JPS60112391A - Key telephone system - Google Patents

Key telephone system

Info

Publication number
JPS60112391A
JPS60112391A JP58219989A JP21998983A JPS60112391A JP S60112391 A JPS60112391 A JP S60112391A JP 58219989 A JP58219989 A JP 58219989A JP 21998983 A JP21998983 A JP 21998983A JP S60112391 A JPS60112391 A JP S60112391A
Authority
JP
Japan
Prior art keywords
circuit
telephone
speaker
extension
controls
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
Application number
JP58219989A
Other languages
Japanese (ja)
Inventor
Tatsuya Kato
加登　達也
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP58219989A priority Critical patent/JPS60112391A/en
Publication of JPS60112391A publication Critical patent/JPS60112391A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/002—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems
    • H04M9/005—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems with subscriber controlled access to an exchange line

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)

Abstract

PURPOSE:To obtain a key telephone system which allows sufficient volume during monitoring a trunk line by providing a circuit which controls reduction in gain of a speaker amplifier during extension hands free answer back. CONSTITUTION:For monitoring a trunk line, a main unit cotrol circuit 31 transfres trunk line monitor information to a telephone set control circuit 39 through a data transmission line 35, and the circuit 39 controls so as to attain a loss insertion circuit 42 to a non-loss condition. On the other hand, when extension sound call is made from a telephone set 302 to a telephone set 301 and extension hands free answer back is made by the telephone set 301, the circuit 31 transmits the extension hands free answer back information to the circuit 39 of the telephone set 301 through the circuit 35, and the circuit 39 controls to insert loss into the circuit 42, and controls to actuate a speaker amplifier 43 and microphone amplifier 45.

Description

【発明の詳細な説明】 本発明は、モニグー機能とバンズ・フリー・アン丈−・
バック機能とを有するボタン電話装置に関する。[Detailed Description of the Invention] The present invention has a moni-goo function and buns free unlength.
The present invention relates to a button telephone device having a back function.

従来この種のボタ／電話装置の電話機回路を第１図に示
す。局線通話のモニタ一時も、内線バンズ・７リー・ア
ンサ一時も、スピーカ・アンプ１２．２１の利得が一定
であり、Ｃの利得は、スピーカ１３．２２−空間−マイ
ク１５．２４−マイク・アンプ１４．２３−ハイブリッ
ド回路１１゜２０−スピーカ・アンプ１２．２１−スピ
ーカ１３．２２のループでのハウリングを発生しない限
度におδえられていた。そのため、一般に低レベルの音
声を受ける局線モニターにおいてはスピーカ・アンプ１
２．２１の利得が足りないため。A telephone circuit of a conventional button/telephone device of this type is shown in FIG. The gain of the speaker amplifier 12.21 is constant both during the monitoring of the central office line call and during the extension phone call answering. δ was kept within a limit that would not cause howling in the amplifier 14.23-hybrid circuit 11°20-speaker amplifier 12.21-speaker 13.22 loop. Therefore, speaker amplifier 1 is generally used for station line monitors that receive low-level audio.
Because the gain of 2.21 is insufficient.

音量不足をまねいていた。なお％　ｌは主装置制御回路
、２は通話路スイッチ、３は局線回路、４は局線、５．
７はデータ伝送路、６．８は通話路、９．１８は電話機
制御回路、１０．１９はフック会スイッチ、１６．２５
は通話回路、１７．２６は送受器である。This was causing a lack of volume. Note that %l is the main device control circuit, 2 is the communication path switch, 3 is the office line circuit, 4 is the office line, and 5.
7 is a data transmission path, 6.8 is a speech path, 9.18 is a telephone control circuit, 10.19 is a hook switch, 16.25
is a communication circuit, and 17.26 is a handset.

本発明の目的は、上記欠点を解決し、局線モニタ一時も
充分な背量を得られるボタ／電話装置を提供することに
ある。SUMMARY OF THE INVENTION It is an object of the present invention to provide a button/telephone device which solves the above-mentioned drawbacks and which provides sufficient backing capacity even for monitoring central office lines.

本発明は、少なくとも一本の局線と複数の電話機を収容
し、主装置と各電話機との間を、各１対の通話対と１対
以上のデータ伝送対とて接続され。The present invention accommodates at least one central office line and a plurality of telephones, and connects the main device and each telephone by one pair of voice communication pairs and one or more pairs of data transmission pairs.

