JPS62180621A - Push-button telephone system - Google Patents

Push-button telephone system

Info

Publication number
JPS62180621A
JPS62180621A JP2312986A JP2312986A JPS62180621A JP S62180621 A JPS62180621 A JP S62180621A JP 2312986 A JP2312986 A JP 2312986A JP 2312986 A JP2312986 A JP 2312986A JP S62180621 A JPS62180621 A JP S62180621A
Authority
JP
Japan
Prior art keywords
test signal
wire
level
circuit
telephone line
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
JP2312986A
Other languages
Japanese (ja)
Inventor
Yoshihito Imura
義仁 井村
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
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 filed Critical NEC Corp
Priority to JP2312986A priority Critical patent/JPS62180621A/en
Publication of JPS62180621A publication Critical patent/JPS62180621A/en
Pending legal-status Critical Current

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Landscapes

  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)

Abstract

PURPOSE:To automatically prevent the increase in the side tone and the decrease in the calling level caused due to the unbalance with a telephone line even when the tilted set is connected to a telephone line whose characteristic impedance differs largely by providing a means setting a constant of a balancing network to an optimum value automatically based on the change in the side tone level. CONSTITUTION:A control circuit 4 gives an instruction to a test signal generation circuit 130 so as to output the test signal of a level when the key telephone system is connected to a telephone line 100. The test signal generation circuit 130 receives the instruction, generates the test signal and sends the signal to a 4-wire side reception section of the hybrid coil 111 of a 2/4-wire conversion circuit 110. A level measuring circuit 120, in this case, measures the level of the side tone sent from a 4-wire sending section of the hybrid coil 11 and sends its detection output to the control circuit 4, which analyzes the detection output and sets the constant of a balancing network 112 to an optimum constant value to balance the telephone line 110.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 、＼。[Detailed description of the invention] [Industrial application field] ,\.

″ｌハ 本発明はボタン電話装置に関する。″lha The present invention relates to a button telephone device.

〔従来の技術〕[Conventional technology]

第２図はボタン電話装置の従来例のブロック図である。 FIG. 2 is a block diagram of a conventional key telephone device.

主装置１００１は、二線四線変換回路１２００と、通話
路〜イ・チ部１８００と、電話機イン２号、−ス部１４
００からなり、これら：を介してボタン電話機１５００
と電話回線１０００が接続きれている。二線四線変換回
路１２００　ｕ、ハイブリッド・コイル１２１０（！：
、を話回線１０００とのバランシング・ネットワーク１
２２０で構成されている。とこで、二線四線変換回路１
２００のバランシング−ネットワーク］２２０の定数値
は常に一定の値に設定されて□いた。The main device 1001 includes a two-wire/four-wire conversion circuit 1200, a communication line ~1/1 part 1800, a telephone input No. 2, and a -S part 14.
00 and these: through button telephone 1500
The telephone line 1000 is disconnected. Two-wire four-wire conversion circuit 1200 u, hybrid coil 1210 (!:
, a balancing network 1 with a talk line 1000
It consists of 220. By the way, two-wire four-wire conversion circuit 1
200 Balancing-Network] The constant value of 220 was always set to a constant value.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

上述した従来のボタン電話装置は、電話回線の終端条件
としてのバランシンク・ネットワークの定数値が常に一
定とたっていスので、線路の特性インピーダンス示大き
く異なる電話回線に接続された場合、平衡がとれなくな
り、通話のレベルが低下したり、側音レベルが大きくな
るなど通話に支障をきたすという欠点がある。In the conventional button telephone device described above, the constant value of the balancing network as a termination condition of the telephone line is always constant, so if it is connected to a telephone line whose line characteristic impedance differs significantly, it becomes unbalanced. However, there are drawbacks such as lowering the call level and increasing the sidetone level, which may interfere with the call.

〔問題点を解決するだめの手段〕[Failure to solve the problem]

本発明のボタン電話装置は、定数値の変更が可能々、二
線四線変換回路のバランシンク・ネットワークと、二線
四線変換回路のハイブリッド・コイルの四線側受信部に
テスト信号を送出するテスト信号発生回路と、ハイブリ
ッド会コイルにテスト信号が送出された後、その四線側
送信部から送出される側音のレベルを測定するレベル測
定回路と、テスト信号発生回路にテスト信号の送出を指
令し、その後レベル測定回路の測定出力を入力し、解析
してバランシング・ネックの定数を電話回線との平衡を
とるための最適な定数値に設定する制御回路を有するこ
とを特徴とする。The button telephone device of the present invention is capable of changing constant values, and sends a test signal to the balance network of the two-wire/four-wire conversion circuit and the four-wire side receiver of the hybrid coil of the two-wire/four-wire conversion circuit. A test signal generation circuit, a level measurement circuit that measures the level of sidetone sent from the four-wire side transmitter after the test signal is sent to the hybrid coil, and a level measurement circuit that sends the test signal to the test signal generation circuit. The present invention is characterized in that it has a control circuit that inputs the measurement output of the level measurement circuit, analyzes it, and sets the constant of the balancing neck to the optimum constant value for balancing with the telephone line.

〔実施例〕 次に、本発明の実施例について図面を参照して説明する
。[Example] Next, an example of the present invention will be described with reference to the drawings.

第１図は本発明のボタン電話装置の一実施例を示すブロ
ック図である。FIG. 1 is a block diagram showing an embodiment of the button telephone device of the present invention.

本実施例における主装置１０１は、二線四線変換回路１
１０と、レベル測定回路］２０と、テスト信号発生回路
１８０と、通話路スイッチ部］５０と、電話機インター
フェース部１６０および制御回路１４０からなり、これ
らを介してボタン電話機１７０と電話回線１００が接続
されている。The main device 101 in this embodiment includes a two-wire and four-wire conversion circuit 1
10, a level measurement circuit] 20, a test signal generation circuit 180, a communication path switch section] 50, a telephone interface section 160, and a control circuit 140, through which the button telephone 170 and the telephone line 100 are connected. ing.

