JPS5862957A - Extension hand free response circuit - Google Patents
Extension hand free response circuitInfo
- Publication number
- JPS5862957A JPS5862957A JP16175581A JP16175581A JPS5862957A JP S5862957 A JPS5862957 A JP S5862957A JP 16175581 A JP16175581 A JP 16175581A JP 16175581 A JP16175581 A JP 16175581A JP S5862957 A JPS5862957 A JP S5862957A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- speaker
- microphone
- free response
- control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000004044 response Effects 0.000 title claims abstract description 12
- 230000005236 sound signal Effects 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
- 230000008878 coupling Effects 0.000 abstract description 3
- 238000010168 coupling process Methods 0.000 abstract description 3
- 238000005859 coupling reaction Methods 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 abstract 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 241001655798 Taku Species 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M9/00—Arrangements for interconnection not involving centralised switching
- H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
Abstract
Description
【発明の詳細な説明】
この発明はボタン電話装置において内線からの音声呼出
しに対し、送受器以外に’ｄ１話機に内蔵され九マイク
ロホンを通して応答する内線ハンド７リ一応答囲路Ｋｌ
ｌする。DETAILED DESCRIPTION OF THE INVENTION This invention provides a button telephone device that responds to a voice call from an extension through an extension hand (7), a response ring (Kl), which is built into the 'd1 telephone in addition to the handset, and which responds to a voice call from an extension.
I do it.
ボタン電ＦｉＩｉｉｋ＃ｔの高機能化が進展し、内線か
らの音声呼出しに対し、電話機内蔵のマイクロホンを使
用し、送受器をとらなくても、応答し通話できる機能、
即ちハンドフリ一応答が提供されている。これを実現す
るための回路として、音声スイッチ回路と、ハイブリッ
ド回路が代表的で参る。音声スイッチ−路は高性能であ
るが、回路構成が複雑で経済的に実現性が困難である。The functionality of the FiIiik#t button phone has become more advanced, with the ability to answer and talk to voice calls from extensions without having to pick up the handset, using the built-in microphone of the phone.
That is, a hands-free response is provided. Typical circuits to achieve this are audio switch circuits and hybrid circuits. Although the voice switch path has high performance, the circuit configuration is complex and it is difficult to realize it economically.
一方、ノーイブリッド回路は回路構成が簡易で経済性に
すぐれるが、ハウリング余格が小さいなどの欠点を有し
ている。On the other hand, a no-brid circuit has a simple circuit configuration and is highly economical, but has drawbacks such as a small feedback residual.
ハイブリッド回路の使用を内線通話に限定し、た場合、
ハイブリッド・バランスの不整合は比較的少いが、それ
でもマイクロホンからスピーカへＯ側ｔｔｊＩｃ′＆量
が小さく、送話音量、受話音量を十分に確保できない。If the use of the hybrid circuit is limited to internal calls,
Although the hybrid balance mismatch is relatively small, the amount of O side ttjIc'& from the microphone to the speaker is still small, making it impossible to ensure sufficient transmitting and receiving volumes.
とくにスピーカ用の増幅回路が局線の拡声受話と兼用さ
れる場合Ｅｆ１、局線かもの入力信号レベルの変動軸ｄ
＃広いため、増幅回路利得を大きくとる必要があ）、ハ
ウリングを防止するためには、マイクロホン入力の増幅
回路利得を大きくすることができず、十分な通話性能を
実現できなかった。In particular, when the amplifier circuit for the speaker is also used for loudspeaker reception of the central office line, Ef1, the axis of variation d of the input signal level of the central office line.
#Because of the wide area, it was necessary to increase the gain of the amplifier circuit), and in order to prevent howling, the gain of the amplifier circuit for the microphone input could not be increased, making it impossible to achieve sufficient speech performance.
こＯ発明は、上記の問題を解決するため拡声受話状態と
ハンドフリ一応答状態とでスピーカ増幅回路の利得を可
変にしたもので以下図面につき詳細に説明する。In order to solve the above-mentioned problem, the present invention makes the gain of the speaker amplifier circuit variable between the loudspeaker reception state and the hand-free response state, and will be described in detail below with reference to the drawings.
