JPS62260460A - Terminal equipment - Google Patents
Terminal equipmentInfo
- Publication number
- JPS62260460A JPS62260460A JP10290286A JP10290286A JPS62260460A JP S62260460 A JPS62260460 A JP S62260460A JP 10290286 A JP10290286 A JP 10290286A JP 10290286 A JP10290286 A JP 10290286A JP S62260460 A JPS62260460 A JP S62260460A
- Authority
- JP
- Japan
- Prior art keywords
- terminal
- telephone
- voltage
- operational amplifier
- resistors
- 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
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 230000007257 malfunction Effects 0.000 abstract description 2
- 230000008878 coupling Effects 0.000 description 8
- 238000010168 coupling process Methods 0.000 description 8
- 238000005859 coupling reaction Methods 0.000 description 8
- 230000003287 optical effect Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 241001474791 Proboscis Species 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（浬業上の利用分野）
本発明は加入者回ｆＩＭを介して交換機と接続される端
末装置、さらに詳しくいえば、同一の加入者回線に１台
以上の電話機と端末装置が＋＆続される場合における端
末装置の監視回路に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of application in the commercial field) The present invention relates to a terminal device connected to an exchange via a subscriber line fIM, and more specifically, a terminal device connected to an exchange via a subscriber line The present invention relates to a monitoring circuit for a terminal device when the terminal device is connected.
（従来の技術）
電話機の加入者−に共通に接続される端末装置が通信を
行う場合、電話機が使用されていないことが前提である
ので、電話機の使用状態を確認するための手段が設けら
ｉ’しているのが一般的である。(Prior Art) When a terminal device that is commonly connected to a telephone subscriber communicates, it is assumed that the telephone is not in use. i' is common.
第２図はこの種の従来の端末装置の一舛成９１を示す回
路図である。図示されていない電話交保愼に収容されて
いる加入者回ｍに電話装置と電話装置２が接続され、電
話装置２側に分岐した回線に端末装置３が扱続嘔れたレ
リである。FIG. 2 is a circuit diagram showing a configuration 91 of this type of conventional terminal device. A telephone device and a telephone device 2 are connected to a subscriber line m housed in a telephone exchange center (not shown), and a terminal device 3 is connected to a line branched to the telephone device 2 side.
電話装置２への口吻に継電器Ｘの切戻接点ＺＯ＋：ｅｌ
が挿入され、さらに当該同梱の一方に、光結合素子Ｉ（
Ｓｏ、Ｉ（３１の発光部が挿入されている。Cut-back contact ZO+:el of relay X at the proboscis to telephone device 2
is inserted, and the optical coupling device I (
So, I (31 light emitting parts are inserted).
光結合素子Ｈ８Ｏ、Ｈ３１の発光部は互いに逆方向にな
るように並列接続嘔れている。切換接点ｊｅｏ。The light emitting parts of the optical coupling elements H8O and H31 are connected in parallel in opposite directions. Switching contact jeo.
ｘｌの共通端子は回線側にブレーク重点は電話機ＴＥＩ
、２側に、メータ接点は網ｔＤｌｊ御装置釦装置変復調
装＃ｌにそれぞれ接続されている。嘔らに網制御装置お
よび変復調装置１を制御すべく制御装置２が接続されて
いる。The common terminal of xl is on the line side, and the important point is the telephone TEI.
, 2, the meter contacts are respectively connected to the network tDlj control device button device modem #l. A control device 2 is connected to control the network control device and the modem 1.
光結合素子１（ＳＯ、Ｉｓ １の受光部は抵抗Ｒを介し
て電源＋Ｖとアースとの間に接続され、光結合素子Ｈ８
Ｏ，Ｉ（Ｓｌの受光部と抵抗Ｒの接続点は制御装置２に
接続されており、さらに一端が電源＋Ｖに後続された継
電器Ｘの他端も制御装置２に接続されている。The light receiving part of the optical coupling element 1 (SO, Is 1) is connected between the power supply +V and the ground via the resistor R, and the optical coupling element H8
The connection point between the light receiving section of O, I (Sl) and the resistor R is connected to the control device 2, and the other end of the relay X whose one end is connected to the power supply +V is also connected to the control device 2.
