JPH0129110B2 - - Google Patents
Info
- Publication number
- JPH0129110B2 JPH0129110B2 JP57003872A JP387282A JPH0129110B2 JP H0129110 B2 JPH0129110 B2 JP H0129110B2 JP 57003872 A JP57003872 A JP 57003872A JP 387282 A JP387282 A JP 387282A JP H0129110 B2 JPH0129110 B2 JP H0129110B2
- Authority
- JP
- Japan
- Prior art keywords
- terminal
- network control
- control device
- circuit
- center
- 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
Links
- 230000005540 biological transmission Effects 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000008054 signal transmission Effects 0.000 description 4
- 230000005611 electricity Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
- H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors
Description
【発明の詳細な説明】 本発明は網制御装置の端子拡張方式に関する。[Detailed description of the invention] The present invention relates to a terminal expansion method for a network control device.
近年、加入電話回線（以下電話回線という）を
利用してセンタ装置が遠隔地にある端末装置から
データを収集するシステム、例えば水道・ガス・
電気などの使用量を自動的に読み取る自動検針シ
ステムが実用化されつつある。 In recent years, systems in which a central device collects data from terminal devices in remote locations using subscriber telephone lines (hereinafter referred to as telephone lines), such as water, gas,
Automatic meter reading systems that automatically read the amount of electricity, etc. used are being put into practical use.
この種のテレメータシステムは、電話回線に接
続された網制御装置を介して複数の端末装置とセ
ンタ装置との相互間でデータ伝送を行なうもので
あるが、このテレメータシステムの実用化に際し
ては網制御装置の小型化、低価格化を考慮する必
要がある。 This type of telemeter system transmits data between multiple terminal devices and a center device via a network control device connected to a telephone line. It is necessary to consider reducing the size and cost of the device.
ところで、網制御装置に接続可能な端末装置の
数、すなわち網制御装置の接続端子数は、端末装
置の拡張性の点から考えると多いほど望ましい。
しかしながら、網制御装置に予め多数の接続端子
を設けることは不稼動のコネクタまたは端子板の
スペースの増大を招き、網制御装置の小型化、低
価格化の障害となる。 Incidentally, the number of terminal devices that can be connected to the network control device, that is, the number of connection terminals of the network control device, is preferably as large as possible from the viewpoint of expandability of the terminal devices.
However, providing a network control device with a large number of connection terminals in advance increases the space for non-operating connectors or terminal boards, which becomes an obstacle to miniaturization and cost reduction of the network control device.
一方、端末装置の数に対応した接続端子数の網
制御装置を設置しておき、端末装置の増設時に必
要な接続端子数の網制御装置と取り替える方法も
考えられるが、この方法は工事性、経済性が劣る
という欠点があつた。 On the other hand, it is also possible to install a network control device with the number of connection terminals corresponding to the number of terminal devices, and then replace it with a network control device with the number of connection terminals required when adding terminal devices, but this method is difficult to construct and The disadvantage was that it was less economical.
本発明は上記欠点を解決するためになされたも
ので、網制御装置に必要以上の接続端子を設ける
ことなく、必要に応じて容易に接続端子数を増加
させることができる端子拡張方式を提供すること
を目的とする。 The present invention has been made to solve the above-mentioned drawbacks, and provides a terminal expansion method that allows the number of connection terminals to be easily increased as needed without providing a network control device with more connection terminals than necessary. The purpose is to
この発明によれば、網制御装置の端末装置接続
用端子のうちの特定端子に端末装置拡張用の付加
装置を接続し、該付加装置に接続されている端末
装置を選択接続する場合にはセンタ装置から前記
網制御装置に前記特定端子を選択する第１の選択
符号を送出し、該特定端子が選択されたのち前記
付加装置を動作可能にし、その後前記センタ装置
から前記網制御装置を介して前記付加装置に該付
加装置に接続されている端末装置を選択する第２
の選択符号を送出して前記センタ装置と前記付加
装置に接続されている端末装置とを接続し、接続
可能な端末装置の数を増加させるようにしてい
る。 According to this invention, when an additional device for terminal device expansion is connected to a specific terminal among terminal device connection terminals of a network control device, and a terminal device connected to the additional device is selectively connected, the center Sending a first selection code for selecting the specific terminal from the device to the network control device, enabling the additional device after the specific terminal is selected, and then transmitting the first selection code from the center device via the network control device. a second step of selecting a terminal device connected to the additional device;
A selection code is sent to connect the center device and the terminal devices connected to the additional device, thereby increasing the number of connectable terminal devices.
以下本発明を添付図面を参照して詳細に説明す
る。 The present invention will now be described in detail with reference to the accompanying drawings.
