JPH0414818B2 - - Google Patents

Info

Publication number
JPH0414818B2
JPH0414818B2 JP59091788A JP9178884A JPH0414818B2 JP H0414818 B2 JPH0414818 B2 JP H0414818B2 JP 59091788 A JP59091788 A JP 59091788A JP 9178884 A JP9178884 A JP 9178884A JP H0414818 B2 JPH0414818 B2 JP H0414818B2
Authority
JP
Japan
Prior art keywords
circuit
telephone
telephones
matching circuit
resistor
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.)
Expired - Lifetime
Application number
JP59091788A
Other languages
Japanese (ja)
Other versions
JPS60236348A (en
Inventor
Toshio Nishimura
Shinichi Tokita
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 Platforms Ltd
Original Assignee
Nitsuko 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 Nitsuko Corp filed Critical Nitsuko Corp
Priority to JP59091788A priority Critical patent/JPS60236348A/en
Priority to AU42217/85A priority patent/AU4221785A/en
Priority to US06/732,384 priority patent/US4656660A/en
Priority to GB08511834A priority patent/GB2160744A/en
Publication of JPS60236348A publication Critical patent/JPS60236348A/en
Publication of JPH0414818B2 publication Critical patent/JPH0414818B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H04M3/428—Arrangements for placing incoming calls on hold
    • H04M3/4283—Call holding circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/80—Telephone line holding circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)

Description

【発明の詳細な説明】 〔発明の技術分野〕 本発明は電話機の保留回路に係り、特に一対の
局線に複数の電話機を並列に接続するいわゆる親
子電話機において、保留状態にある電話機を保留
状態から自動的に解除できる機能を有する保留回
路に関するものである。[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a holding circuit for a telephone, and particularly in a so-called parent-child telephone in which a plurality of telephones are connected in parallel to a pair of central office lines, a telephone that is on hold is placed on hold. The present invention relates to a holding circuit that has a function of automatically canceling the hold.

〔発明の技術背景〕[Technical background of the invention]

一般に一対のみの局線、即ち単一の電話機回線
を共用し、この一対の局線に対して複数の電話機
を並列に接続せしめ、それぞれ互いに離れた個所
に設置可能にし得るいわゆる親子電話機が提案さ
れている。 In general, so-called parent-child telephones have been proposed in which only one pair of office lines, that is, a single telephone line, is shared, and multiple telephones are connected in parallel to this pair of office lines so that they can be installed at separate locations. ing.

例えばある家屋において、１階と２階にそれぞ
れ電話機を設置し、一対の局線に接続した場合、
１階に設置した電話機で着信応答をし、２階に設
置した電話機で再応答するような時、１階の電話
機において送受器を外した状態、即ちオフフツク
状態に維持し、２階の電話機の送受器を上げる、
即ちオフフツクすることにより通話可能になる。 For example, in a certain house, if telephones are installed on the first and second floors and connected to a pair of office lines,
When answering an incoming call with the telephone installed on the first floor and re-answering with the telephone installed on the second floor, the telephone on the first floor should be disconnected from the handset, that is, kept in an off-hook state, and the telephone on the second floor should be kept in an off-hook state. Raise the handset,
That is, by going off-hook, it becomes possible to talk.

〔従来技術と問題点〕[Conventional technology and problems]

しかしながらこの構成では２階の電話機におい
て通話を終了した後、必ず１階の電話機の送受器
を降ろす、即ちオンフツクするか、もしくは２階
の電話機の送受器を上げた、即ちオフフツクした
後、１階の電話機をオンフツクして２階の電話機
で通話するようにしなければ通話終了後１階の電
話機において外線からの着信が行われず、使い勝
手上煩雑になる問題があつた。 However, with this configuration, after ending a call on the telephone on the second floor, you must either lower the handset of the telephone on the first floor, that is, turn it on-hook, or raise the handset of the telephone on the second floor, that is, turn it off-hook. Unless the telephone on the second floor is turned on and the telephone on the second floor is used to make a call, the telephone on the first floor will not receive a call from an outside line after the call ends, which is a problem in terms of ease of use.

