JPS58205393A - Subscriber circuit - Google Patents
Subscriber circuitInfo
- Publication number
- JPS58205393A JPS58205393A JP8788982A JP8788982A JPS58205393A JP S58205393 A JPS58205393 A JP S58205393A JP 8788982 A JP8788982 A JP 8788982A JP 8788982 A JP8788982 A JP 8788982A JP S58205393 A JPS58205393 A JP S58205393A
- Authority
- JP
- Japan
- Prior art keywords
- current
- subscriber
- circuit
- contact
- cut
- 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
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
- H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker
- H04Q3/52—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker using static devices in switching stages, e.g. electronic switching arrangements
- H04Q3/521—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker using static devices in switching stages, e.g. electronic switching arrangements using semiconductors in the switching stages
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Interface Circuits In Exchanges (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、空間分割型゛嵯子交換愼（おいて使用される
加入者回路に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a subscriber circuit used in a space-divided network switching system.
空間分割型電子交換機においては、〃α人者線路は、通
話路スイッチ内の１次スイッチに接続され、通話路には
上記１次スイッチおよび後段の複数のスイッチ接点を介
して出側のトランクに接続されて通話路が形成される。In a space-division type electronic exchange, the α personal line is connected to the primary switch in the communication path switch, and the communication path is connected to the outgoing trunk via the primary switch and multiple switch contacts in the subsequent stage. They are connected to form a communication path.
上記１次スイッチは、常時は１対のカットオフ接点を通
して１対の加入者線路の一方を走査マトリックスに接続
し他の一方は接地している。そして上記走査マド“リツ
クスを介して加入者線走査回路によシ走査さｎていて加
入者線路のループ状態が監視される。電話憬の７ツクオ
フによる発呼は、加入者線路をループにするから、該ル
ープ状態が走査回路で検出される。The primary switch normally connects one of the pair of subscriber lines to the scanning matrix through a pair of cut-off contacts and the other to ground. The subscriber line is then scanned by the subscriber line scanning circuit through the scanning matrix to monitor the loop status of the subscriber line.A call originating from the 7-turn off of the telephone loop causes the subscriber line to loop. , the loop state is detected by a scanning circuit.
交換機が前記複数のスイッチを動作させて＊、Ｖ路を形
成した後は、前記１次スイッチのカットオフ接点は開成
される。走査マトリックスには抵抗器が使用されている
から、例えは商用電力機との接触等によシ加入者線路か
ら異常電圧または磁流が印加される゛と走査マトリック
ス内の抵抗器等を焼損するおそれがある。勿論加入者＋
１ｉｌｉ路と１次スイッチとの間には、フユ−ズ等の保
護回路が挿入されている。しかし、フユーズは瞬間的な
大−流の遮断には適するが持続的な異常１！４流を遮断
するには適さないため、７ユーズを溶断させる′邂流１
奥以下の持続的な異常電流の流入によって走査マトリッ
クスの抵抗器等が焼損する。上記保護回路を一定値以上
の電流で高抵抗となる電流保護素子によって構成するこ
とも考えられるが、このような電流保護素子は平常時に
おける抵抗が完全に０ではなく、通話損失を生じるから
採用できない。After the exchange operates the plurality of switches* to form the V path, the cut-off contact of the primary switch is opened. Since resistors are used in the scanning matrix, if an abnormal voltage or magnetic current is applied from the subscriber line, for example due to contact with a commercial power machine, the resistors in the scanning matrix will burn out. There is a risk. Of course subscribers +
A protection circuit such as a fuse is inserted between the primary switch and the primary switch. However, although fuses are suitable for blocking instantaneous large currents, they are not suitable for blocking persistent abnormal flows.
The resistors of the scanning matrix will burn out due to the continuous abnormal current flowing below the back. It is possible to configure the above protection circuit with a current protection element that has high resistance when the current exceeds a certain value, but such a current protection element is not used because the resistance under normal conditions is not completely zero and causes call loss. Can not.
本発明の目的は、上述の従来の欠点を解決し、持続的な
異常電流が流入した場合においても走査マトリックス等
を焼損させない加入者回路を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned conventional drawbacks and to provide a subscriber circuit that does not burn out the scanning matrix etc. even when a continuous abnormal current flows into the subscriber circuit.
本発明の加入者回路は、１対の加入者線路に空間分ｉ！
Ｊｌ型通話路スイッチの１対のカットオフ接点を通して
接続され、該１対のカットオフ接点の一方は接地され他
の一方は加入者線走査回路の走査マトリックスに接続さ
れていて、加入者線路のループが前記加入者線走査回路
によって検出される加入者回路において、前記走査マト
リックスに接続され走力のカットオフ接点と走査マトリ
ックスとの間に一定値以上の電流で高抵抗となる電流保
護素子を直列に挿入したことを特徴とする。The subscriber circuit of the present invention includes a pair of subscriber lines having a spatial division i!