端末装置３よシミ話回線へ発信動作する場合、電話後置
２が通話状態か否か光結合素子）１８０ 。When the terminal device 3 makes a call to the telephone line, the optical coupling element (optical coupling element) 180 determines whether the telephone backend 2 is in a telephone call state.
Ｈ５Ｉ の発光素子によって調べる。通話状態であれ
ば発光素子のいずれかに電流が流れているので、受光素
子のいずれかと抵抗Ｒとの接続点はアース電位となり、
制御装ａｔ２はこれを検出することによシ、発信動作を
行わない。したがって、継電器Ｘも作動しない。Investigate using H5I light emitting device. During a call, current flows through one of the light-emitting elements, so the connection point between one of the light-receiving elements and the resistor R is at ground potential.
By detecting this, the control device at2 does not perform a transmission operation. Therefore, relay X also does not operate.
電話後置２が通話状態でない場合は、光結合素子Ｈ８０
、Ｉｓ １の発光部に電流は流れないので、発（Ｍ可能
であるが、端末装置３からは電話後置Ｉの状態まで監視
できない構成である。When the telephone postfix 2 is not in the talking state, the optical coupling element H80
Since no current flows through the light emitting part of , Is 1, it is possible to emit light (M), but the configuration is such that the terminal device 3 cannot monitor the state of the telephone suffix I.
（発明が解決しようとする問題点）
そのため、電話後置Ｉが通話中に端末装置３よジ発傷動
作を行ってしまう場合がちυ、その場合には電話後置Ｉ
との間で混信が生じ、端末装置としても通信しようとす
る相手に接伏できず、電話機計で選択信号を送出中に発
信した場合には接続先が全く不明となる。(Problem to be Solved by the Invention) Therefore, there are cases where the telephone postfix I performs a firing operation against the terminal device 3 during a call, and in that case, the telephone postfix I
Interference occurs between the terminal device and the terminal device, and if a call is made while the telephone is transmitting a selection signal, the destination becomes completely unknown.
また、電話後置２への回線中には光結合素子）ＬＳＯ、
Ｈ８１が直列に挿入されているために電話後置２の状態
を検知することができるものの直流ループ抵抗が高くな
るという問題がある。In addition, during the line to telephone postfix 2, an optical coupling element) LSO,
Since the H81 is inserted in series, the state of the telephone backend 2 can be detected, but there is a problem in that the DC loop resistance becomes high.
本発明の目的は、上述の欠点を解決するもので、同じ加
入者回線に虚続されている電話機の通話状態を検出する
ことができるとともに、加入者回線の直流ループ抵抗も
高くすることのない端末装置全提供することにある。An object of the present invention is to solve the above-mentioned drawbacks, and is capable of detecting the call status of telephones that are connected to the same subscriber line, and without increasing the DC loop resistance of the subscriber line. We provide all terminal equipment.
（問題点を解決するための手段）
前記目的を達成するために本発明による端末装置は、１
以上の電話機と加入者回？ｔＭを共通に使用可能であっ
て、前記電話機のすべてが使用されていないとき、制御
装置によって切換接点を切換え、加入者回栖を網制御装
置／変復調装置に引き込むことにより通イｍが可能な端
末装置において、１ｊｒＩ記加入者回線のＡ 、Ｂｉに
それぞれ第１、第２の抵抗を接続するとともに、第１．
第２の抵抗の他端を当該端末装置のアースへ接続し、第
１、第２の抵抗の中点にそれぞれ第３、第４の抵抗を接
続するとともに、第３、第４の抵抗の他端をそれぞｎ演
算増幅器の２つの入力に接続し、演算増幅器の出力をレ
ベル変供回路を介して前記制御′Ａ置に接続し、前記電
話機の１台以上がオフフッタの場合と、′１！話機のす
べてがオンフックの場合に前記演算増幅器の２入力のレ
ベルが反転するように前記８ｇ１および第２の抵抗の抵
抗値を選定して構成烙れている。(Means for solving the problems) In order to achieve the above object, the terminal device according to the present invention has the following features:
More phone and subscriber times? tM can be used in common, and when all of the telephones are not in use, communication is possible by switching the switching contacts by the control device and drawing the subscriber's call to the network control device/modulator/demodulator. In the terminal device, first and second resistors are connected to A and Bi of the subscriber line 1, respectively, and the first and second resistors are connected to A and Bi of the subscriber line.