一方、この問題を解決するために、ボタン電話
装置として周囲の多機能を有する電話装置が提案
されている。この電話装置は一以上の局線に接続
され得、且つ操作面上に多数のプツシユボタンを
配列した複数のボタン電話機及びこれらの電話機
を制御する主装置を具備しており、通常の外線と
の通話機能の他に通話中に保留する機能、主装置
を介して接続された複数の電話機相互のいわゆる
内線通話機能等を果たす。しかしながら此の構成
では上述の親子電話機における問題点を充分に解
決出来る反面、複雑で高価な多数の回路部品が必
要であり、電話装置が極めて高価になる問題があ
つた。 On the other hand, in order to solve this problem, a telephone device having multiple peripheral functions has been proposed as a button telephone device. This telephone device can be connected to one or more central office lines, and is equipped with a plurality of button telephones with a large number of push buttons arranged on the operation surface, and a main device that controls these telephones, and is capable of making calls to ordinary outside lines. In addition to these functions, it also performs functions such as holding a call during a call and a so-called extension call function between multiple telephones connected via the main device. However, while this configuration can satisfactorily solve the above-mentioned problems with parent-child telephones, it requires a large number of complicated and expensive circuit parts, making the telephone device extremely expensive.

〔発明の目的〕[Purpose of the invention]

しかして、本発明の目的は一対の局線に接続さ
れた複数の電話機、即ち親子電話機の間の一の電
話機において、着信応答した該一の電話機を保留
状態にした後その送受器をオンフツクし、別の電
話機において通話のために送受器をオフフツクし
た時、前記一の電話機の保留状態を自動解除する
回路を提供するにある。 Therefore, an object of the present invention is to place a plurality of telephones connected to a pair of central office lines, that is, one telephone between a parent and child telephone, on hold after answering an incoming call, and then turn the receiver on-hook. Another object of the present invention is to provide a circuit that automatically releases the hold state of the first telephone when the handset is taken off-hook to make a call on another telephone.

本発明の他の目的は相対的に低廉な自動解除機
能付保留回路を親子電話機の少なくとも一に付設
することにより、当初着信応答し、保留した親電
話機の送受器を直ちにオンフツク可能にせしめ
得、子電話機において通話終了後オフフツク状態
に置かれることを防ぐにある。 Another object of the present invention is to attach a relatively inexpensive holding circuit with an automatic release function to at least one of the parent and child telephones, so that the handset of the parent telephone that initially answers an incoming call and is put on hold can be immediately turned on-hook; To prevent a slave phone from being placed in an off-hook state after a call ends.

本発明の更に他の目的は相対的に低廉な自動解
除機能付保留回路のみを付設するだけで周知の親
子電話機に生じていた問題点を解決出来、使い勝
手を向上し得るに併せ、低コストをもつて上述の
目的を実現して汎用性に富ませ得るにある。 Still another object of the present invention is to be able to solve the problems that have occurred in well-known parent-child telephones by simply adding a relatively inexpensive holding circuit with an automatic release function, improve usability, and reduce costs. It is possible to realize the above-mentioned purpose and increase versatility.

〔発明の構成〕[Structure of the invention]

本発明は一対の局線に対して複数の電話機を並
列に接続したいわゆる親子電話機において、前記
電話機の少なくとも一台に局線に対してブリツジ
整流回路からなる極性一致回路を設け、該極性一
致回路の出力と並列にトランジスタと該トランジ
スタのコレクタに直列に負荷を接続した局線捕捉
回路を設け、前記極性一致回路のプラス側に第１
の抵抗の一端を接続し、他端をシリコン制御整流
器のアノード側に接続し、該シリコン制御整流器
のカソードに第２の抵抗の一端を接続し、他端を
前記極性一致回路のマイナス側に接続し、該第２
の抵抗と並列にコンデンサを接続し、前記トラン
ジスタのベースと前記シリコン制御整流器のアノ
ードとを接続し、前記極性一致回路の出力側にス
イツチを介して前記シリコン制御整流器のゲート
にトリガパルスを加える為の一般に用いられるト
リガ回路が設けたれていることを特徴とする。 The present invention provides a so-called parent-child telephone in which a plurality of telephones are connected in parallel to a pair of office lines, in which at least one of the telephones is provided with a polarity matching circuit consisting of a bridge rectifier circuit for the office line, and the polarity matching circuit A station line capture circuit including a transistor and a load connected in series to the collector of the transistor is provided in parallel with the output of the transistor, and a first line capture circuit is provided on the positive side of the polarity matching circuit.
one end of a second resistor is connected to the anode side of the silicon-controlled rectifier, the other end is connected to the anode side of the silicon-controlled rectifier, one end of the second resistor is connected to the cathode of the silicon-controlled rectifier, and the other end is connected to the negative side of the polarity matching circuit. and the second
connect a capacitor in parallel with the resistor, connect the base of the transistor and the anode of the silicon-controlled rectifier, and apply a trigger pulse to the gate of the silicon-controlled rectifier via a switch on the output side of the polarity matching circuit; A commonly used trigger circuit is provided.