電話機内で該通話対を二線四線変換回路（ハイブリッド
回路ンの二線側に収容し、スピーカ・アンプ及びマイク
・アンプを四線側に接続したボタン電話装置におりて、
内線バンズ・７リー・アンサー−バック時、該スピーカ
・アンプの利得全滅する制御を行う回路金有することを
特徴としたボタン電話装置である。Inside the telephone, the call pair is housed in the two-wire side of a two-wire/four-wire conversion circuit (hybrid circuit), and the speaker amplifier and microphone amplifier are connected to the four-wire side.
This button telephone device is characterized by having a circuit for controlling the gain of the speaker amplifier to be completely destroyed when the extension phone is answered back.

次に本発明の実施例について図面を参照して説明する。Next, embodiments of the present invention will be described with reference to the drawings.

第２図は本発明の一実施例であり、主装置ｌｏｌは通話
路スイッチ３２．局線回路３３及びデータ伝送路３６．
　３ｓｔ−弁じて電話機２０１，２０２’を制御する主
装置制御回路３１と、局線３４と通話路スイッチ３２と
の間の通話接続制御全行う局線回路３３と、局線と電話
機及び電話機相互間の通電詰機２０１，２０２はデータ
伝送路３５．３７金ブｒして、損失挿入回路４２，５２
．スピーカ・アンプ４３．’５３．マイク・アンプ４５
．５５を制御する電話機制御回路３９．４９と、主装置
の通話路スイッチ３２からの通話ｗ５３６．３８をオン
・フック時はハイブリッド回路４１．５１に接続し、オ
フ・フック時は通話回路４７．５７に接続する７ツクー
スイツテ４０．５０と、７ツク・スイッチ４０．５０か
らの音声信号を損失挿入回路４２．５２を弁してスピー
カーアンプｊ３．５３に送Ｖ、マイク・アンプ４７．５
７からの音声信号をスピーカ・アンプ４３．５３側に極
力漏れない様にして７ツク・スイッチ４０．５０ｅ介し
て通話路３６．３８に送るハイブリッド回路４１゜５１
と、ハイブリッド回路４１．５１からの信号を電話機制
御し路３９，４９の制御で損失させる損失挿入回路４２
．５２と、この出力を増幅するスピーカーアンプ４３．
５３と、この信号を音声に変換するスピーカ４４．５４
と、音声を電気信号に変換するマイク４６．５６と、こ
の信号を増幅してハイブリッド回路４１．５１に送るマ
イク−アンプ４５．５５と、７ツクースイツチ４０゜５
０會ブしして接続される通話回路４７．５７と。FIG. 2 shows an embodiment of the present invention, in which the main device lol is a communication path switch 32. Office line circuit 33 and data transmission line 36.
3st - A main device control circuit 31 that controls the telephones 201 and 202' as a valve; a central office line circuit 33 that performs all call connection control between the central office line 34 and the telephone line switch 32; The energizing machines 201 and 202 connect data transmission lines 35 and 37, and loss insertion circuits 42 and 52.
．． Speaker amplifier 43. '53. microphone amp 45
．． When on-hook, the telephone control circuit 39.49 that controls the telephone control circuit 55 and the telephone call w536.38 from the telephone path switch 32 of the main unit are connected to the hybrid circuit 41.51, and when off-hook, the telephone control circuit 39.49 is connected to the telephone circuit 47.57. The audio signal from the 7-tub switch 40.50 connected to the 7-tub switch 40.50 is sent to the speaker amplifier J3.53 through the loss insertion circuit 42.52, and the microphone amplifier 47.5.
A hybrid circuit 41゜51 that sends the audio signal from 7 to the communication path 36.38 via the 7-switch switch 40.50e while preventing it from leaking to the speaker amplifier 43.53 side as much as possible.
and a loss insertion circuit 42 which controls the telephone and causes the signal from the hybrid circuit 41 and 51 to be lost by controlling the lines 39 and 49.
．． 52, and a speaker amplifier 43 that amplifies this output.
53 and a speaker 44.54 that converts this signal into audio.
, a microphone 46.56 that converts audio into an electrical signal, a microphone-amplifier 45.55 that amplifies this signal and sends it to a hybrid circuit 41.51, and a 7-way switch 40°5.
The communication circuit 47.57 is connected to the telephone line 47.57.