第１図は本発明が適用されるテレメータシステ
ムの概略構成図であり、第２図は第１図の端末側
の詳細を示すブロツク図である。センタ装置１は
中央処理装置とセンタ用網制御装置から構成さ
れ、所望の端末装置を選択接続するための選択信
号を送出する自動ダイヤル機能、端末装置との間
でデータを送受信するデータ送受信機能、該デー
タの変復調を行なう変復調機能等を有する。交換
網３は前記選択信号により出線選択を行ない発信
側と着信側とを電話回線２１，２２を介して接続
する。なお、交換網３は端末装置を選択接続する
場合に電話回線２２に接続されている電話機４の
ベルを鳴らさずに網制御装置５の端末装置の接続
を行なう新しいサービスであるノーリンギング接
続機能、網制御装置５からの応答信号により課金
を行なう新しいサービスのための課金機能等を有
する。 FIG. 1 is a schematic configuration diagram of a telemeter system to which the present invention is applied, and FIG. 2 is a block diagram showing details of the terminal side of FIG. 1. The center device 1 is composed of a central processing unit and a center network control device, and has an automatic dialing function that sends out a selection signal for selectively connecting a desired terminal device, a data transmitting and receiving function that transmits and receives data to and from the terminal device, It has a modulation/demodulation function for modulating and demodulating the data. The switching network 3 selects an outgoing line based on the selection signal and connects the calling side and the called side via telephone lines 21 and 22. The switching network 3 has a no-ringing connection function, which is a new service that connects the terminal device of the network control device 5 without ringing the bell of the telephone 4 connected to the telephone line 22 when selectively connecting the terminal device. It has a billing function for new services in which billing is performed based on response signals from the control device 5.
網制御装置５は第２図に示すように接続回路５
１、変復調回路５２、データ送受信回路５３、端
子選択回路５４、応答信号送出回路５５、電源回
路５６、から構成され、データ伝送を行なう場合
は、電話機４のベルを鳴らさないで電話回線２１
と端末側との接続を行なうノーリンギング接続、
着信信号の検出、端末装置の選択、データ信号の
送出等の機能、さらに網制御装置５の動作電源と
して電話回線２２からの微小電流を利用する局電
源動作機能等を備えている。 The network control device 5 has a connection circuit 5 as shown in FIG.
1. Consists of a modulation/demodulation circuit 52, a data transmission/reception circuit 53, a terminal selection circuit 54, a response signal transmission circuit 55, and a power supply circuit 56. When transmitting data, the telephone line 21 is connected without ringing the bell of the telephone 4.
No-ringing connection to connect with the terminal side,
It has functions such as detecting an incoming signal, selecting a terminal device, and transmitting a data signal, as well as a station power operation function that utilizes a minute current from the telephone line 22 as an operating power source for the network control device 5.
付加装置７は網制御装置５の特定端子に接続さ
れ、端末装置の接続端子数を増加させるもので、
データ送受信回路７１、端子選択回路７２、応答
信号送出制御回路７３、電源回路７４から構成さ
れている。 The additional device 7 is connected to a specific terminal of the network control device 5 and increases the number of connection terminals of the terminal device.
It is composed of a data transmission/reception circuit 71, a terminal selection circuit 72, a response signal transmission control circuit 73, and a power supply circuit 74.
ここで、付加装置に接続されている端末装置８
２を選択接続し、端末装置８２とセンタ装置１と
の相互間でデータ伝送を行なう場合について、第
３図に示すタイムチヤートを参照して説明する。
この場合、まずセンタ装置１から発呼要求がある
と、電話回線２１，２２交換網３を介して網制御
装置５に対するノーリンギング接続が行なわれ
る。ノーリンギング接続は、接続回路５１におい
て、電話回線２２の極性反転状態検出後、センタ
装置１から送出される特定の呼出信号を検出した
後、センタに端子選択可信号を送出して完了す
る。接続回路５１によりノーリンギング接続が完
了してから所定時間T1後、センタ装置１は第１
の選択符号を交流信号に変調して所定時間T2送
出する。この第１の選択符号は、接続回路５１を
介して、変復調回路５２に導かれて復調され、ベ
ースバンドのデータ信号Ａ（第３図ａ参照）とし
てデータ送受信回路５３に入り復号される。 Here, the terminal device 8 connected to the additional device
The case where data transmission is performed between the terminal device 82 and the center device 1 by selectively connecting the terminal device 82 and the center device 1 will be described with reference to the time chart shown in FIG.
In this case, first, when a call request is received from the center device 1, a no-ringing connection is made to the network control device 5 via the telephone lines 21, 22 and the switching network 3. The no-ringing connection is completed by the connection circuit 51 detecting a polarity inversion state of the telephone line 22, detecting a specific ringing signal sent from the center device 1, and then sending a terminal selectable signal to the center. After a predetermined time T1 after the no-ringing connection is completed by the connection circuit 51, the center device 1
The selected code is modulated into an AC signal and transmitted for a predetermined time T2 . This first selection code is guided to a modulation/demodulation circuit 52 via a connection circuit 51, demodulated, and input to a data transmission/reception circuit 53 as a baseband data signal A (see FIG. 3a), where it is decoded.