〔発明の実施例〕[Embodiments of the invention]

次に本発明の一実施例を図面に基づき詳細に説
明する。 Next, one embodiment of the present invention will be described in detail based on the drawings.

第１図は本発明の一実施例を示す回路図であ
る。図において１は一対の局線、２は自動解除機
能付保留回３は極性一致回路、４はトランジスタ
と該トランジスタの負荷とから成る局線捕捉回
路、５はシリコン制御整流器のトリガ回路、L1，
L2は局線端子、TEL1〜TELoは電話機、TRはト
ランジスタ、LEDは発光ダイオード、SCRはシ
リコン制御整流器（以下SCRと言う）、R1〜R6は
抵抗、C1〜C2はコンデンサ、Ｈは保留用スイツ
チ、HSは電話機のフツクスイツチである。 FIG. 1 is a circuit diagram showing an embodiment of the present invention. In the figure, 1 is a pair of station lines, 2 is a holding circuit with an automatic release function, 3 is a polarity matching circuit, 4 is a station line capture circuit consisting of a transistor and the load of the transistor, 5 is a trigger circuit of a silicon-controlled rectifier, and L 1 ，
L 2 is the office line terminal, TEL 1 to TEL o are telephones, TR is a transistor, LED is a light emitting diode, SCR is a silicon controlled rectifier (hereinafter referred to as SCR), R 1 to R 6 are resistors, and C 1 to C 2 are The capacitor, H is a hold switch, and HS is a telephone hook switch.

次に動作について説明する。 Next, the operation will be explained.

説明の都合上、電話機の自動解除機能付保留回
路が電話機TEL1に内設されている場合について
説明する。 For convenience of explanation, a case will be described in which a telephone hold circuit with an automatic release function is installed in the telephone TEL 1 .

電話機TEL1に着信があり、該電話機の送受器
（図面にない）を上げる、即ちオフフツクすると、
フツクスイツチHSが閉じ、即ちオンとなる。着
信応答して保留する場合、保留用スイツチＨを閉
じ、即ちオンすると局線の直流電源は極性一致回
路３、フツクスイツチHS、保留用スイツチＨを
介してコンデンサC2に印加され、該コンデンサ
C2と抵抗R6による微分波形の電流が抵抗R4を介
してSCRのゲートにトリガ入力されることによ
り、該SCRはオンして局線の直流電流は局線端
子L1、極性一致回路３、抵抗R1、SCR、抵抗R2、
極性一致回路３、局線端子L2の回路で流れる。
従つてトランジスタTRのエミツタ−ベース間に
も前記直流電流は局線端子L1、極性一致回路３、
トランジスタTR、SCR、抵抗R2、極性一致回路
３、局線端子L2の回路で電流が流れ、該トラン
ジスタTRはオンとなり、局線端子L1、極性一致
回路３、トランジスタTR、抵抗R3、発光ダイオ
ードLED、極性一致回路３、局線端子L2のルー
プが出来る。従つて、電話機TEL1の送受器（図
面にない）をオンフツクしても局線は前記ループ
回路で捕捉された状態となる。しかして電話機
TEL1の送受器をオンフツクすることにより、並
列に接続された電話機TEL1の通話路抵抗（図面
にない）が切り離されて、局線端子L1，L2間の
電圧は上がる。従つてコンデンサC1の充電電圧
も上がる。次に電話機TEL2の受信器（図面にな
い）をオフフツクすることにより、電話機TEL2
の通話路抵抗（図面にない）と前記自動解除機能
付保留回路２の局線捕捉回路４が並列に接続さ
れ、局線端子L1，L2間の電位は降下する。 There is an incoming call on telephone TEL 1 , and when you raise the handset (not shown in the drawing) of the telephone, that is, take it off-hook,
The switch HS is closed, ie, turned on. When answering an incoming call and putting it on hold, when the hold switch H is closed, that is, turned on, the direct current power of the central office line is applied to the capacitor C2 via the polarity matching circuit 3, the hook switch HS, and the hold switch H.
When the differential waveform current generated by C 2 and resistor R 6 is triggered into the gate of the SCR via resistor R 4 , the SCR is turned on and the DC current of the station line is transferred to the station line terminal L 1 and the polarity matching circuit. 3. Resistor R 1 , SCR, Resistor R 2 ,
Flows through the polarity matching circuit 3 and the station line terminal L2 circuit.
Therefore, the DC current is also transmitted between the emitter and base of the transistor TR through the station line terminal L1 , the polarity matching circuit 3,
A current flows through the circuit consisting of transistors TR, SCR, resistor R 2 , polarity matching circuit 3, and central line terminal L 2 , and the transistor TR turns on, leading to central line terminal L 1 , polarity matching circuit 3, transistor TR, and resistor R 3 , a light emitting diode LED, a polarity matching circuit 3, and a loop of the station line terminal L2 . Therefore, even if the handset (not shown in the drawings) of the telephone TEL 1 is turned on, the central office line remains captured by the loop circuit. However, the telephone
By on-hooking the handset of TEL 1 , the line resistance (not shown in the drawing) of the parallel-connected telephone TEL 1 is disconnected, and the voltage between the office line terminals L 1 and L 2 increases. Therefore, the charging voltage of capacitor C1 also increases. Next, by off-hooking the receiver of telephone TEL 2 (not shown in the drawing),
The communication path resistance (not shown in the drawing) and the office line capture circuit 4 of the automatic release holding circuit 2 are connected in parallel, and the potential between the office line terminals L 1 and L 2 drops.