第１図はこの発明の一実施例を示し、主装置ＭＥＫ複数
の電話機ＫＴ（図では一つのみを示す）がそれぞれ１対
の通話線ＳＬ 、 １対の制御線ＤＬＫより星状に接続
されている。主装置ＭＥには局線ＣＯも優続されている
。電話機に〒にお諭ｙ通話回路８０の一側に送受器ＨＤ
が接続され、切替リレーＢＲＫよシ通話線ＳＬは通話回
路ＳＣの他側と結合トランス〒と切替え接続される。結
合トランスＴは通話線ＳＬの直流電流を分離し、音声信
号をハイブリッド回路ＨＹＩＩ Ｋ供給する。ハイブリ
ッド回路ＨＹＢ Ｋ減衰回路ムＴｉを介してスピーカａ
ＳＳが接続され、また！イクロホンｍ＊ｗ４／・イブリ
ッド１路ＩｆｆｌＫｍ！絖される。スピーカ回路８はス
ピーカ８Ｐおよびスピーカ増幅１路Ｓムよ１０、マイク
ロホｙａ路Ｍは！イク四ホンＭＩＣおよびマイク−ホン
増幅回路ＭＡＫより４１１威される。制御回、路ＫＣは
拡声ボタン８に、図に示さないがダイヤルボタン、局纏
、内線選択ボタン中鋼御１１ＤＬなどよりの情報に基づ
き、ボタン電話機４Ｄ６１１１１１１１をなすように操
作し、通常マイクロコンビエータが用いられる。FIG. 1 shows an embodiment of the present invention, in which a main device MEK and a plurality of telephones KT (only one is shown in the figure) are connected in a star shape by a pair of communication lines SL and a pair of control lines DLK, respectively. ing. A central office line CO is also connected to the main device ME. The handset HD is attached to one side of the telephone call circuit 80.
is connected, and the switching relay BRK and the communication line SL are switched and connected to the other side of the communication circuit SC and the coupling transformer 〒. The coupling transformer T separates the direct current of the speech line SL and supplies the voice signal to the hybrid circuit HYIIK. Speaker a via hybrid circuit HYB K damping circuit Ti
SS is connected again! Iklophone m*w4/・Ibrid 1ro IfflKm! It is threaded. The speaker circuit 8 includes a speaker 8P, a speaker amplification path S 10, and a micro-amplification path M! 411 from the Iku four-phone MIC and microphone-phone amplifier circuit MAK. The control circuit, KC, operates the loudspeaker button 8, not shown in the figure, based on information from the dial button, central station, extension selection button Nakakogo 11DL, etc., in a manner similar to that of button telephone 4D61111111. is used.
ハイブリッド回路ＨＹＩ紘過話纏８Ｌより）ランスＴを
介して入力される音声をスピーカ回路８へ供給し、マイ
クロホン回路Ｍよりの信号を通話線ｔｔＬへ供給すると
ともに、！イク四ホン回路Ｍからスピーカ回路８への前
号のまわりこみを抑制する。(from the hybrid circuit HYI Hirokata 8L) The audio input via the lance T is supplied to the speaker circuit 8, the signal from the microphone circuit M is supplied to the communication line ttL, and! The previous issue is suppressed from being transmitted from the four-phone circuit M to the speaker circuit 8.
リレー８Ｒは、常時は通話回路８ＣＩＩＫ閉じてお９、
送、受１ａＨＤによる通話を可能としている。拡声受話
は８ＲリレーはトランスＴＩＩＫ−じ、ハイブリッド回
路［Ｂと通話１１１８Ｌを接続する。Relay 8R is normally closed and communication circuit 8CIIK is closed.
Sending and receiving 1a HD calls are possible. For loudspeaker reception, the 8R relay connects the transformer TIIK and the hybrid circuit [B and call 1118L.
′拡声受話を行うＫは電話機ＫＴにおいて拡声ボタン８
Ｋを押す。これＫよ）制御回路ＫＣはリレーＳＲを駆動
し、後産をトランスｉ側に閉じるとともに、マイクロホ
ンＭＩＣとマイク四ホン増幅回路Ｍムとの関に直列に挿
入されたスイッチＭ８ ｔ−１４き、かつ減衰回路ムＴ
Ｔの減表量をゼロとする。このとき通話線ＳＬ上の音声
信号は十分な利得で増幅され、スピーカＳＰよシ放声さ
れる。'K to receive amplified sound is to press the loudspeaker button 8 on the telephone KT.
Press K. This is K) The control circuit KC drives the relay SR, closes the output to the transformer i side, and connects the switch M8 t-14 inserted in series between the microphone MIC and the microphone four-phone amplification circuit M. and attenuation circuit T
Let the amount of surface reduction of T be zero. At this time, the audio signal on the communication line SL is amplified with sufficient gain and is emitted from the speaker SP.
一方、音声呼出が生じ九場合には、主装置ＭＥより制御
線ＤＬを介して制御回路ＫＣに着信情報が伝送される。On the other hand, when a voice call occurs, incoming call information is transmitted from the main device ME to the control circuit KC via the control line DL.
