JPS58137351A - Backup power source detecting circuit - Google Patents

Backup power source detecting circuit

Info

Publication number
JPS58137351A
JPS58137351A JP57020044A JP2004482A JPS58137351A JP S58137351 A JPS58137351 A JP S58137351A JP 57020044 A JP57020044 A JP 57020044A JP 2004482 A JP2004482 A JP 2004482A JP S58137351 A JPS58137351 A JP S58137351A
Authority
JP
Japan
Prior art keywords
backup power
redialing
voltage
redial
power supply
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.)
Granted
Application number
JP57020044A
Other languages
Japanese (ja)
Other versions
JPS6357986B2 (en
Inventor
Yoshio Sano
佐野　好男
Hideo Fukazawa
深沢　英夫
Makoto Yoshitoshi
吉利　誠
Yutaka Nishino
豊 西野
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.)
Fujitsu Ltd
Nippon Telegraph and Telephone Corp
Original Assignee
Fujitsu Ltd
Nippon Telegraph and Telephone 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 Fujitsu Ltd, Nippon Telegraph and Telephone Corp filed Critical Fujitsu Ltd
Priority to JP57020044A priority Critical patent/JPS58137351A/en
Publication of JPS58137351A publication Critical patent/JPS58137351A/en
Publication of JPS6357986B2 publication Critical patent/JPS6357986B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/26—Devices for calling a subscriber
    • H04M1/27—Devices whereby a plurality of signals may be stored simultaneously
    • H04M1/272—Devices whereby a plurality of signals may be stored simultaneously with provision for storing only one subscriber number at a time, e.g. by keyboard or dial
    • H04M1/2725—Devices whereby a plurality of signals may be stored simultaneously with provision for storing only one subscriber number at a time, e.g. by keyboard or dial using electronic memories

Landscapes

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

Abstract

PURPOSE:To prevent erroneous redialing, by detecting a backup power supply voltage, and inhibiting redialing operation when the detected voltage is less than a specific value. CONSTITUTION:When the charging voltage of a backup power source BUP is greater than a specific value, the output of a gate circuit G is at a low level and a transistor (TR) Q3 turns off. Therefore, when a dial key KRD is turned on after off-hook operation, a redialing signal RD is outputted from a TRQ2. On the other hand, when the voltage of the power source BUP is less than the specific value, the output of the gate circuit G is at a high level and the TRQ3 turns on. In this case, the TRQ2 is still off even when the key KRD is turned on, so no redialing signal RD is outputted. Further, the light emission of a light emitting diode LED is maintained to provide visible display for showing whether redialing is possible or not when the key KRD is turned on.

Description

【発明の詳細な説明】 本発明は、リダイヤル機能付電話機櫨二於いて、メモリ
パンク７ツプ電源電圧を検出して、リダイヤルの誤動作
を防止し得るよう（；シたバックアップ電源検出回路に
関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a backup power supply detection circuit for detecting a memory puncture in a telephone with a redial function to prevent redial malfunctions. It is.

リダイヤル機能付電話機は、発呼操作６二於けるダイヤ
ル番号をメモリ（＝記憶し、被呼者話中の場合ζ；、全
桁のダイヤル操作を行なうことなく、リダイヤルキーの
操作により、メモリからダイヤル番号を桁順（二続出し
て送出するものである。通常のダイヤル番号の送出は、
局給電６二より動作する電話機回路（二より行なわれる
ものであるが、ダイヤル番号を記憶するメモリにはバッ
クアップ電源が設けられ、オフフック時に局給電により
充電されるものである。従ってノ（ツクアップ電源の充
電電圧が充分でない場合、メモリの記憶内容の保証が得
られないので、リダイヤル操作によるダイヤル番号は、
誤番号となる可能性が大きくなる。A telephone with a redial function stores the dialed number in the call operation 62 in the memory (= memorizes it, and when the called party is busy The dialed number is sent out in digit order (two consecutive times).The normal sending of the dialed number is
The telephone circuit that operates from the station power supply 62 (this is done from 2), the memory that stores dial numbers is provided with a backup power supply, and is charged by the station power supply when off-hook. If the charging voltage is not sufficient, the contents of the memory cannot be guaranteed, so the number dialed by redial operation is
The possibility of an incorrect number increases.

本発明は、バックアップ電源電圧を検出し、所定の電圧
以下の場合には、リダイヤル動作が行なわれないよう１
二して、リダイヤルの誤動作を防止することを目的とす
るものである。以下実施例４一ついて詳細シニ説明する
。The present invention detects a backup power supply voltage and prevents a redial operation when the voltage is lower than a predetermined voltage.
Second, the purpose is to prevent redial malfunctions. Embodiment 4 will be explained in detail below.

