above embodiment.

The volume of the incoming call from the loudspeaker can be collected by the built-in microphone and fed back to keep the input signal level to the loudspeaker constant. The ring volume can be secured.

Further, according to the present invention, the speaker amplifier drives the speaker so that the volume level of the ring tone is constant based on the output of the microphone amplifier, and the codec controls the volume of the ring tone based on the output of the microphone amplifier. By controlling the output to the speech network so that the level is constant, the volume of the incoming call from the speaker can be constant.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a first embodiment of a business phone according to the present invention.

FIG. 2 is a block diagram showing a second embodiment of the business phone according to the present invention;

FIG. 3 is a block diagram showing a configuration of a conventional business phone.

[Explanation of symbols]

 1 1 / F section 2, 12 codec 3 speech network 4, 11 speaker amplifier 5 speaker 6 built-in microphone amplifier 7 built-in microphone 8, 13 microcomputer 9 business phone 10 main unit

Claims (2)

[Claims] 1. A speaker that emits a ring tone, a microphone that collects the ring tone emitted from the speaker, a microphone amplifier that amplifies the ring tone collected by the microphone, and a volume of the ring tone based on the output of the microphone amplifier. A business phone, comprising: a speaker amplifier that drives a speaker so that a level is constant; and a control unit that sends whether or not the volume level is controlled by the speaker amplifier. 2. A speaker that emits a ring tone, a speaker amplifier that drives the speaker based on a reception signal input via a speech network, a microphone that collects a ring tone emitted from the speaker, and a microphone that is collected by the microphone. A microphone amplifier for amplifying the ringtone, a codec for controlling the output to the speech network so that the volume level of the ringtone is constant based on the output of the microphone amplifier, and a control unit for transmitting whether or not the volume level is controlled by the codec. Business phone characterized by having.