JPH06133076A - Terminal network controller - Google Patents
Terminal network controllerInfo
- Publication number
- JPH06133076A JPH06133076A JP4279896A JP27989692A JPH06133076A JP H06133076 A JPH06133076 A JP H06133076A JP 4279896 A JP4279896 A JP 4279896A JP 27989692 A JP27989692 A JP 27989692A JP H06133076 A JPH06133076 A JP H06133076A
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- Prior art keywords
- polarity
- point
- line
- detecting
- signal
- 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.)
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ガスメータ等の端末を
接続すると共に通信回線を介してセンタと接続してセン
タと端末との自動検針、自動通報等の通信を実現する端
末網制御装置に関し、特にノーリンギング通信サービス
の電話回線との網制御に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal network control device for connecting a terminal such as a gas meter and the like to a center via a communication line to realize communication such as automatic meter reading and automatic notification between the center and the terminal. In particular, it relates to network control with a telephone line of a no ringing communication service.
【０００２】[0002]
【従来の技術】ノーリンギング通信は、電話回線の極性
が反転することで開始する。従って、端末網制御装置
は、一般的に極性の反転や復旧したことを検出する極性
検出手段とマイコン等で実現される制御手段等で構成さ
れている。そして、極性検出手段としては、次のような
技術が用いられている。2. Description of the Related Art No-ringing communication starts when the polarity of a telephone line is reversed. Therefore, the terminal network control device is generally composed of a polarity detection means for detecting the inversion or restoration of the polarity and a control means realized by a microcomputer or the like. The following techniques are used as the polarity detecting means.
【０００３】第１の例は、特公平２−２７８９５７号公
報に示す例であり、極性の変化時にコンデンサに回線電
圧が充放電されるようにして検出する手段である。ま
た、端末網制御装置に電話回線を接続するにあたり極性
を調べて接続する手間を省くため極性反転、復旧のどち
らの変化も検出しパルス状の検出信号を出力するもので
ある。そして回線と極性検出手段が全波整流回路等にて
絶縁されない手段のため、フォトカプラで極性検出手段
と制御手段を分離する手段がとられている。The first example is the example shown in Japanese Patent Publication No. 2-278957, which is means for detecting the line voltage by charging and discharging the capacitor when the polarity changes. In addition, in order to save the trouble of checking the polarity and connecting when connecting the telephone line to the terminal network control device, both changes of polarity reversal and restoration are detected and a pulsed detection signal is output. Since the line and the polarity detecting means are not insulated by a full-wave rectifier circuit or the like, a means for separating the polarity detecting means and the control means by a photo coupler is adopted.
【０００４】第２の例は、特公平３−１４８９４３号公
報に示す例であり、電話回線の端子間を高抵抗で接続し
その中点をアース電位として電話回線の各端子の電位を
トランジスタで検出し極性を判定するものである。従っ
て、極性が変化したか否かは制御手段が電話回線の２つ
の端子（Ｌ１、Ｌ２）の電位の変化をみて判定する手段
をとっている。The second example is an example shown in Japanese Examined Patent Publication No. 3-148943, in which terminals of the telephone line are connected with a high resistance and the midpoint thereof is used as a ground potential, and the potential of each terminal of the telephone line is a transistor. The polarity is detected and the polarity is determined. Therefore, the control means determines whether or not the polarity has changed by observing changes in the potentials of the two terminals (L1, L2) of the telephone line.
【０００５】第３の例は、特公平４−１１９０５１号公
報に示す例であり、全波整流回路の直流出力側を基準に
交流入力側の電圧極性を検出するものである。任意の時
点における極性を制御手段が判定できる。また、第２の
例と同様、極性が変化したか否かは制御手段にて判定す
る。A third example is an example shown in Japanese Patent Publication No. 4-119051, which detects the voltage polarity of the AC input side with reference to the DC output side of the full-wave rectifier circuit. The control means can determine the polarity at any time. Further, similarly to the second example, the control means determines whether or not the polarity has changed.