しかるに前記SCRのカソード側に接続された
前記コンデンサC1の充電電位は該SCRのアノー
ド側電位より高い状態となり、該SCRを流れる
電流はのSCRの保持電流以下となり、該SCRは
オフ状態となり、従つてトランジスタTRもオフ
となり、局線捕捉回路４による局線捕捉は出来な
くなる。即ち保留状態は解除される。同様に複数
の電話機が設けられた場合に電話機TELoの送受
器を上げても電話機TEL1の保留状態を自動的に
解除することが出来ることは容易に理解すること
が出来る。また、前記電話機の自動解除機能付保
留回路はTEL2〜TELoに内設してもよいことは
明らかである。また、保留状態にあるか否かを確
認するに、局線捕捉回路４に直列に発光ダイオー
ドLEDを挿入することにより、トランジスタTR
がオンの時、該発光ダイオードLEDに電流が流
れ保留状態を表示することが可能である。尚本発
明においては局線捕捉回路４を設けることによ
り、抵抗R1の抵抗値を大きくし、電流容量の小
さいSCRを使用し低廉且つ小型化を図ることが
出来る。 However, the charging potential of the capacitor C1 connected to the cathode side of the SCR becomes higher than the anode side potential of the SCR, the current flowing through the SCR becomes less than the holding current of the SCR, and the SCR turns off. Therefore, the transistor TR is also turned off, making it impossible for the station line acquisition circuit 4 to acquire the station line. In other words, the pending state is released. Similarly, it is easy to understand that when a plurality of telephones are provided, even if the handset of telephone TEL o is raised, the hold state of telephone TEL 1 can be automatically released. Further, it is clear that the holding circuit with an automatic release function of the telephone may be internally installed in TEL 2 to TEL o . In addition, to check whether the status is on hold or not, by inserting a light emitting diode LED in series with the station line capture circuit 4, the transistor TR
When is on, current flows through the light emitting diode LED to indicate a pending state. In the present invention, by providing the station line acquisition circuit 4, the resistance value of the resistor R1 can be increased, and an SCR with a small current capacity can be used, thereby making it possible to reduce the cost and size.

〔発明の効果〕〔Effect of the invention〕

以上説明したように、本発明によれば１対の局
線に対し複数の電話機を並列に接続したいわゆる
親子電話機において、少なくとも１台の電話機に
自動解除機能付保留回路を設け、該電話機で着信
応答した後、一旦保留状態となし、送受器を降ろ
し、該電話機又は別の電話機にて再応答した時に
前記保留した電話機の保留状態を自動的に解除出
来るため、従来のように最初に着信応答した電話
機の送受器を再応答した電話機の状態（通話終了
後、或いは送受信をオフフツクした後）を確認し
て降ろす必要がなく、また送受器の降ろしも忘れ
もなくなり、使用者にとつて使用勝手を向上さ
せ、その実用的効果は極めて大きい。 As explained above, according to the present invention, in a so-called parent-child telephone in which a plurality of telephones are connected in parallel to a pair of office lines, at least one telephone is provided with a hold circuit with an automatic release function, and a call is received by the telephone. After answering, the phone is put on hold, then when the handset is put down and the phone is answered again using the same phone or another phone, the phone on hold can be automatically released from the hold status, so the incoming call can be answered first like in the past. There is no need to check the status of the telephone that answered the phone again (after the end of the call, or after taking off-hook from sending and receiving) before taking it down, and there is no need to forget to take down the handset. The practical effects are extremely large.