この通話回ｖ！＆４７．５７と一体で通話を行う送受器
４８．５８とによりＷ！成される。This call episode v! W! will be accomplished.

次に実施例の動作について説明する。まず局線モニタ一
時について説明する。この場合、局線３４からの音声信
号は局線３４−局線回路３３−通話路スイッチ３２の接
点ｅ−通話ｗｒ３６−７ツク・スイッチ４０−ハイブリ
ッド４１−損失挿入回路４２−スピーカ中アンプ４３−
スピーカ４４のループで回路は落成され、スピーカ４４
より音声が出力される。この場合主装置制御回路３１は
テーク伝送路３５ｆｔ介して電話機制御回路３９に局線
モニター情報を送り、電話機制御回路３９は損失挿入回
路４２に無損失状態になる様制御し。Next, the operation of the embodiment will be explained. First, the temporary central office line monitor will be explained. In this case, the audio signal from the office line 34 is transmitted from the office line 34 - the office line circuit 33 - the contact e of the communication path switch 32 - the communication line wr 36 - the 7-switch switch 40 - the hybrid 41 - the loss insertion circuit 42 - the speaker amplifier 43 -
The circuit is completed with a loop of speaker 44, and speaker 44
More sound is output. In this case, the main device control circuit 31 sends office line monitor information to the telephone control circuit 39 via the take transmission line 35ft, and the telephone control circuit 39 controls the loss insertion circuit 42 to be in a lossless state.

かつスピーカ・アンプ４３を動作する様制御する。It also controls the operation of the speaker amplifier 43.

この時の局線の信号レベルｋ　ＶＣＯ＜ＣＩＢ）とし、
ハイブリッド回路４１での損失ｋ　ＬＨＢ（ｄＢ）とし
、スピーカ自アンプ４３の増幅度ｋ　Ａｓ　（ｄＢ）と
すると、スピーカ４４に加えられる信号レベルはｖｃ、
ＩＪｍ　＋ＡｓθＢ）となる。局線回路３３５通話通話
路スイッチ。The signal level of the office line at this time is k VCO<CIB),
Assuming that the loss in the hybrid circuit 41 is k LHB (dB) and the amplification degree of the speaker's own amplifier 43 is k As (dB), the signal level applied to the speaker 44 is vc,
IJm +AsθB). Office line circuit 335 call line switch.

通話路３６の損失は一般１ｃ　Ｏ（ｄＢ）もしくは、は
ぼ０　（ｄＢ）に等しい。The loss in the communication path 36 is typically equal to 1cO (dB) or approximately 0 (dB).

一方電話機３０２から電話機３０１へ内線音声呼出金行
い、電話機３０１で内線バンズ・７り−・アンサ−ｅバ
ックをした場合、オフ・ノックした電話機３０２の送受
器５８に加えられた音声は、送受器５８−通話回路５７
−フック・スイッチ５〇−通話路３８−通話路スイッチ
３２の接点り一通話路スイッチ３２の接点ｇ−通話路３
６−７ツク・スイッチ４０−ハイブリッド回路４１−損
失挿入回路４２−スピーカ・アンプ４３−スピーカ４４
のループでスピーカ４４よシ斤声が出力される。この場
合、主装置制御回路３１はデータ伝送路３５を弁して電
話機３０１Ｃ）電話機制御回路３９に内線バンズ・７　
リ＋　１１アンサ−自バック情報を送り、電話機制御回
路３９は損失挿入回路４２に損失を挿入する様制御し、
かつ、スピーカ・アンプ４３とマイクｅア／ブ４５を動
作する様制御する。この時の電話機３０２の通話回路５
７から出力される信号レベルｋ　Ｖｘｃ＆Ｉ（ｄｌｌ）
とし、損失挿入回路４２での損失をしＡＴＴ　（ｄＢ）
とすると、スピーカ４４に加えられる信号レベルはＴｈ
　ｖｒｃＭ　”ＨＡ−ＬＡＴ丁十Ａ８（ｄｌｌ）となる
。On the other hand, when an extension voice call is made from the telephone 302 to the telephone 301, and an extension bang/7ri/answer e-back is made from the telephone 301, the voice added to the handset 58 of the telephone 302 that knocked off/knocks is transmitted to the handset. 58-Telephone circuit 57
- Hook switch 50 - Communication path 38 - Contact point of communication path switch 32 - Contact g of communication path switch 32 - Communication path 3
6-7 switch 40 - hybrid circuit 41 - loss insertion circuit 42 - speaker amplifier 43 - speaker 44
A loud voice is output from the speaker 44 in the loop. In this case, the main device control circuit 31 valves the data transmission path 35 and connects the telephone 301C) to the telephone control circuit 39 with extension 7.
The telephone control circuit 39 controls the loss insertion circuit 42 to insert a loss,
It also controls the operation of the speaker amplifier 43 and microphone e-amp 45. Call circuit 5 of telephone 302 at this time
Signal level k output from 7 Vxc & I (dll)
Then, the loss in the loss insertion circuit 42 is ATT (dB)
Then, the signal level applied to the speaker 44 is Th
vrcM ”HA-LAT DingjuA8 (dll).