これにより、制御回線ＫＣはリレーＳＲを駆動し、接点
をトランスＴＩＲＥ閉じるととも（スイッチＭＳを閉じ
：かつ減衰回路ＡＴＴＫよりスピーカ回路Ｓへの入力を
減衰させる。この結果マイクロホンＭＩＣからの信号は
マイクロホン増幅回路ＭＡで増幅され、ハイブリッド回
路ＨＹＢを通して通話線ＳＬに送出される。また、通話
線ＳＬ上の信号はハイブリッド回路ＨＹＩＩ 、減衰回
路ＡＴＴを経由してスピーカ回路ＳＫ供給され、スピー
カＳＰより放声される。As a result, the control line KC drives the relay SR, closes the contact to the transformer TIRE (closes the switch MS: and attenuates the input to the speaker circuit S from the attenuation circuit ATTK. As a result, the signal from the microphone MIC is transmitted to the microphone It is amplified by the amplifier circuit MA and sent to the telephone line SL through the hybrid circuit HYB.The signal on the telephone line SL is also supplied to the speaker circuit SK via the hybrid circuit HYII and the attenuation circuit ATT, and is emitted from the speaker SP. Ru.
ハンドフリ一応答の場合、拡声受話と比べてスピーカ系
（減衰回路ム’Ｉ”ｒｓＰよびスピーカ回路８）の利ｌ
ｅｄ減少するが、通話線ＳＬから入力される信号状内線
通話信号に限定されており、信号レベルを十分に確保で
きるので、スピーカ８Ｐよ）放声される音量の低下は少
ない。またスピーカ系の利得Ｏ減少と対応して、マイク
騨ホン回路ｙの利得を大きくできるので、通話線ＢＬへ
の送話レベルを大きくでき通話性能の向上が図れる。In the case of hand-free response, the benefit of the speaker system (attenuation circuit M'I"rsP and speaker circuit 8) is lower than that of loudspeaker reception.
ed decreases, but it is limited to the signal-like extension call signal input from the call line SL, and a sufficient signal level can be ensured, so there is little reduction in the volume of the voice emitted (from the speaker 8P). In addition, since the gain of the microphone/phone circuit y can be increased in accordance with the decrease in the gain O of the speaker system, the level of speech transmitted to the communication line BL can be increased and the communication performance can be improved.
制御回路ＫＣをマイクロコンピュータを内蔵して構成す
ることによ）、前述のような減衰回路ムＴＴ。By configuring the control circuit KC with a built-in microcomputer, the attenuation circuit TT as described above can be obtained.
スイッチＭＳの制御はその時の各種情報によシ各種状態
を判定して、予め決められた状態にすることは容易に達
成される。Control of the switch MS can be easily achieved by determining various states based on various information at the time and setting the switch MS to a predetermined state.
以上説明したようにこの発明のハンドフリ一応答回路に
よれば簡易１回路構成によって、局線の拡声受話と内線
ハンドフリ一応答との機能を実現し、それぞれに対し適
度の受話音量を確保し、かつ後者の場合に十分な送話レ
ベルを確保することができる。As explained above, according to the hands-free response circuit of the present invention, it is possible to realize the functions of loudspeaker reception of the central office line and extension hands-free response with a simple single circuit configuration, to secure appropriate reception volume for each, and to In the latter case, a sufficient transmitting level can be ensured.