【０００６】ノーリンギング通信のための端末網制御装
置には自動発信して通信する機能も具備している。自動
発信する場合、１６Ｈz ７５Ｖ交流信号であるベル鳴動
信号（呼出信号）を受信していないことを確認する必要
があり、この呼出信号を検出する呼出信号検出手段が具
備されている。そして、呼出信号検出手段としては、次
のような技術が用いられている。The terminal network control device for no ringing communication also has a function of automatically transmitting and communicating. In the case of automatic transmission, it is necessary to confirm that the bell ringing signal (calling signal) which is a 16 Hz 75V AC signal is not received, and a calling signal detecting means for detecting this calling signal is provided. The following techniques are used as the calling signal detecting means.
【０００７】第４の例は、図８に示す例であり、コンデ
ンサで直流分をカットして呼出信号の交流分を平滑して
検出出力する手段である。極性検出手段とは別に具備さ
れている。A fourth example is an example shown in FIG. 8, which is means for cutting the direct current component with a capacitor to smooth the alternating current component of the calling signal and detecting and outputting it. It is provided separately from the polarity detecting means.
【０００８】第５の例は、特公平４−１１４５５１号公
報に示す例である。これは、呼出信号が連続した極性反
転復旧信号に類似していることから呼出信号受信時にも
極性検出手段から連続したパルス状の信号が出力される
ことを利用しており、制御手段がパルスの時間間隔等の
判定をすることで呼出信号と極性反転を判別する手段で
ある。The fifth example is shown in Japanese Patent Publication No. 4-114551. This utilizes that the polarity detecting means outputs a continuous pulse-like signal even when the calling signal is received because the calling signal is similar to the continuous polarity inversion recovery signal. It is a means for discriminating between a calling signal and polarity inversion by determining a time interval or the like.
【０００９】[0009]
【発明が解決しようとする課題】しかし、第１の例で示
した従来の技術は、極性の変化を確実に検出できるが、
回線との絶縁ができないためコストの高いフォトカプラ
等により制御手段と絶縁しなければならず、極性検出手
段と制御手段とが一体となったＬＳＩ化が困難である。However, although the conventional technique shown in the first example can reliably detect the change in polarity,
Since it cannot be insulated from the line, it must be insulated from the control means by a costly photocoupler or the like, which makes it difficult to form an LSI in which the polarity detection means and the control means are integrated.
【００１０】第２の例と第３の例は、回線との絶縁は可
能で第１の例に比べ回路が簡単であるが、電話回線の２
つの端子（Ｌ１、Ｌ２）の電位の変化をみて判定する手
段であるため制御手段のマイコンのプログラム等が第１
の例に比べ複雑となる。In the second and third examples, insulation from the line is possible and the circuit is simpler than that of the first example.
The program of the microcomputer of the control means is the first because it is a means for judging the change in the potential of the two terminals (L1, L2).
It is more complicated than the example.
【００１１】第４の例は、呼出信号検出専用の手段であ
るため極性検出手段と別に設けなければならないため回
路規模が大きくなる。The fourth example is a means dedicated to detecting a ringing signal and must be provided separately from the polarity detecting means, resulting in a large circuit scale.
【００１２】第５の例は、極性検出手段と呼出信号検出
手段とを兼ね備えたものである。第１の例に比べ回路は
簡単であるが回線の瞬断等を極性反転とみなす。また、
１つの検出信号の波形の形から制御手段が極性変化か呼
出信号かを判定しなければならないため制御手段のマイ
コンプログラム等が複雑となる。The fifth example has both polarity detecting means and ringing signal detecting means. Although the circuit is simpler than the first example, instantaneous disconnection of the line is regarded as polarity inversion. Also,
Since it is necessary for the control means to judge whether the polarity change or the calling signal is determined from the shape of the waveform of one detection signal, the microcomputer program of the control means becomes complicated.