The connection is made through a pair of cut-off contacts of the Jl-type communication path switch, one of the pair of cut-off contacts being grounded and the other connected to the scanning matrix of the subscriber line scanning circuit. In the subscriber circuit whose loop is detected by the subscriber line scanning circuit, a current protection element is connected to the scanning matrix and becomes high resistance at a current exceeding a certain value between the scanning power cut-off contact and the scanning matrix. It is characterized by being inserted in series.
次に、本発明について、図面を参照して詳細に説明する
。Next, the present invention will be explained in detail with reference to the drawings.
図は、本発明の一実施例を示す回路図である。The figure is a circuit diagram showing one embodiment of the present invention.
すなわち、加入者電話機ｌおよび２は、それぞれ１対の
加入者線路２１ａ、２１ｂおよび２２ａ。That is, subscriber telephones 1 and 2 each have a pair of subscriber lines 21a, 21b and 22a.
２２ｂおよび保護回路３を通して１次スイッチ５および
６に接続される。通話時には、１次スイッチ５および６
はそれぞれ後段の複数のスイッチ接点を介して出側のト
ランク回路７および８に＋に伏されて通話路が形成され
る。上記１次スイッチ５゜６および後段の複数のスイッ
チで通話路スイッチ４を構成している。そして、上記１
次スイッチ５，６の加入者線路側には、平常時閉成され
通話略形成時には開成される１対のカットオフ接点１８
ａ。22b and the protection circuit 3 to the primary switches 5 and 6. During a call, the primary switches 5 and 6
are connected to the outgoing trunk circuits 7 and 8 through a plurality of switch contacts at the subsequent stages, respectively, to form communication paths. The primary switch 5.6 and a plurality of subsequent switches constitute a communication path switch 4. And above 1
On the subscriber line side of the next switches 5 and 6, there is a pair of cut-off contacts 18 that are closed in normal times and opened when a call is almost formed.
a.
１８ｂおよび１９ｍ、１９ｂがそれぞれ接続されていて
、１８ｂ、１９ｂは、直接または複数の加入者に共通な
抵抗１２を介して接地される。カットオフ接点１８ｍと
走査マトリックス１３内の抵抗１４とは、′ｉｔ流保流
木Ｓ索子２４して接続する。18b and 19m, 19b are connected, respectively, and 18b, 19b is grounded directly or via a resistor 12 common to a plurality of subscribers. The cut-off contact 18m and the resistor 14 in the scanning matrix 13 are connected by means of an 'it-style driftwood S strand 24.
カットオフ接点１９ｍも同様に電流保護索子２５を通し
て走査マトリックス１３に接続される。電流保護索子２
４．２５は、例えばサーミスタで構成されていて、一定
値以上の電流が流れたとき高抵抗となる素子である。The cut-off contact 19m is likewise connected to the scanning matrix 13 through the current protection cable 25. Current protection rope 2
4.25 is an element that is composed of, for example, a thermistor, and becomes highly resistant when a current of a certain value or more flows.
走査マトリックス１３は、各加入者対応に１抵抗１４と
１５の直列接続回路を備えていて、その一端は前記１１
Ａ保ａ素子を介して前記カットオフ接点に接続され、他
の一端は電池の負極に接続されている。そして、抵抗１
４と１５との接続点は、ダイオード１６を介して走査回
路９の内蔵する駆動回Ｎ１１０に接続され、またダイオ
ード１７を介して読取９回路１１に接続されている。そ
して、例えば加入者電話機１がフックオフすると、大地
−抵抗１２−カットオフ接点１８ｂ−保躾回路３−加入
者線路２１ｂ−電話機１−加入者線路２１＆−保護回路
３−カットオフ接点１８ｍ−電流保護索子２４−抵抗１
４−抵抗１５−＃Ｌ池（負極）の経路で一部の４流が流
れ、他の一部のｔａはダイオード１６．１７を介して駆
動回路１０又は読取シ回路１１に分流する。該分流電流
は、走査装置９が駆動されている場合は、読取り回路１
１Ｋｆｉれ、駆動されていない場合は駆動回路１０へ流
れる。The scanning matrix 13 includes a series connection circuit of one resistor 14 and one resistor 15 for each subscriber, one end of which is connected to the above-mentioned 11.
It is connected to the cut-off contact via the A protection element, and the other end is connected to the negative electrode of the battery. And resistance 1
The connection point between 4 and 15 is connected via a diode 16 to a driving circuit N110 included in the scanning circuit 9, and is also connected via a diode 17 to a reading 9 circuit 11. For example, when the subscriber telephone 1 hooks off, the ground - resistor 12 - cutoff contact 18b - maintenance circuit 3 - subscriber line 21b - telephone 1 - subscriber line 21 & - protection circuit 3 - cutoff contact 18m - current protection Cable 24-resistance 1
Some of the 4 currents flow through the path of 4-resistor 15-#L (negative electrode), and the other part of ta is shunted to the drive circuit 10 or the reading circuit 11 via diodes 16 and 17. The shunt current flows through the reading circuit 1 when the scanning device 9 is activated.
1Kfi, and if it is not being driven, it flows to the drive circuit 10.