図はこの発明による内線ハンドフリ一応答回路の一実施
例を示すブロック図である。
ＭＥ：主装置、ＫＴ：電話機、ＣＯ：局線、ＳＬ＝通話
線、ＤＬ＝制御線、ＳＲ：切替リレー、ＳＣ：通話回路
、ＨＹＩＩ ：ハイブリッド回路、ムＴＴ：減衰回路、
Ｓ：スピーカ回路、Ｍ：マイタ回路、ＫＣ：制御回路、
ＳＫ：拡声ボタン。
特許出願人 日本電信電話公社
代理人 軍費 卓FIG. 1 is a block diagram showing an embodiment of an extension hand-free response circuit according to the present invention. ME: Main equipment, KT: Telephone, CO: Office line, SL=Speech line, DL=Control line, SR: Switching relay, SC: Speech circuit, HYII: Hybrid circuit, MUTT: Attenuation circuit,
S: speaker circuit, M: miter circuit, KC: control circuit,
SK: Loudspeaker button. Patent applicant Nippon Telegraph and Telephone Public Corporation agent Military expenses Taku
Claims (1)
された音声信号を前記スピーカ回路に供、給し、前記マ
イクロホン回踏より入力され水音声信号を前記通話線に
供給しかつ、前記マイクロホン回―から前、記スピーカ
回路へのまわシ込み信号を抑制するハイブリッド回路と
を有し、内層からの前記スビーｐ＠路を通じる音声呼出
に対して前記マイターホン回路を通して応答するノ〜ン
ド７リ一応答状態と、局線からの通話信号を前記スピー
カ回路を通して聴取する拡声受話状態とをとることがで
きるボタン電話機において、前記Ｉ・イブリッド回路及
び前記スピーカ回路間に挿入された減衰回路と、前記ノ
・ンド７り一応答状態で前記減衰回路の滅衷量を前記拡
声受話状態よりも大に制伸する手段とを具備する内線ノ
ーンドフリ一応答回路。A speaker circuit, a Microhoff circuit, and a microphone circuit for supplying an audio signal inputted from the communication line to the speaker circuit, supplying a water audio signal input from the microphone circuit to the communication line, and supplying the audio signal input from the microphone circuit to the communication line; - a hybrid circuit for suppressing interference signals from the speaker circuit to the speaker circuit; A button telephone capable of taking a response state and a loudspeaker receiving state in which a call signal from a central office line is heard through the speaker circuit, comprising: an attenuation circuit inserted between the I/ibrid circuit and the speaker circuit; - means for reducing the amount of attenuation of the attenuation circuit in the extension call response state to a greater extent than in the amplified voice receiving state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16175581A JPS5862957A (en) | 1981-10-09 | 1981-10-09 | Extension hand free response circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16175581A JPS5862957A (en) | 1981-10-09 | 1981-10-09 | Extension hand free response circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5862957A true JPS5862957A (en) | 1983-04-14 |
Family
ID=15741267
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16175581A Pending JPS5862957A (en) | 1981-10-09 | 1981-10-09 | Extension hand free response circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5862957A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61101153A (en) * | 1984-10-24 | 1986-05-20 | Matsushita Electric Ind Co Ltd | Key telephone set |
| US4790006A (en) * | 1986-03-21 | 1988-12-06 | Siemens Aktiengesellschaft | Method for electrically simulating a cradle switch and a hands free talking-loudspeaking key in a hands free talking-loudspeaking telephone station |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55140352A (en) * | 1979-04-20 | 1980-11-01 | Iwatsu Electric Co Ltd | Speaker telephone set connecting system |
-
1981
- 1981-10-09 JP JP16175581A patent/JPS5862957A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55140352A (en) * | 1979-04-20 | 1980-11-01 | Iwatsu Electric Co Ltd | Speaker telephone set connecting system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61101153A (en) * | 1984-10-24 | 1986-05-20 | Matsushita Electric Ind Co Ltd | Key telephone set |
| JPH0560293B2 (en) * | 1984-10-24 | 1993-09-02 | Matsushita Electric Ind Co Ltd | |
| US4790006A (en) * | 1986-03-21 | 1988-12-06 | Siemens Aktiengesellschaft | Method for electrically simulating a cradle switch and a hands free talking-loudspeaking key in a hands free talking-loudspeaking telephone station |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1065072A (en) | Loudspeaking teleconferencing circuit | |
| JPH0591584A (en) | Earphone | |
| US4346261A (en) | Speaker phones | |
| WO2002043261A2 (en) | A portable communication device and a method for conference calls | |
| JPS5862957A (en) | Extension hand free response circuit | |
| US4493950A (en) | Loudspeaker telephone | |
| US2269565A (en) | Communication system | |
| JP3654186B2 (en) | Wireless intercom system | |
| JPH0344149A (en) | Hand-free telephone set | |
| JP2804114B2 (en) | Key telephone equipment | |
| US3439121A (en) | Multiple channel loud-speaking telephone | |
| JPS60116268A (en) | Conference telephone set | |
| JPH066285A (en) | Portable telephone set | |
| JPS6085664A (en) | Conference telephone set | |
| JPH01128647A (en) | Hand-free telephone system | |
| JPS61212151A (en) | Telephone set provided with hand-free function | |
| JPH0290886A (en) | External apparatus interface circuit for key telephone set | |
| JPH0225195A (en) | Key telephone system | |
| JPS622756A (en) | Controller for talking sound volume | |
| JPS612469A (en) | Conference telephone system | |
| GB2218302A (en) | Hands-free telephone | |
| JPS62154839A (en) | Conference telephone equipment | |
| JPS60112391A (en) | Key telephone system | |
| JPS6167356A (en) | Loudspeaker telephone set | |
| JPS60239132A (en) | Voice communication repeater |