JPS5925435B2 - Method for stopping central office line ringtones in button telephone equipment - Google Patents

Description

【発明の詳細な説明】 本発明は四線式ボタン電話装置における局線着信音停止
に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to stopping a central office line ring tone in a four-wire key telephone device.

従来のボタン電話装置で＆Ｌボタン主装置とボタン電話
機を結ぷケーブルにおいて局線着信音送出線と内線呼出
線が別線で布線されているため、ある特定のボタン電話
機の局線着信音を停止させたい時は、そのボタン電話機
と局線着信音送出線を結ぶ接点をスイッチで制御するよ
うにして、そのスイッチ接断制御することによつて内線
呼出には関係なく局線着信音を停止または発音させるこ
とができた。In conventional button telephone devices, the cable that connects the &L button main device and the button telephone has separate wires for the central office line ring tone transmission line and the extension calling line, so that the central office line ring tone of a particular button telephone cannot be transmitted. When you want to stop it, use a switch to control the contact that connects the key telephone and the central office line ringing tone transmission line, and by controlling the connection/disconnection of that switch, the central office line ringing tone will be stopped regardless of extension calls. Or could be pronounced.

しかし、四線式ボタン電話装置の場合は一対の制御線の
みで局線着信音と内線呼出音を送出するので、局線着信
音を停止するとこれに伴つて内線呼出音も停止してしま
うため、局線着信音だけを停止させることはできなかつ
た。However, in the case of a four-wire button telephone device, the office line ring tone and extension ring tone are transmitted using only one pair of control lines, so when the office line ring tone is stopped, the extension ring tone is also stopped. However, it was not possible to stop only the central office line ringtone.

本発明は、四線式ボタン電話装置である特定のボタン電
話機、たとえば病人の寝室等で局線着信音が鳴るとうる
さくて困るという場所に設置されているボタン電話機は
、内線呼出音は聞こえて局線着信音だけは停止したいと
いう要望を満足させることができるボタン電話装置にお
ける局線着信音停止方式を提供するものである。The present invention is a four-wire key telephone device, which is a specific key telephone device, for example, a key telephone installed in a sick person's bedroom, etc., where the ring tone of the central office line is too noisy. To provide a system for stopping a central office line ringing tone in a key telephone device, which can satisfy the desire to stop only the central office line ringing tone.

以下図面により本発明を詳細に説明する。The present invention will be explained in detail below with reference to the drawings.

図１は本発明の実施例を示すブロックを含む回路図であ
つて、１はボタン主装置、２、３はそれぞれボタン電話
機でその間は一対の通話線４、５と一対の制御線６、７
で合計４本のケーブルでブランチ接線されている。FIG. 1 is a circuit diagram including blocks showing an embodiment of the present invention, in which 1 is a button main device, 2 and 3 are button telephones, and between them, a pair of communication lines 4 and 5 and a pair of control lines 6 and 7 are shown.
The branches are connected with a total of four cables.

また、８、９は局線用端子、１０は受信回路、１１は継
電器で１１−１、１１−２はその接点である。１２は局
線着信音信号送出回路、１３は増幅器、１４、１８はト
ランス、１５、１６、２４はコンデンサ、ＩＴ、２１は
固定抵抗器、２２はトランジスタ、１９はスピーカであ
る。Further, 8 and 9 are office line terminals, 10 is a receiving circuit, 11 is a relay, and 11-1 and 11-2 are its contacts. 12 is a station line ring tone signal sending circuit, 13 is an amplifier, 14, 18 are transformers, 15, 16, 24 are capacitors, IT, 21 is a fixed resistor, 22 is a transistor, and 19 is a speaker.

２０は局線着信音停止スイッチ、２３は内線呼出音信号
送出回路、２５は局線選択・局線保留等の信号送出回路
、２６は２５の信号を受けて各種の制御を行う制御回路
である。Reference numeral 20 denotes a switch for stopping the ringing tone of the central office line, 23 a circuit for transmitting an extension ringing tone signal, 25 a circuit for transmitting signals such as central line selection and telephone hold, and 26 a control circuit that performs various controls in response to the signals of 25. .

２７は接続・保留を行う被制御回路であり、２８はボタ
ン電話機２の通話回路である。27 is a controlled circuit that performs connection/holding, and 28 is a call circuit of the button telephone 2.