The other end of the second resistor is connected to the ground of the terminal device, and the third and fourth resistors are connected to the midpoints of the first and second resistors, respectively. one end of the telephone is connected to two inputs of an operational amplifier, and the output of the operational amplifier is connected to the control position via a level conversion circuit, if one or more of the telephones is off-footer; ! The resistance values of the 8g1 and second resistors are selected so that the levels of the two inputs of the operational amplifier are inverted when all handsets are on-hook.
（実施例） 以下、図面を参照して本発明をさらに詳しく説明する。(Example) Hereinafter, the present invention will be explained in more detail with reference to the drawings.
第１図は本発明による端末装置の実施例を示す回路図で
ある。従来例の場合と同様、同一の加入者口吻に電話機
計と電話後置２が做続
さｈ１電話慎置２への回線に端末装置を接続する例であ
る。FIG. 1 is a circuit diagram showing an embodiment of a terminal device according to the present invention. As in the case of the conventional example, a telephone terminal and a telephone terminal 2 are connected to the same subscriber's mouth, and a terminal device is connected to the line to the h1 telephone terminal 2.
電話後置Ｉよシ分岐てれた加入者線に設けられた端子Ｌ
１＋Ｌ２ と、電話後置２へ接続される端子Ｔ、、’Ｉ
’、との間に端末装ｊｆ３が押入されている。Terminal L installed on the subscriber line branched off from the telephone postfix I
1+L2 and terminal T connected to telephone rear end 2, 'I
A terminal device jf3 is inserted between the ' and.
端末装置３内の加入者回線の一部をなす回線には継電器
Ｘの切換接点ｘ’、ｘ’が挿入されているのみである。Only the switching contacts x', x' of the relay X are inserted into the line forming part of the subscriber line in the terminal device 3.
この切換接点の共通端子側、すなわち加入者回線側のへ
糾には抵りＴ、ＲＡ ６ ＋ ＲＡ ｓが、Ｂ緋には
抵抗ＲＢ・ 、ＲＢ、がそれぞれ接続され、抵抗ＲＡ１
．ＲＢ、の他端は端末装置３のアースに接続されている
。抵抗ＲＡｏとＲＡ、の中点、および抵抗ＲＢ、とＲＢ
ｌの中点ばそれぞれ抵抗ＲＡ２ 、ＲＢＩ を介して
演算増幅器ＡＭＰの（−）入力端子と（＋）入力端子に
接続されている。演算増幅器ＡＭＰの出力は４８号のレ
ベル変換を行うレベル変換回路４を介して制御装置２に
接続されている。制御装置２は継電器Ｘおよび網制御装
置／変復調装置１を制御することができる。To the common terminal side of this switching contact, that is, to the subscriber line side, resistors T and RA 6 + RA s are connected to the red wire, and resistors RB and RB are connected to the red wire of the switching contact, and the resistor RA1
．． The other end of RB is connected to the ground of the terminal device 3. midpoint between resistances RAo and RA, and resistances RB and RB
The middle points of 1 are connected to the (-) and (+) input terminals of the operational amplifier AMP via resistors RA2 and RBI, respectively. The output of the operational amplifier AMP is connected to the control device 2 via a level conversion circuit 4 that performs No. 48 level conversion. The control device 2 can control the relay X and the network control device/modulator 1 .
電話装置Ｉ 、置２双方ともオンフッタ状態では端子Ｌ
１には一４８Ｖ±５Ｖ（±５ｖは交換機と端末装置のア
ース間の地電位差）、端子Ｌ２にはアース電位が現われ
ている。When both telephone equipment I and equipment 2 are in the on-footer state, the terminal L is
1 has a voltage of -48V±5V (±5V is the ground potential difference between the exchange and the ground of the terminal device), and the ground potential appears at the terminal L2.
このとき、端子Ｌ１の電圧と端末装置ｊｔ３のアース間
を抵抗ＲＡ、とＲＡ、で分圧した電圧が端子Ｌ２の電圧
と端末装置３のアース間を抵抗ＲＢ。At this time, the voltage divided between the voltage at the terminal L1 and the ground of the terminal device jt3 by the resistors RA and RA is connected between the voltage at the terminal L2 and the ground of the terminal device 3 by the resistor RB.