また内線バンズ・７り一〇アンサー拳バックの場合にお
いては、スピーカ４４からＱ片響信号がマイク４６に回
ジ色み、スピーカ４４−空間−マイク４６−マイク・ア
ンプ４５−ハイブリッド回路４１−損失挿入回路４２−
スピーカ・アンプ４３−スピーカ４４のループができ、
ハウリング防止のためこのループでの利得Ｔｈ　ＯｄＢ
以下にする。In addition, in the case of extension vans and 7-ri-10-answer-fist back, the Q monophonic signal from the speaker 44 is transmitted to the microphone 46, and the speaker 44 - space - microphone 46 - microphone amplifier 45 - hybrid circuit 41 - loss. Insertion circuit 42-
A loop of speaker amplifier 43-speaker 44 is created,
Gain Th OdB in this loop to prevent howling
Do the following.

ｖｃｏとＶＩＣＭ　のレベル差にほぼ等しい損失全損失
挿入回路４２１Ｃよシ、内線バ／ズ・７り一拳アンサー
拳バック時に挿入し２反面、スピーカ・アンプ４３の利
得を従来のものに比べｖｃｏとｖ’ｔｃＭのレベル差分
だけ上げることにより、従来と同等の内線バンズ１１７
リー・アン丈−−バック時の性能を確保し、かつ局線モ
ニタ一時は損失挿入回路４２の損失ｔ　ＯｄＢとし、従
来に比ベスピーカ・アンプ４３の利得を上げられる。The total loss insertion circuit 421C has a loss that is almost equal to the level difference between VCO and VICM, and is inserted when the extension B/Z is back. By increasing the level difference of v'tcM, the extension band 117 is the same as before.
Lee Ann Length--The performance during backup is ensured, and the loss insertion circuit 42 has a loss t OdB during station line monitoring, and the gain of the speaker amplifier 43 can be increased compared to the conventional system.

言い換えると１局線モニタ一時のスピーカ４４人力信号
ＶヘルＶａｃｏ　ｔｉＶｓｃｏ”Ｖｃｏ　ＬＩＨＲ＋Ａ
１１　（！：なジ、内線バンズ・７リー・アン丈−Ｑバ
ック時のスピーカ４４人力信号レベルｖ８□ＣＭは、　
Ｖ８Ｘ（Ｍ＝　ｖｌＣＭ　ＩＪＨＢ　ＬＡＴＴ　＋　Ａ
８　トナｂ　ｏ　ＶｃｏはｖｘｃＭよシレベルが小さく
ｂＬｒｈｔ丁　はその差分を内線バンズ・フリー・アン
サ−・バック時挿入する損失テｕｂ　ｔ）　、Ｙｃｏ　
：ＶＩＣＭ−ＬＡＴＴ　テ；ｈ　り　、　Ｖｃｏ　＝Ｖ
ｓｃｙ−ｔＡｒｔ　でｔｂ９．　Ｖｓｃｏ＝（ＶｓｃＭ
−ＬＡＴＴ）　Ｌｍ＋Ａ８　となり、局線モニタ一時も
内線バンズ・７リー・アンサ−・バック時と同等の音量
が得られる。In other words, 1 station line monitor temporary speaker 44 human power signal V health Vaco tiVsco"Vco LIHR+A
11 (!: Naji, Extension Vans 7 Lee Ann Length - Speaker 44 human power signal level v8 CM at Q back is,
V8X (M= vlCM IJHB LATT + A
8 Tona b o Vco has a smaller signal level than vxcM, and bLrht d is the loss value inserted at the time of extension band free answer back.
:VICM-LATT te;hri, Vco=V
tb9.scy-tArt. Vsco=(VscM
-LATT) Lm+A8, and the same volume level can be obtained even when monitoring the central office line as when using the extension band, 7-lead, answer, and back.