以下この回路の動作について説明する。The operation of this circuit will be explained below.

局線用端子８、９に局線が接続されそこに着信信号が局
交換機から到来すると、受信回路１０内の継電器１１が
動作する。この継続器１１の動作でその接点１１−１，
１１−２が切替わる。接点１１−１の動作により次のル
ートで局線着信音（以下局着音という）が送出される。
すなわち、〔局着音信号送出回路１２→接点１１−１→
増幅器１３→トランス１４の１次巻線１４−１→接地〕
と流れ局着音は１次巻線１４−１に印加され、これは２
次巻線１４−２に誘起される。誘起された局着音は〔電
源ｅ→コンデンサ１５→トランスの２次側１４−２→制
御線６→コンデンサ１６→固定抵抗器１７→トランス１
８の１次側１８−１→制御線７→接地〕と流れ、トラン
ス１８の１次側１８１に印加された局着音は２次側１８
−２に誘起されスピーカ１９を発音させる。また、この
時制御線６〜７間には接点１１−２によつて４電源電圧
が印加されている。従つて、この時局着音停止スイツチ
２０を切替えると、〔電源１→接点１１２→トランス１
４の２次側１４−２→制御線６→局着音停止スイツチ２
０→固定抵抗器２１→トランジスタ２２のベース・エミ
ツタ路→制御線７→接地〕と直流電流が流れトランジス
タ２２がオンになる為トランス１８の１次側１８−１が
短絡され、スピーカ１９からの局着音が停止される。次
に内線呼出音の場合について述べる。内線呼出音は、〔
内線呼出音信号送出回路２３→接点１１−１→増幅器１
３→トランス１４の１次側１４−１→接地〕と流れトラ
ンス１４の２次側１４−２に誘起された内線呼出音は、
〔電源ｅ→コンデンサ１５→トランスの２次側１４−２
→制御線６→コンデンサ１６→固定抵抗器１７→トラン
ス１８の１次側１８−１→制御線７→接地〕と流れ、ト
ランス１８の２次側１８−２に誘起された内線呼出音信
号はスピーカ１９を発音させる。また、この時接点１１
−２は閉じていない為、制？御線６〜７間には電圧は印
加されていない。従つつて局着音停止スイツチ２０を閉
じてもトランジスタ２２がオンにならない為、トランス
１８の１次側１８−１が短絡されないことになり内線呼
出音はスピーカ１９を発音させることができる。以上の
ように、内線呼出時には局着音停止スイツチ２０の状態
のいかんにかかわらずトランジスタ２２はオフ状態を維
持し続けるので、内線呼出音はスピーカ１９より発音さ
れる。また、この時内線呼出音信号の半波成分でトラン
ジスタ２２がオンにならないようにコンデンサ２４が挿
入されている。When a central office line is connected to the central office line terminals 8 and 9 and an incoming signal arrives therefrom from the central office exchange, a relay 11 in a receiving circuit 10 is activated. Due to the operation of this continuator 11, its contacts 11-1,
11-2 is switched. By the operation of the contact 11-1, a central office line ringing tone (hereinafter referred to as central office ringing tone) is transmitted through the next route.
That is, [local ringing signal sending circuit 12→contact 11-1→
Amplifier 13 → Primary winding 14-1 of transformer 14 → Ground]
The current station ringing tone is applied to the primary winding 14-1, which is
induced in the next winding 14-2. The induced local ringing sound is [power supply e → capacitor 15 → transformer secondary side 14-2 → control line 6 → capacitor 16 → fixed resistor 17 → transformer 1
8's primary side 18-1 → control line 7 → ground], and the local ringing tone applied to the primary side 181 of the transformer 18 is transmitted to the secondary side 18.
-2 to cause the speaker 19 to produce sound. Further, at this time, four power supply voltages are applied between the control lines 6 and 7 through the contact 11-2. Therefore, when the station ringing stop switch 20 is switched at this time, [power supply 1 → contact 112 → transformer 1
4 secondary side 14-2 → control line 6 → station ringing stop switch 2
0 -> fixed resistor 21 -> base-emitter path of transistor 22 -> control line 7 -> ground], a DC current flows and transistor 22 is turned on, so that the primary side 18-1 of transformer 18 is short-circuited, and the output from speaker 19 is The station ringtone is stopped. Next, the case of extension ringing will be described. The extension ringtone is [
Extension ringing signal sending circuit 23 → contact 11-1 → amplifier 1
3→primary side 14-1 of transformer 14→ground] and the extension ringing tone induced in the secondary side 14-2 of transformer 14 is as follows.
[Power supply e → capacitor 15 → secondary side of transformer 14-2
→ control line 6 → capacitor 16 → fixed resistor 17 → primary side 18-1 of transformer 18 → control line 7 → ground], and the extension ringing signal induced on the secondary side 18-2 of transformer 18 is Make the speaker 19 produce sound. Also, at this time, contact 11
-2 is not closed, so is it restricted? No voltage is applied between the control lines 6 and 7. Therefore, even if the station ringing stop switch 20 is closed, the transistor 22 is not turned on, so the primary side 18-1 of the transformer 18 is not short-circuited, and the extension ringing tone can be output from the speaker 19. As described above, when an extension call is made, the transistor 22 remains off regardless of the state of the local ring stop switch 20, so that the extension ring tone is emitted from the speaker 19. Further, a capacitor 24 is inserted to prevent the transistor 22 from being turned on by the half-wave component of the extension ringing tone signal at this time.