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

第１図は本発明による自動解除機能付保留回路
の一実施例の構成を示した回路図である。 １……局線、２……自動解除機能付保留回路、
３……極性一致回路、４……局線捕捉回路、５…
…SCRのトリガ回路。 FIG. 1 is a circuit diagram showing the configuration of an embodiment of a holding circuit with an automatic release function according to the present invention. 1...Station line, 2...Holding circuit with automatic release function,
3...Polarity matching circuit, 4...Station line acquisition circuit, 5...
...SCR trigger circuit.

Claims (1)

【特許請求の範囲】 １ 一対の局線に対して複数の電話機を並列に接
続したいわゆる親子電話機において、前記電話機
の少なくとも一台に局線に対して極性一致回路を
設け、該極性一致回路の出力と並列にトランジス
タと該トランジスタのコレクタに直列に負荷を接
続した局線捕捉回路を設け、前記極性一致回路の
プラス側に第１の抵抗の一端を接続し、他端をシ
リコン制御整流器のアノード側に接続し、該シリ
コン制御整流器のカソードに第２の抵抗の一端を
接続し、他端を前記極性一致回路のマイナス側に
接続し、該第２の抵抗と並列にコンデンサを接続
し、前記トランジスタのベースと前記シリコン制
御整流器のアノードとを接続し、前記極性一致回
路の出力側にスイツチを介して前記シリコン制御
整流器のゲートにトリガパルスを加える為のトリ
ガ回路が設けられていることを特徴とする電話機
の自動解除機能付保留回路。 ２ 特許請求の範囲第１項記載の負荷が抵抗と発
光ダイオードとから成ることを特徴とする電話機
の自動解除機能付保留回路。[Claims] 1. In a so-called parent-child telephone in which a plurality of telephones are connected in parallel to a pair of office lines, at least one of the telephones is provided with a polarity matching circuit for the office line, and the polarity matching circuit is A station line capture circuit is provided in parallel with the output, including a transistor and a load connected in series to the collector of the transistor, one end of a first resistor is connected to the positive side of the polarity matching circuit, and the other end is connected to the anode of a silicon-controlled rectifier. one end of a second resistor is connected to the cathode of the silicon controlled rectifier, the other end is connected to the negative side of the polarity matching circuit, a capacitor is connected in parallel with the second resistor; A trigger circuit is provided on the output side of the polarity matching circuit, connecting the base of the transistor and the anode of the silicon-controlled rectifier, for applying a trigger pulse to the gate of the silicon-controlled rectifier via a switch. Hold circuit with automatic release function for telephones. 2. A holding circuit with an automatic release function for a telephone set, wherein the load according to claim 1 comprises a resistor and a light emitting diode.
JP59091788A 1984-05-10 1984-05-10 Holding circuit with automatic release function of telephone Granted JPS60236348A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP59091788A JPS60236348A (en) 1984-05-10 1984-05-10 Holding circuit with automatic release function of telephone
AU42217/85A AU4221785A (en) 1984-05-10 1985-05-09 Office line holding circuit
US06/732,384 US4656660A (en) 1984-05-10 1985-05-09 Office line holding circuit with an automatic release function for direct connection telephone system
GB08511834A GB2160744A (en) 1984-05-10 1985-05-10 Exchange line holding circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59091788A JPS60236348A (en) 1984-05-10 1984-05-10 Holding circuit with automatic release function of telephone

Publications (2)

Publication Number Publication Date
JPS60236348A JPS60236348A (en) 1985-11-25
JPH0414818B2 true JPH0414818B2 (en) 1992-03-16

Family

ID=14036338

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59091788A Granted JPS60236348A (en) 1984-05-10 1984-05-10 Holding circuit with automatic release function of telephone

Country Status (1)

Country Link
JP (1) JPS60236348A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5290204A (en) * 1976-01-26 1977-07-29 Nikko Electric Mfg Device for holding telephone channel

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5290204A (en) * 1976-01-26 1977-07-29 Nikko Electric Mfg Device for holding telephone channel

Also Published As

Publication number Publication date
JPS60236348A (en) 1985-11-25

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