【００１３】そこで、本発明の第１の目的は、回線との
絶縁が不要で且つ回路が簡単で回線の瞬断や回線電圧が
変化しただけでは極性反転とみなさず、誤動作の無い端
末網制御装置を提供することを第１の目的とする。Therefore, a first object of the present invention is to control a terminal network which does not need to be insulated from the line, is simple in circuit, is not regarded as polarity reversal even if the line is momentarily cut or the line voltage is changed, and there is no malfunction. A first object is to provide a device.
【００１４】第２の目的は、呼出信号を極性反転とみな
さず、しかしながら呼出信号を受信しているか否かの判
定が可能な端末網制御装置を提供することにある。A second object of the present invention is to provide a terminal network control device which does not regard the calling signal as polarity inversion but can judge whether or not the calling signal is received.
【００１５】[0015]
【課題を解決するための手段】そして上記第１の目的を
達成するために、本発明は、全波整流回路の交流入力側
に電話回線を接続する全波整流型接続手段と、全波整流
回路の直流出力側の電圧変化を検出する回線電圧検出手
段と、全波整流回路の直流出力側を基準に交流入力側の
電圧極性を検出する極性検出手段と、前記回線電圧検出
手段により電圧変化を検出した時、前記極性検出手段に
より極性反転が生じたか否かを検出する極反判定手段と
を備えたものである。In order to achieve the first object, the present invention provides a full-wave rectification type connecting means for connecting a telephone line to an AC input side of a full-wave rectification circuit, and a full-wave rectification. Line voltage detecting means for detecting a voltage change on the DC output side of the circuit, polarity detecting means for detecting a voltage polarity on the AC input side with reference to the DC output side of the full-wave rectifier circuit, and voltage change by the line voltage detecting means. And a polarity determination means for detecting whether or not polarity inversion has occurred by the polarity detection means.
【００１６】また、第２の目的を達成するために、回線
電圧検出手段を緩慢な電圧変化のみ検出するようにし、
極性検出手段から出力される電圧極性の変化を検出して
ベル鳴動信号を検出する極性判定利用型呼出信号検出手
段を備えたものである。In order to achieve the second object, the line voltage detecting means detects only a slow voltage change,
It is provided with a polarity determination utilization type call signal detecting means for detecting a bell ringing signal by detecting a change in voltage polarity output from the polarity detecting means.
【００１７】[0017]
【作用】本発明の端末網制御装置は、全波整流型接続手
段の直流側の回線電圧が０Ｖになり再び４８Ｖとなると
いった回線電圧の変化を回線電圧検出手段が検出した
時、極反判定手段が動作し極性検出手段により極性の変
化が生じたかを検出する。In the terminal network control device of the present invention, when the line voltage detecting means detects a change in the line voltage such that the line voltage on the DC side of the full-wave rectifying type connecting means becomes 0 V and becomes 48 V again, the extreme determination is made. The means operates and the polarity detecting means detects whether a change in polarity has occurred.
【００１８】また、緩慢な電圧の変化のみ検出する回線
電圧検出手段は、変化の速い呼出信号を受信した時には
反応しない。しかし、極性検出手段は呼出信号に反応す
るため、極性判定利用型呼出信号検出手段は極性検出手
段の出力のみ判定すればよい。Further, the line voltage detecting means for detecting only a slow voltage change does not react when receiving a ringing signal having a fast change. However, since the polarity detection means reacts to the ringing signal, the polarity determination utilization type ringing signal detection means only needs to determine the output of the polarity detection means.
【００１９】[0019]
【実施例】以下、本発明の第１の実施例について、図
１、図２、図３、図４にもとづいて説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. 1, 2, 3 and 4.