図は本発明の実施例の要部回路図を示し、Ｋ１゜Ｋ２は
押釦ダイヤルのうちの一部のキー、ＫＲＤはりダイヤル
キー、Ｑ１〜Ｑ９はトランジスタ、Ｇはゲート回路、Ｄ
ｌはダイオード、ＢＵＰはバックアップ電源である。こ
のバックアップ電源ＢＵＰは局給電電圧ＰＷζ二より充
電され、図示しないメモリ等５：充電電圧を印加するも
のである。又トランジスタＱ４〜Ｑ６及びＱ７〜Ｑ９は
低群及び高群のうちの低群信号Ｚ、１　、Ｌ２の送出回
路のみを示し、例えばキーに１をオンとすることにより
低群信号Ｌ１　と図示しない高群信号とが組となって出
力され、周知の構成Ｃ；より２周波信号として交換局へ
送出される。The figure shows a circuit diagram of the main parts of the embodiment of the present invention, where K1 and K2 are some keys of the push button dial, KRD beam dial key, Q1 to Q9 are transistors, G is a gate circuit, and D
1 is a diode, and BUP is a backup power supply. This backup power supply BUP is charged by the local power supply voltage PWζ2, and is used to apply a charging voltage to a memory, etc. (not shown) 5. In addition, transistors Q4 to Q6 and Q7 to Q9 are only shown as a sending circuit for low group signals Z, 1, and L2 of the low group and high group. For example, by turning on the key 1, the low group signal L1 (not shown) is shown. The high group signal is output as a set, and sent to the exchange as a two-frequency signal using the well-known configuration C;.

バックアップ電源ＢＵＰの充電電圧が所定値以上であれ
ばゲート回路Ｇの出力はローレベルとなり、トランジス
タＱ３はオフとなる。従ってオフフック後リダイヤルキ
ーＫＲＤをオンとすると、トランジスタＱ４のエミッタ
・ペース間を介して局給電電圧ＰＷがトランジスタＱ１
．Ｑ２のベースに加えられ、トランジスタＱ２からロー
レベルのりダイヤル信号ＲＤが出力され、公知の構成に
より図示しないメモリ礪；記憶されたダイヤル番号の送
出制御が行なわれる。　　　　　岬 又バックアップ電源ＢＵＰの電圧が所定値以下であると
、ゲート回路Ｇの出力はへイレベルとなり、トランジス
タＱ５はオンとなる。この場合はりダイヤルキーＫＲＤ
をオンとしても、トランジスタＱ２はオフのままとなる
ので、リダイヤル信号ＨＤは出力されないことになる。If the charging voltage of the backup power supply BUP is equal to or higher than a predetermined value, the output of the gate circuit G becomes a low level, and the transistor Q3 is turned off. Therefore, when redial key KRD is turned on after off-hook, local power supply voltage PW is applied to transistor Q1 via the emitter and pace of transistor Q4.
．． A low level dialing signal RD is applied to the base of the transistor Q2, and a dial number stored in a memory (not shown) is controlled to be transmitted using a known configuration. When the voltage of the Misakimata backup power supply BUP is below a predetermined value, the output of the gate circuit G becomes a high level, and the transistor Q5 is turned on. In this case, the beam dial key KRD
Even if the transistor Q2 is turned on, the redial signal HD is not outputted because the transistor Q2 remains off.

即ちバックアップ電源ＢＵＰの電圧が低い場合は、リダ
イヤル操作は禁止状態となり、リダイヤルの誤動作が防
止される。That is, when the voltage of the backup power supply BUP is low, the redial operation is prohibited, and a redial malfunction is prevented.

又点線で示すよう１二発光ダイオードＬＥＤを接続すれ
ば、リダイヤルキーＫＲＤをオンとしたとき、リダイヤ
ル可能であるか否かの可視表示を行なうことができる。Furthermore, if twelve light emitting diodes (LEDs) are connected as shown by dotted lines, when the redial key KRD is turned on, it is possible to visually display whether or not redialing is possible.

即ち発光ダイオードＬＥＤが発光すれぼりダイヤル可能
であるが、発光しなければリダイヤル不可能であるから
、再度押釦ダイヤルＣ二よりダイヤル操作すれば良いこ
とになる。That is, dialing is possible when the light emitting diode LED is barely emitting light, but redialing is not possible unless it emits light, so it is only necessary to operate the dial again using push button dial C2.

又低群信号及び高群信号の送出回路や、リダイヤル信号
ＥＤの送出回路等は集積回路化されるものであり、従っ
てビン端子数（二制約が生じるが、本発明によれば、低
群用の端子の一つと、リダイヤル用の端子との間にリダ
イヤルキーＲＫＤを接続するものであるから、特別のビ
ン端子を用意する必要はない。In addition, the low group signal and high group signal sending circuits, the redial signal ED sending circuit, etc. are integrated circuits, so there is a constraint on the number of bin terminals (2), but according to the present invention, the low group signal Since the redial key RKD is connected between one of the terminals of the terminal and the redial terminal, there is no need to prepare a special pin terminal.