とＲＢ、で分圧した電圧より低くなるように抵抗ＲＡ６
＋ ＲＡｌ ｔ ＲＢ６ ＋ ＲＢＩの抵抗値が
選択される。したがって、この状態では演算増幅器ＡＭ
Ｐの出力は→・電源側となる。resistor RA6 so that the voltage is lower than the voltage divided by and RB.
+ RAl t RB6 + RBI resistance value is selected. Therefore, in this state, the operational amplifier AM
The output of P is →・Power supply side.
また、いずれかの電話機がオフフッタ状態であるときは
、相手より応答があるまでは端子Ｌ１の電圧よシ端子Ｌ
２の電圧の方が高いが、電話機双方ともオンフック状態
のときに比較して端子Ｌ１＋Ｌ２間の電位差は小さくな
シ（直流ループができるため電話機の内部直流抵抗と交
換機側の直流抵抗子線路抵抗で電圧が分圧畑れるため）
、２５Ｖ以下となる。そして、相手が応答すると端子Ｌ
１＋Ｌ２の電圧が反転するため端子り、の電圧が端子Ｌ
２ より高くなる。Also, if either telephone is in the off-footer state, the voltage at terminal L1 will be lower than the voltage at terminal L until there is a response from the other party.
Although the voltage of 2 is higher, the potential difference between terminals L1+L2 is smaller than when both phones are on-hook (because a DC loop is formed, the internal DC resistance of the phone and the DC resistor line resistance on the exchange side) (Because the voltage is a partial pressure field)
, 25V or less. Then, when the other party answers, terminal L
Since the voltage of 1+L2 is reversed, the voltage of terminal L is
2 Higher.
この電話機オフフック状態のときの演算増幅器ＡＭＰの
（＋）入力端子より（−）入力端子の電圧が高くなるよ
うに抵抗ＲＡｏ 、ＲＡｌ 、ＲＢｏ 。Resistors RAo, RAl, and RBo are set so that the voltage at the (-) input terminal of the operational amplifier AMP is higher than the (+) input terminal when the telephone is in the off-hook state.
ＲＢ、’に選ぶことによシ演算増幅器ＡＭＰの出力は一
電源側となる。By selecting RB,', the output of the operational amplifier AMP becomes one power supply side.
上記２つの条件を同時に満足するように、しかも交換機
と端末装置のアース間の地電位差±５Ｖ。In order to satisfy the above two conditions at the same time, the ground potential difference between the exchange and the terminal equipment must be ±5V.
および端子り、、Ｌ、間に加わる交流誘導±１５Ｖの条
件も考慮して電話機のオン／オフフックで演算増幅器Ａ
Ｍ Ｐの出力が十電源側／−１ｔの側になるように抵
抗ＲＡＧ ＋ ＲＡＩ ＋ ＲＢ６ ＋ ＲＢｌの
抵抗比を決定する。Operational amplifier A is connected to the on/off hook of the telephone, taking into account the condition of AC induction ±15V applied between terminals RI and L.
The resistance ratio of the resistors RAG + RAI + RB6 + RBl is determined so that the output of M P is on the 10 power supply side/-1t side.
なお、この場合、端子Ｌ１ 、Ｌ、と端末装置のアース
間の絶縁抵抗が充分大きくなるように抵抗ＲＡｏ 、
ＲＡｔ 、ＲＢｏ 、ＲＢｔの抵抗値を決める必要
がある。In this case, resistors RAo and RAo are set so that the insulation resistance between terminals L1 and L and the ground of the terminal device is sufficiently large.
It is necessary to determine the resistance values of RAt, RBo, and RBt.
（発明の効果） 以上説明したように本発明は、端子り、、Ｌ。(Effect of the invention) As explained above, the present invention provides terminals, L.