【００２０】図１は、本発明の端末網制御装置の構成を
説明する図である。１は本発明の端末網制御装置で、電
話回線に接続する端子Ｌ１、Ｌ２を有し、ダイオードＤ
１からＤ４から成るブリッジ回路の交流側がＬ１、Ｌ２
に接続される全波整流接続手段２と、ブリッジ回路の直
流出力側Ａ点の電圧変化を検出しＢ点に出力する回線電
圧検出手段４と、ブリッジ回路の直流出力側を基準とし
てブリッジ回路の交流入力側Ｃ点の電位を比較しＤ点に
出力する極性検出手段３と、回線電圧検出手段４と極性
検出手段３より極性反転があったか電話回線の切断ある
いは瞬断により電話回線の電圧が変化しただけなのかを
判定する極反判定手段５で構成される。図２は、回線電
圧検出手段４の概念を示すための回路の一例であり、Ａ
点の電位が所定より高い時ダイオードＺＤ１がオンにな
りＢ点の電位が上がるように構成されている。抵抗Ｒ
１、Ｒ２は電話回線の直流ループ回路を閉結、半閉結さ
せない十分な高抵抗を有するものとする。図３は、極性
検出手段３の概念を示すための回路の一例であり、回線
との絶縁をするためのダイオードＤ５と、Ｃ点の電位が
高い場合トランジスタＴＲ１をオンになるように構成し
たものであり、トランジスタＴＲ１がオンの時、Ｄ点の
出力がＬレベルで出力される。但しＲ３、Ｒ４、Ｒ５は
電話回線の直流ループ回路を閉結、半閉結させない十分
な高抵抗を有するものとする。そして、極反判定手段５
はマイコン等で実現するものとする。FIG. 1 is a diagram for explaining the configuration of the terminal network control apparatus of the present invention. 1 is a terminal network control device of the present invention, which has terminals L1 and L2 connected to a telephone line, and a diode D
AC side of the bridge circuit consisting of 1 to D4 is L1, L2
A full-wave rectification connection means 2 connected to the bridge circuit, a line voltage detection means 4 for detecting a voltage change at point A on the DC output side of the bridge circuit and outputting it to point B, and a DC output side of the bridge circuit as a reference. Polarity detection means 3 for comparing the potentials at point C on the AC input side and outputting the result to point D. Line voltage detection means 4 and polarity detection means 3 Whether there was polarity reversal. It is composed of the extreme determination means 5 for determining whether or not it is only done. FIG. 2 is an example of a circuit for showing the concept of the line voltage detecting means 4.
When the potential of the point is higher than a predetermined value, the diode ZD1 is turned on and the potential of the point B is increased. Resistance R
It is assumed that 1 and R2 have sufficiently high resistance so as not to close or semi-close the DC loop circuit of the telephone line. FIG. 3 is an example of a circuit for showing the concept of the polarity detection means 3, which is configured to turn on the diode D5 for insulating the line and the transistor TR1 when the potential at the point C is high. Therefore, when the transistor TR1 is on, the output at the point D is output at the L level. However, it is assumed that R3, R4, and R5 have sufficiently high resistance so as not to close or semi-close the DC loop circuit of the telephone line. And the extreme determination means 5
Shall be realized by a microcomputer or the like.