以上説明したように、本発明は、低群信号の送出回路の
一つ例えばトランジスタＱ４〜Ｑ６からなる低群信号Ｌ
１の送出回路の入力端子と、トランジスタＱ１．Ｑ２か
らなるリダイヤル信号ＲＤの送出回路の入力端子との間
砿二リダイヤルキーＫＲＤを接続し、ダイヤル番号を記
憶するメモリのバックアップ電源ＢＵＰの電圧が所定値
以下の場合にオンとなるトランジスタＱ３をリダイヤル
信号ＲＤ　の送出回路の入力端子に接続したことＣ：よ
り、バックアップ電源ＢＵＰの電圧が低くダイヤル番号
記憶用メモリの動作が保証で、きない場合（ニリダイヤ
ル動作を禁止させることができ、リダイヤルの誤動作を
防止することができる。As explained above, the present invention provides a low group signal L which is made up of one of the low group signal sending circuits, for example, transistors Q4 to Q6.
1 and the input terminal of the transmission circuit of transistor Q1. The redial key KRD is connected between the input terminal of the redial signal RD transmission circuit consisting of Q2, and the transistor Q3 is redialed, which turns on when the voltage of the backup power supply BUP of the memory that stores the dial number is below a predetermined value. C: If the voltage of the backup power supply BUP is low and the operation of the memory for storing dial numbers is not guaranteed (the redial operation can be prohibited and redial malfunctions), the voltage of the backup power supply BUP is low. can be prevented.

又前述の如く、各送出回路の入力端子を利用するので、
集積回路化した場合のビン端子数の増加はなく、簡単な
構成（二より、リダイヤル機能付電話機−一於けろりダ
イヤル誤動作を確実に防止することができる。Also, as mentioned above, since the input terminals of each sending circuit are used,
There is no increase in the number of pin terminals when integrated circuits are used, and the structure is simple (Secondly, redial function telephones can reliably prevent redial dialing errors).

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

図は本発明の実施例の要部回路図である。 Ｑ１〜Ｑ９はトランジスタ、　ＢＵＰはバックアップ電
源、Ｋ１．に２は押釦ダイヤルのキー、ＫＲＤはリダイ
ヤルキー、Ｇはゲート回路、ＲＤはりダイヤル信号、Ｐ
Ｗは局給電電圧、Ｌｌ、Ｌ２は低群信号、ＬＥＤは発光
ダイオードである。The figure is a main circuit diagram of an embodiment of the present invention. Q1 to Q9 are transistors, BUP is a backup power supply, K1. 2 is the push button dial key, KRD is the redial key, G is the gate circuit, RD beam dial signal, P
W is a local power supply voltage, Ll and L2 are low group signals, and LED is a light emitting diode.

Claims (1)

【特許請求の範囲】[Claims] ダイヤル番号を記憶するメモリと核メモリのバックアッ
プ電源とを有するリダイヤル機能付電話機に於いて、低
群信号の送出回路の一つの入力端子とりダイヤル信号送
出回路の入力端子との間にリダイヤルキーを接続し、前
記リダイヤル信号送出回路の入力端子に、前記バックア
ップ電源の電圧が所定値以下でオンとなるトランジスタ
を接続したことを特徴とするバックアップ電源検出回路
。In a telephone with a redial function that has a memory for storing dial numbers and a backup power source for the core memory, a redial key is connected between one input terminal of the low group signal transmission circuit and the input terminal of the dial signal transmission circuit. A backup power supply detection circuit characterized in that a transistor that turns on when the voltage of the backup power supply is equal to or less than a predetermined value is connected to an input terminal of the redial signal sending circuit.
JP57020044A 1982-02-10 1982-02-10 Backup power source detecting circuit Granted JPS58137351A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57020044A JPS58137351A (en) 1982-02-10 1982-02-10 Backup power source detecting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57020044A JPS58137351A (en) 1982-02-10 1982-02-10 Backup power source detecting circuit

Publications (2)

Publication Number Publication Date
JPS58137351A true JPS58137351A (en) 1983-08-15
JPS6357986B2 JPS6357986B2 (en) 1988-11-14

Family

ID=12016052

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57020044A Granted JPS58137351A (en) 1982-02-10 1982-02-10 Backup power source detecting circuit

Country Status (1)

Country Link
JP (1) JPS58137351A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61139057U (en) * 1985-02-18 1986-08-28
JPS62299161A (en) * 1986-06-18 1987-12-26 Rinnai Corp House information transmitter
JPS62299162A (en) * 1986-06-18 1987-12-26 Rinnai Corp House information transmitter

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5368106A (en) * 1976-11-30 1978-06-17 Nec Corp Automatic dialing unit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5368106A (en) * 1976-11-30 1978-06-17 Nec Corp Automatic dialing unit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61139057U (en) * 1985-02-18 1986-08-28
JPS62299161A (en) * 1986-06-18 1987-12-26 Rinnai Corp House information transmitter
JPS62299162A (en) * 1986-06-18 1987-12-26 Rinnai Corp House information transmitter
JPH0457265B2 (en) * 1986-06-18 1992-09-11 Rinnai Kk

Also Published As

Publication number Publication date
JPS6357986B2 (en) 1988-11-14

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