の電圧の状態を抵抗プリーダ回路と演算増＠器を用いて
検知できるようにすることによシ端末装置で装置内に引
き込んでいる電話機のオン／オフフックを検出できるだ
けでなく、端末装置の回線側にブランチ按続嘔れている
電話機のオン／オフフックも検出できるので、電話機が
オフフック時に端末装置からの発イ８を抑えることがで
き、電話機での通話者に迷竪をかけず、端末装置も誤動
作を回避することができるという効果がある。By making it possible to detect the state of the voltage using a resistor leader circuit and an arithmetic multiplier, it is possible to not only detect the on/off hook of a telephone that is drawn into the device at the terminal device, but also to It is also possible to detect when a telephone is on/off hook while the telephone is off-hook, so it is possible to suppress 8 noises from the terminal device when the telephone is off-hook. This has the effect of avoiding malfunctions.
４、南面の１５車な説明
第１図は本発明による端末装置の実施例を示す回路図、
第２図は従来の端本装置の回路図である。4. Explanation of 15 cars on the south side. Figure 1 is a circuit diagram showing an embodiment of the terminal device according to the present invention.
FIG. 2 is a circuit diagram of a conventional terminal book device.
ｌ・・・網側御装［（ＮＣＵ）、及び変復調装置（ＭＯ
ＤＥＭ）
２・・・制＃装置
３・−・端末装置
４・・・レベル変換回路
Ｌ＋ 、 Ｌ２ 、Ｔ＋ 、Ｔ！・・Φ回線、又は電話
機への接続端子
Ｘ−噂・継電器
Ｒ＋ ＲＡ（１、ＲＡ４ ＋ ＲＡＪ、 ＲＢＯ＋ Ｒ
Ｂ１＋ ＲＢ２・・・・・・・抵抗器
ＡＭＰ・・・演算増幅器l...Network side control equipment [(NCU) and modem unit (MO
DEM) 2...Control device 3--Terminal device 4...Level conversion circuit L+, L2, T+, T!・・Φ Line or connection terminal to telephone
B1+ RB2...Resistor AMP...Operation amplifier
Claims (1)
、前記電話機のすべてが使用されていないとき、制御装
置によつて切換接点を切換え、加入者回線を網制御装置
／変復調装置に引き込むことにより通信が可能な端末装
置において、前記加入者回線のＡ、Ｂ線にそれぞれ第１
、第２の抵抗を接続するとともに、第１、第２の抵抗の
他端を当該端末装置のアースへ接続し、第１、第２の抵
抗の中点にそれぞれ第３、第４の抵抗を接続するととも
に、第３、第４の抵抗の他端をそれぞれ演算増幅器の２
つの入力に接続し、演算増幅器の出力をレベル変換回路
を介して前記制御装置に接続し、前記電話機の１台以上
がオフフックの場合と、電話機のすべてがオンフックの
場合に前記演算増幅器の２入力のレベルが反転するよう
に前記第１および第２の抵抗の抵抗値を選定したことを
特徴とする端末装置。When one or more telephone sets and the subscriber line can be used in common, and all of the telephone sets are not in use, a switching contact is switched by the control device to draw the subscriber line into the network control device/modulator/demodulator. In a terminal device capable of communication by
, connect the second resistor, connect the other ends of the first and second resistors to the ground of the terminal device, and connect the third and fourth resistors to the midpoints of the first and second resistors, respectively. At the same time, the other ends of the third and fourth resistors are connected to the two ends of the operational amplifier.
the output of the operational amplifier is connected to the control device through a level conversion circuit, and the two inputs of the operational amplifier are connected to the control device when one or more of the telephones are off-hook and when all of the telephones are on-hook. A terminal device characterized in that the resistance values of the first and second resistors are selected so that the levels of the resistors are reversed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10290286A JPS62260460A (en) | 1986-05-02 | 1986-05-02 | Terminal equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10290286A JPS62260460A (en) | 1986-05-02 | 1986-05-02 | Terminal equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62260460A true JPS62260460A (en) | 1987-11-12 |
Family
ID=14339790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10290286A Pending JPS62260460A (en) | 1986-05-02 | 1986-05-02 | Terminal equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62260460A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02145852U (en) * | 1989-05-15 | 1990-12-11 | ||
| JPH04213267A (en) * | 1990-12-10 | 1992-08-04 | Canon Inc | Communication equipment |
-
1986
- 1986-05-02 JP JP10290286A patent/JPS62260460A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02145852U (en) * | 1989-05-15 | 1990-12-11 | ||
| JPH04213267A (en) * | 1990-12-10 | 1992-08-04 | Canon Inc | Communication equipment |
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