【００２１】この第１の実施例の動作について、図４を
用いて説明する。図４は、極性反転が生じた時における
Ａ、Ｂ、Ｃ、Ｄの各点の信号波形を示す図である。極性
反転前のＬ１、Ｌ２はＬ１を基準にＬ２が−４８Ｖであ
るとする。従って、Ｌ２の電位は端末網制御装置のグラ
ンド電位とほぼ等しくＣ点は、４８Ｖとなっている。従
って、極性検出手段３はＴＲ１がオン状態となっており
Ｄ点にはＬレベルが出力されている状態である。また、
極反判定手段５は、この時のＤ点のレベル状態Ｅを記憶
しておくものとする。さて、電話回線のＬ１、Ｌ２の極
性が反転するとＡ点には全波整流型接続手段２を介する
ためパルス状の信号が現れる。また、Ｃ点は０Ｖへ変化
する。従って、回線電圧検出手段４はＢ点にパルス状の
信号を出力し、極性検出手段３はＴＲ１がオフとなるた
めＨレベルへと変化する。極反判定手段５は、Ｂ点の信
号のパルス状の立ち上がりを検出すると、Ｄ点をチェッ
クする。Ｄ点と極反判定手段５が記憶しているレベルの
状態（ＥとＦ）が異なる場合、極性反転があったものと
判断する。電話回線が瞬断された場合回線電圧検出手段
はＢ点にパルス状の信号を出力するが、Ｄ点のレベルは
極反判定手段５が記憶している状態と変化しないため、
極反判定手段５は極性反転とは判断しない。電話回線が
切断された場合は、回線電圧検出手段４の出力がＬレベ
ルになったままＨレベルにならないため、この場合も極
性反転と判断しない。The operation of the first embodiment will be described with reference to FIG. FIG. 4 is a diagram showing signal waveforms at points A, B, C, and D when polarity inversion occurs. Regarding L1 and L2 before polarity reversal, it is assumed that L2 is -48V based on L1. Therefore, the potential of L2 is almost equal to the ground potential of the terminal network control device, and the point C is 48V. Therefore, the polarity detecting means 3 is in a state in which TR1 is in the ON state and the L level is output to the point D. Also,
The extreme anti-judgment means 5 stores the level state E at the point D at this time. Now, when the polarities of L1 and L2 of the telephone line are reversed, a pulse-like signal appears at the point A through the full-wave rectification type connecting means 2. Further, the point C changes to 0V. Therefore, the line voltage detecting means 4 outputs a pulsed signal to the point B, and the polarity detecting means 3 changes to the H level because TR1 is turned off. When the pulse-like rising of the signal at the point B is detected, the extreme-revolution determining means 5 checks the point D. When the point D and the state (E and F) of the level stored in the extreme determination unit 5 are different, it is determined that the polarity has been inverted. When the telephone line is momentarily cut off, the line voltage detection means outputs a pulsed signal to the point B, but the level at the point D does not change from the state stored in the extreme reversal determination means 5,
The reciprocity determination means 5 does not determine that the polarity is reversed. When the telephone line is disconnected, the output of the line voltage detecting means 4 remains at the L level and does not become at the H level. Therefore, in this case also, the polarity inversion is not judged.
【００２２】次に本発明の第２の実施例について、図
５、図６、図７にもとづいて説明する。Next, a second embodiment of the present invention will be described with reference to FIGS. 5, 6 and 7.
【００２３】図５は、第２の実施例を説明するための端
末網制御装置１の構成を説明する図である。第１の実施
例に極性判定利用型呼出信号検出手段６を付加した以外
は同じ構成となっている。この極性判定利用型呼出信号
検出手段６は、極反検出手段５と同様にマイコン等で実
現するものとする。図６は、回線電圧検出手段４に遅延
回路７を設けたものである。この遅延回路７は、１６Ｈ
z の呼出信号の周期６２.5ｍｓ程度でＡ点の信号が繰り
返し４８Ｖになった場合コンデンサＣ１に充電された電
圧が放電されずＢ点の電位は常にＨレベルなるようにし
たものである。また、ノーリンギング通信の場合は、こ
の呼出信号の周期より長い時間で極性変化が生じるため
ノーリンギング通信の極性反転に対してはＢ点の電位が
変化するように設定されているものとする。FIG. 5 is a diagram for explaining the configuration of the terminal network control device 1 for explaining the second embodiment. The configuration is the same as that of the first embodiment except that the polarity-determination-using paging signal detecting means 6 is added. The polarity determination utilization type call signal detection means 6 is realized by a microcomputer or the like as in the extreme-polarity detection means 5. In FIG. 6, the line voltage detecting means 4 is provided with a delay circuit 7. This delay circuit 7 has 16H
When the signal at the point A repeatedly reaches 48 V in the cycle of the ringing signal of z of about 62.5 ms, the voltage charged in the capacitor C1 is not discharged and the potential at the point B is always at the H level. Further, in the case of no ringing communication, the polarity changes in a time longer than the cycle of the ringing signal, so that it is assumed that the potential at the point B is changed with respect to the polarity reversal of the no ringing communication.