不発ＥＩＩＩＩＣは以上説明したように、局線モニタ一
時の音量を充分大きくできる効果がある。As explained above, the unfired EIIIC has the effect of making the volume of the station line monitor sufficiently large.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は従来例を示すブロック図、第２図は本発明の一
実施例を示すブロック図である。 １．３１・・・・・・主装置制御回路、２，３２・・・
・・・通話路スイッチ、３．３３・・・・・・局線回路
、４．３４・・・・・・局線、５，７，３５．３７・・
・・・・データ伝送路。 ６、　８．　３６．　３８・・・・・・通話路、９．　
１８．　３９゜４９・・・・・・電話機制御回路、１０
．　１９．　４０゜５０・・・・・・７ツク・スイッチ
、１１，２０，４１゜５１・・・・・・ハイブリッド回
Ｒ，１２，２ｔ、４３゜５３・・・・・・スピーカ・ア
ンプ、１３．　２２．　４４゜５４・・・・・・スピー
カ、１４．２３，４５．５５・・・・・・マイク拳アン
プ、１５．　２４．　４６．　５６・・・・−・マイク
、１６，２５，４７．５７・・・・・・通話回路。 １７．２６，４８．５８・・・・・・送受器、４２．５
２・・・・・・損失挿入回路。FIG. 1 is a block diagram showing a conventional example, and FIG. 2 is a block diagram showing an embodiment of the present invention. 1.31... Main device control circuit, 2,32...
...Call path switch, 3.33... Office line circuit, 4.34... Office line, 5, 7, 35.37...
...Data transmission path. 6, 8. 36. 38...Call path, 9.
18. 39°49...Telephone control circuit, 10
．． 19. 40°50...7 switch, 11,20,41°51...hybrid circuit R, 12,2t, 43°53...speaker amplifier, 13. 22. 44゜54... Speaker, 14.23, 45.55... Microphone fist amplifier, 15. 24. 46. 56...---Microphone, 16, 25, 47.57...Telephone circuit. 17.26, 48.58...Transmitter, 42.5
2...Loss insertion circuit.

Claims (1)

【特許請求の範囲】[Claims] 少なくとも一本の局線と複数の電話機を収容し、主装置
と前記電話機との間を各１対の通話対と１対以上のデー
タ伝送対とで接続し、電話機内で前記通話対全二線四線
変換回路の二線側に収容し、スピーカ・アンプ及びマイ
ク・アンプとを四線側に接続し、局線モニター機能と内
線バンズ・フリー・アンサ−・バック機能を有するボタ
ン電話装置において、内線バンズ・７リー・アンサ−・
バック時に前記スピーカ・アンプＱ人カレベルレベ衰さ
せる制御を行うことを特徴とするボタン電話装置。At least one central office line and a plurality of telephones are accommodated, and the main device and the telephones are connected by one pair of communication pairs and one or more pairs of data transmission pairs, and all the communication pairs are connected within the telephone. In a button telephone device housed on the two-wire side of a four-wire conversion circuit, with a speaker amplifier and a microphone amplifier connected to the four-wire side, and having a central office line monitoring function and an extension band free answer back function. , Extension Vans 7 Lee Answer
A button telephone device characterized in that control is performed to attenuate the speaker amplifier Q level when backing up.
JP58219989A 1983-11-22 1983-11-22 Key telephone system Pending JPS60112391A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP58219989A JPS60112391A (en) 1983-11-22 1983-11-22 Key telephone system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58219989A JPS60112391A (en) 1983-11-22 1983-11-22 Key telephone system

Publications (1)

Publication Number Publication Date
JPS60112391A true JPS60112391A (en) 1985-06-18

Family

ID=16744177

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58219989A Pending JPS60112391A (en) 1983-11-22 1983-11-22 Key telephone system

Country Status (1)

Country Link
JP (1) JPS60112391A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0399596A (en) * 1989-09-12 1991-04-24 Toshiba Corp Key telephone system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0399596A (en) * 1989-09-12 1991-04-24 Toshiba Corp Key telephone system

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