二線四線変換回路１１０Ｕ、ハイブリッド・コイルＩｌ
ｌと、電話回線１００との平衡をとるためのバランシン
グ・ネットワーク１１２とで構成されている。ここで、
バランシング−ネットワーク】１２はいくつかの定数値
を持っており、定数値の変更が可能である。制御回路部
会は、ボタン電話装置が電話回線１００と接続された時
、テスト信号発生回路１８０に、あるレベルのテスト信
号を出力するように命令する。テスト信号発生回路１８
０はその命令を受け、テスト信号を発生し、二線四線変
換回路１１０のハイブリッド・コイル】１１の四線側受
信部に送る。レベル測定回路］２０はこの時、ハイブリ
ッド自コイル１１１の四線側送信部から送出される側音
のレベルを測定し、その検出出力を制御回路孤４へ送る
。制御回路へ４はその検出出力を解析して、バランシン
グ・ネットワーク１１２の定数値を電話回線１００との
平衡をとるための最適な定数値に設定する。Two-wire four-wire conversion circuit 110U, hybrid coil Il
1 and a balancing network 112 for balancing the telephone line 100. here,
Balancing Network] 12 has several constant values, and the constant values can be changed. The control circuit committee instructs the test signal generation circuit 180 to output a test signal of a certain level when the button telephone device is connected to the telephone line 100. Test signal generation circuit 18
0 receives the command, generates a test signal, and sends it to the four-wire side receiving section of the hybrid coil 11 of the two-wire/four-wire conversion circuit 110. At this time, the level measurement circuit 20 measures the level of the sidetone transmitted from the four-wire side transmitter of the hybrid self-coil 111 and sends the detection output to the control circuit 4. The control circuit 4 analyzes the detection output and sets the constant value of the balancing network 112 to the optimum constant value for balancing with the telephone line 100.

りお、本発明は、二線四線の変換を必要とするＴＤＭ通
話路スイッチを具備したボタン電話装置にもそのまま適
用することができる。Furthermore, the present invention can be directly applied to a key telephone device equipped with a TDM call path switch that requires two-line and four-line conversion.

〔発明の効果〕。〔Effect of the invention〕.

以上説明したように本発明は、側音レベルの変化に基づ
きバランシング・ネットワークの定数値を自動的に最適
に設定する手段を具備したことにより、特性イン、ピー
ダンスの大きく異なる電話回線に接続された場合であっ
ても、電話回線との不平衡のために生じる側音の増大や
通話レベルの低下を自動的に防止することができるとい
う効果がある。As explained above, the present invention is equipped with means for automatically optimizing the constant values of the balancing network based on changes in the sidetone level. Even if the telephone line is unbalanced, it is possible to automatically prevent an increase in sidetone and a decrease in speech level due to imbalance with the telephone line.

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

第１図は本発明のボタン電話装置の一実施例を示すブロ
ック図、第２図は従来例を示すブロック図である。 一゛６１、 Ｘ １００・・・電話回線、 １０１・・・主装置、 １１０・・・二線四線変換回路、 １１１・・・ハイブリッド−コイル、 １１２・・・バランシング・ネットワーク、１２０・・
・レベル測定回路、 １８０・・・テスト信号発生回路、 １４０・・・制御回路、 １５０・・・通話路スイッチ部、 １６０・・・電話機インターフェース部、１７０・・・
ボタン電話機。FIG. 1 is a block diagram showing one embodiment of the button telephone device of the present invention, and FIG. 2 is a block diagram showing a conventional example. 1゛61,
- Level measurement circuit, 180... Test signal generation circuit, 140... Control circuit, 150... Call path switch section, 160... Telephone interface section, 170...
button telephone.

Claims (1)

【特許請求の範囲】 ボタン電話装置において、 定数値の変更が可能な、二線四線変換回路のバランシン
グ・ネットワークと、 二線四線変換回路のハイブリッド・コイルの四線側受信
部にテスト信号を送出するテスト信号発生回路と、 ハイブリッド・コイルにテスト信号が送出された後、そ
の四線側送信部から送出される側音のレベルを測定する
レベル測定回路と、 テスト信号発生回路にテスト信号の送出を指令し、その
後、レベル測定回路の測定出力を入力し、解析してバラ
ンシング・ネックの定数を電話回線との平衡をとるため
の最適な定数値に設定する制御回路を有することを特徴
とするボタン電話装置。[Claims] In a button telephone device, a balancing network of a two-wire/four-wire conversion circuit whose constant value can be changed, and a test signal sent to a four-wire side receiving section of a hybrid coil of the two-wire/four-wire conversion circuit. A level measurement circuit that measures the level of sidetone transmitted from the four-wire side transmitter after the test signal is transmitted to the hybrid coil; A test signal generation circuit that transmits the test signal to the test signal generation circuit. It is characterized by having a control circuit that commands the transmission of button telephone device.
JP2312986A 1986-02-04 1986-02-04 Push-button telephone system Pending JPS62180621A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2312986A JPS62180621A (en) 1986-02-04 1986-02-04 Push-button telephone system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2312986A JPS62180621A (en) 1986-02-04 1986-02-04 Push-button telephone system

Publications (1)

Publication Number Publication Date
JPS62180621A true JPS62180621A (en) 1987-08-07

Family

ID=12101910

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2312986A Pending JPS62180621A (en) 1986-02-04 1986-02-04 Push-button telephone system

Country Status (1)

Country Link
JP (1) JPS62180621A (en)

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