【００２４】この第２の実施例の動作について図７を用
いて説明する。図７は、呼出信号を受信した時における
Ａ、Ｂ、Ｃ、Ｄの各点の信号波形を示す図である。第１
の実施例と同様呼出信号受信前のＬ１、Ｌ２はＬ１を基
準にＬ２が−４８Ｖであるとする。従って、Ｌ２の電位
は端末網制御装置のグランド電位とほぼ等しくＣ点は、
４８Ｖとなっている。従って、極性検出手段３はＴＲ１
がオン状態となっておりＤ点にはＬレベルが出力されて
いる状態である。また、極反判定手段５は、この時のＤ
点のレベルの状態を記憶しておくものとする。さて、呼
出信号を受信するとＡ点には全波整流型接続手段２を介
するため７５Ｖ交流信号が全波整流された形の信号が現
れる。また、Ｃ点には７５Ｖ交流信号と同等の波形が出
力される。さて、回線電圧検出手段４は、遅延回路７が
存在するためＢ点にはパルス状の信号は出力しない。極
性検出手段３はＴＲ１が呼出信号に応じてオンオフする
ためＤ点にＨレベルとＬレベル信号を交互に出力する。
極反判定手段５は、Ｂ点の信号が変化しないため極性変
化とはみなさない。本発明の端末網制御装置１が発信す
る前に呼出信号を受信しているか否かをチェックする場
合、極性判定利用型呼出信号検出手段６を利用する。極
性判定利用型呼出信号検出手段６は、Ｄ点の信号変化の
みを検出して判定する。The operation of the second embodiment will be described with reference to FIG. FIG. 7 is a diagram showing signal waveforms at points A, B, C, and D when a call signal is received. First
Similarly to the embodiment described above, it is assumed that L1 and L2 before receiving the ringing signal are based on L1 and L2 is -48V. Therefore, the potential of L2 is almost equal to the ground potential of the terminal network controller, and the point C is
It is 48V. Therefore, the polarity detecting means 3 is TR1.
Is in the ON state and the L level is being output to the point D. In addition, the extreme determination means 5 is D at this time.
The state of the point level shall be stored. Now, when the ringing signal is received, a signal in which the 75V AC signal is full-wave rectified appears at the point A through the full-wave rectification type connecting means 2. A waveform equivalent to the 75V AC signal is output at point C. Now, the line voltage detecting means 4 does not output a pulsed signal to the point B because the delay circuit 7 exists. The polarity detecting means 3 alternately outputs the H level and L level signals to the point D because TR1 is turned on / off in response to the calling signal.
The anti-polarity determination means 5 does not consider the polarity change because the signal at the point B does not change. When checking whether or not a ringing signal is received before the terminal network control device 1 of the present invention transmits, the polarity determination utilization type ringing signal detecting means 6 is used. The polarity determination utilization type call signal detection means 6 detects and determines only the signal change at the point D.
【００２５】[0025]
【発明の効果】以上のように本発明の端末網制御装置に
よれば、次のような効果が得られる。 （１）回線との絶縁が不要で且つ回路が簡単で回線の瞬
断や回線電圧が変化しただけでは極性反転とみなさず、
誤動作の無い端末網制御装置の提供が可能である。 （２）呼出信号を極性反転とみなさず、呼出信号を極性
反転と区別して受信判定ができるためマイコンのソフト
ウェアが簡単となる。As described above, according to the terminal network control apparatus of the present invention, the following effects can be obtained. (1) Insulation from the line is not necessary and the circuit is simple, and it is not regarded as polarity reversal just by a momentary disconnection of the line or a change in the line voltage.