この電流切替によシ図示されていない制御装置が加入者
電話機１からの発呼を検出する。該制ａｌ装置は、加入
者電話機１からの発呼を検出すると、カットオフ接点１
８ａ、１８ｂを開き、通話路スイッチ４内の各段のスイ
ッチを閉じて７ＪＩＪ入者ｗＬ話機１をトランク回路７
に接続する。平常時においては、電流保護素子２４．２
５等に流れる％流ｆよ僅少であり、電流保護索子２４．
２５等の抵抗１直は小さい。従って、上述の動作は従来
と同様に行なわれる。しかし、例えば加入省線路２１ａ
に、′１力線が接触したり、又は誘尋によって高電圧２
３が持続的に印加され、保護回路３の動作１＝以下の電
流が持続的に流入したときは、電流保護索子２４の抵抗
値が大となって流入電流を抑圧し、抵抗１４．１５等の
焼損を防止することができるという効果がある。By this current switching, a control device (not shown) detects a call from the subscriber telephone 1. When the control device detects a call from subscriber telephone 1, cutoff contact 1 is activated.
8a and 18b, close the switches at each stage in the communication path switch 4, and connect the 7JIJ subscriber wL phone 1 to the trunk circuit 7.
Connect to. Under normal conditions, the current protection element 24.2
The current protection cord 24.
A single resistor such as 25 is small. Therefore, the above-mentioned operation is performed in the same manner as before. However, for example, the joining ministry line 21a
When the '1 line of force comes into contact with the
3 is continuously applied and a current below operation 1 of the protection circuit 3 continuously flows in, the resistance value of the current protection cable 24 becomes large and suppresses the inflow current, and the resistance value of the protection circuit 3 increases This has the effect of preventing burnout such as.
以上のように、本発明においては、加入者ごとに、走査
マトリックスとカットオフ接点の嘔］に−定値以上の電
流で高抵抗となる一流保護素子を直ダ１ｊに挿入した構
成としたから、外部からの持続的な異常Ｉｔ流が流入し
た場合においても走査マトリックス内の抵抗等の焼損を
防止し、構成部品を保禮する効果を有する。As described above, in the present invention, for each subscriber, a first-class protection element which becomes high resistance at a current exceeding a fixed value is inserted in the direct line 1j in the scanning matrix and the cut-off contact. Even when a continuous abnormal It flow flows in from the outside, it has the effect of preventing burnout of the resistors in the scanning matrix and protecting the component parts.
図は本発明の一実施例を示す回路図である。
図において、１，２・・・加入者電話・凌、３・・・保
護回路、４・・・通話路スイッチ、５，６・・・１次ス
イッチ、７．８・・・トランク回路、９・・・走置回路
、ｌＯ・・・駆動回路、１１・・・銃取り回路、１２・
・・抵抗、１３・・・走置マトリックス、１４．１５・
・・抵抗、１６．１７・・・ダイオード、１８ ｍ、
１８ ｂ、 １９ ａ、 １９ ｂ・・・カット
オフ接点、２１ａ、２１ｂ、２２ｍ、２２ｂ・・・加入
者線路、２３・・・高電圧、２４．２５・・・電流法−
素子。
代理人 弁理士 住 １）俊 宗The figure is a circuit diagram showing one embodiment of the present invention. In the figure, 1, 2...Subscriber telephone line, 3...Protection circuit, 4...Communication path switch, 5, 6...Primary switch, 7.8...Trunk circuit, 9 ...travel circuit, lO... drive circuit, 11... gun retrieval circuit, 12.
...Resistance, 13...Translation matrix, 14.15.
...Resistance, 16.17...Diode, 18 m,
18 b, 19 a, 19 b...Cutoff contact, 21a, 21b, 22m, 22b...Subscriber line, 23...High voltage, 24.25...Current method-
element. Agent Patent Attorney: 1) Toshi Sou
Claims (1)
対のカットオフ接点を通して接続され、該１によって検
出される加入者回路において、前記走査マトリックスに
接続された方のカットオフ接点と走査マトリックスとの
間に一定値以上の′磁流で高抵抗となる電流保値素子を
直列に挿入したことを特徴とする加入者回路。・1, one of the space division type communication path switches is installed on the subscriber line of i.
In a subscriber circuit connected through a pair of cut-off contacts and detected by said one, a high resistance is generated between the cut-off contact connected to the scanning matrix and the scanning matrix with a magnetic current of more than a certain value. 1. A subscriber circuit characterized by inserting current value holding elements in series.・
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8788982A JPS58205393A (en) | 1982-05-26 | 1982-05-26 | Subscriber circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8788982A JPS58205393A (en) | 1982-05-26 | 1982-05-26 | Subscriber circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58205393A true JPS58205393A (en) | 1983-11-30 |
Family
ID=13927441
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8788982A Pending JPS58205393A (en) | 1982-05-26 | 1982-05-26 | Subscriber circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58205393A (en) |
-
1982
- 1982-05-26 JP JP8788982A patent/JPS58205393A/en active Pending
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