以上説明したように、本発明によれば局線着信音と内線
呼出音が同一制御線を使つて授受されるボタン電話装置
において、ボタン電話機扱者の必要に応じて内線呼出機
能を損なうことなく局線着信音を停止することができる
効果がある。As explained above, according to the present invention, in a button telephone device in which a central office line ring tone and an extension ring tone are transmitted and received using the same control line, the function of calling an extension can be set according to the needs of the button telephone operator without impairing the function. This has the effect of stopping the station line ringtone.

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

図１は本発明の実施例を示すプロツクを含む回路図であ
る。 １・・・・・・主装置、２，３・・・・・・ボタン電話
機、４，５・・・・・・通話線、６，７・・・・・・制
御線、８，９・・・・・・局線用端子、１０・・・・・
・受信回路、１１・・・・・・継電器、１２・・・・・
・局線着信音信号送出回路、１３・・・・・・増幅器、
２０・・・・・・局線着信音停止スイツチ、２３・・・
・・・内線呼出音信号送出回路、２５・・・・・・信号
送出回路、２６・・・・・・制御回路、２７・・・・・
・接続保留回路。FIG. 1 is a circuit diagram including a block showing an embodiment of the present invention. 1... Main device, 2, 3... Button telephone, 4, 5... Call line, 6, 7... Control line, 8, 9... ...Terminal for office line, 10...
・Reception circuit, 11... Relay, 12...
- Office line ringing tone signal transmission circuit, 13... amplifier,
20... Central line ringtone stop switch, 23...
...Extension ringing signal sending circuit, 25... Signal sending circuit, 26... Control circuit, 27...
・Connection hold circuit.

Claims (1)

【特許請求の範囲】[Claims] １ 局線着信時に直流電流を重畳した局線着信音信号を
一対の制御線に送出する手段と、内線呼出時に前記一対
の制御線に内線呼出音信号のみを送出する手段とをボタ
ン電話装置に備えるとともに、前記局線着信音信号と前
記内線呼出音信号を受信してスピーカを発音するボタン
電話機には、前記局線着信時にのみ重畳された直流電流
を検知しスピーカの発音を停止するスピーカ切断手段と
、該スピーカ切断手段を動作可能状態と動作不能状態に
切換える切断手段とを備えたボタン電話装置における局
線着信音停止方式。1. A button telephone device is provided with means for transmitting a central office line ringing tone signal with a direct current superimposed thereon to a pair of control lines when a central office call arrives, and means for transmitting only an extension ringing signal to the pair of control lines when an extension call is received. In addition, the button telephone that receives the central office line ringing tone signal and the extension ringing signal and produces a sound through a speaker is equipped with a speaker disconnection function that detects the superimposed direct current only when the central office line incoming call is received and stops the speaker from producing sound. 1. A central office line ring tone stopping system in a button telephone device, comprising: a means for cutting off a speaker; and a cutting means for switching the speaker cutting means between an operable state and an inoperable state.