It is possible to provide a terminal network control device without malfunction. (2) Since the ringing signal is not regarded as the polarity inversion and the reception determination can be performed by distinguishing the ringing signal from the polarity inversion, the software of the microcomputer is simplified.
【図１】本発明の第１の実施例における端末網制御装置
のブロック構成図FIG. 1 is a block configuration diagram of a terminal network control device according to a first embodiment of the present invention.
【図２】同装置の電圧変化検出手段の回路例を示す図FIG. 2 is a diagram showing a circuit example of voltage change detection means of the same device.
【図３】同装置の極性検出手段の回路例を示す図FIG. 3 is a diagram showing a circuit example of polarity detection means of the device.
【図４】同装置の動作を説明する図FIG. 4 is a diagram explaining the operation of the device.
【図５】本発明の第２の実施例における端末網制御装置
のブロック構成図FIG. 5 is a block configuration diagram of a terminal network control device according to a second embodiment of the present invention.
【図６】同装置の電圧変化検出手段の回路例を示す図FIG. 6 is a diagram showing a circuit example of voltage change detection means of the device.
【図７】同装置の動作を説明する図FIG. 7 is a diagram for explaining the operation of the device.
【図８】従来の呼出信号検出の回路例を示す図FIG. 8 is a diagram showing a circuit example of a conventional ringing signal detection.
１ 端末網制御装置 ２ 全波整流型接続手段 ３ 極性検出手段 ４ 回線電圧検出手段 ５ 極反判定手段 ６ 極性判定利用型呼出信号検出手段 DESCRIPTION OF SYMBOLS 1 Terminal network control device 2 Full wave rectification type connection means 3 Polarity detection means 4 Line voltage detection means 5 Polarity determination means 6 Polarity determination utilization type call signal detection means
Claims (2)
続する全波整流型接続手段と、全波整流回路の直流出力
側の電圧変化を検出する回線電圧検出手段と、全波整流
回路の直流出力側を基準に交流入力側の電圧極性を検出
する極性検出手段と、前記回線電圧検出手段により電圧
変化を検出した時、前記極性検出手段により極性反転が
生じたか否かを検出する極反判定手段とを備えた端末網
制御装置。1. A full-wave rectification type connecting means for connecting a telephone line to an AC input side of the full-wave rectification circuit, a line voltage detecting means for detecting a voltage change on a DC output side of the full-wave rectification circuit, and a full-wave rectification. Polarity detection means for detecting the voltage polarity of the AC input side with reference to the DC output side of the circuit, and when the line voltage detection means detects a voltage change, the polarity detection means detects whether or not polarity inversion has occurred. A terminal network control device having a reciprocal determination means.
手段と、極性検出手段から出力される電圧極性の変化を
検出してベル鳴動信号を検出する極性判定利用型呼出信
号検出手段を備えた請求項１記載の端末網制御装置。2. A line voltage detecting means for detecting only a slow voltage change, and a polarity determination utilization type ringing signal detecting means for detecting a bell ringing signal by detecting a change in voltage polarity output from the polarity detecting means. The terminal network control device according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4279896A JP3057930B2 (en) | 1992-10-19 | 1992-10-19 | Terminal network controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4279896A JP3057930B2 (en) | 1992-10-19 | 1992-10-19 | Terminal network controller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06133076A true JPH06133076A (en) | 1994-05-13 |
| JP3057930B2 JP3057930B2 (en) | 2000-07-04 |
Family
ID=17617439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4279896A Expired - Fee Related JP3057930B2 (en) | 1992-10-19 | 1992-10-19 | Terminal network controller |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3057930B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07312659A (en) * | 1994-05-19 | 1995-11-28 | Nec Corp | Method and device for detecting polarity inversion |
-
1992
- 1992-10-19 JP JP4279896A patent/JP3057930B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07312659A (en) * | 1994-05-19 | 1995-11-28 | Nec Corp | Method and device for detecting polarity inversion |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3057930B2 (en) | 2000-07-04 |
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