端子選択回路５４は第１の選択符号に対応する
接続端子、ここでは付加装置７が接続されている
特定端子を選択する。センタ装置１は第１の選択
符号送出完了後、所定時間T3経過したのち、第
２の選択符号を所定時間T4送出する。この第２
の選択符号は変復調回路５２で復調されたのち、
データ送受信回路５３を通過し、さらに端子選択
回路５４、データ信号線６１を介してデータ信号
Ｂとしてデータ送受信回路７１に導かれ、ここで
受信復号される（第３図ｂ参照）。端子選択回路
７２は復号された第２の選択符号に対応する接続
端子を選択し、端末装置８２とセンタ装置１とを
接続する。これにより接続完了後所定時間T5経
過のち、端末装置８２とセンタ装置１との相互間
でデータＣのデータ伝送が行なわれる（第３図ｃ
参照）。 The terminal selection circuit 54 selects the connection terminal corresponding to the first selection code, here the specific terminal to which the additional device 7 is connected. The center device 1 transmits the second selection code for a predetermined time T 4 after a predetermined time T 3 has elapsed after completion of sending the first selection code. This second
After the selected code is demodulated by the modulation/demodulation circuit 52,
The signal passes through the data transmitting/receiving circuit 53, and is further guided as a data signal B via the terminal selection circuit 54 and the data signal line 61 to the data transmitting/receiving circuit 71, where it is received and decoded (see FIG. 3b). The terminal selection circuit 72 selects the connection terminal corresponding to the decoded second selection code, and connects the terminal device 82 and the center device 1. As a result, data C is transmitted between the terminal device 82 and the center device 1 after a predetermined time T5 has elapsed after the connection is completed (Fig. 3c).
reference).
一方、網制御装置５の電源回路５６は、電話回
線２２の極性が反転状態の場合に電話回線２２を
流れる微小電流を利用して網制御装置５の各回路
を動作させる動作電流を供給するとともに、端子
選択回路５４から付加装置７が接続されている特
定端子が選択されたことを示す信号が加えられた
のち、またはノーリンギング接続完了後特定端子
の選択完了前から、電源供給線６４を介して付加
装置７の電源回路７４に動作電流Ｄを供給する
（第３図ｄ参照）。付加装置７は動作電流Ｄが供給
された時点で動作可能になる。 On the other hand, the power supply circuit 56 of the network control device 5 supplies an operating current for operating each circuit of the network control device 5 by using a minute current flowing through the telephone line 22 when the polarity of the telephone line 22 is inverted. , after a signal indicating that the specific terminal to which the additional device 7 is connected has been selected is applied from the terminal selection circuit 54, or after the no-ringing connection is completed and before the selection of the specific terminal is completed, the signal is sent via the power supply line 64. An operating current D is supplied to the power supply circuit 74 of the additional device 7 (see FIG. 3d). The additional device 7 becomes operational when the operating current D is supplied.
また、付加装置７の端子選択回路７２は、第２
の選択符号に対応する端子を選択した時点で端子
選択完了信号を応答信号送出制御回路７３に出力
し、応答信号送出制御回路７３は制御信号線６３
を介して網制御装置５の応答信号送出回路５５に
制御信号Ｅを送出する（第３図ｅ参照）。応答信
号送出回路５５はこの制御信号Ｅにより応答信号
Ｆを接続回路５１を介して電話回線２１に送出す
る（第３図ｆ参照）。これにより端末装置８２と
センタ装置１は通信可能状態に入る。 Further, the terminal selection circuit 72 of the additional device 7
When the terminal corresponding to the selection code is selected, a terminal selection completion signal is output to the response signal transmission control circuit 73, and the response signal transmission control circuit 73 connects the control signal line 63 to the terminal selection completion signal.
A control signal E is sent to the response signal sending circuit 55 of the network control device 5 via the network controller 5 (see FIG. 3e). In response to this control signal E, the response signal sending circuit 55 sends out a response signal F to the telephone line 21 via the connection circuit 51 (see FIG. 3f). As a result, the terminal device 82 and the center device 1 enter a communicable state.
以上の動作は網制御装置５の特定端子に接続さ
れた付加装置７を介して端末装置８２とセンタ装
置１との間でデータ伝送を行なう場合であるが、
網制御装置５に直接接続されている端末装置８１
とセンタ装置１との間でデータ伝送を行なう場合
は、センタ装置１から送出される第２の選択符号
は不要になり、応答信号送出回路５５は端子選択
回路５４から送出される端子選択完了信号を入力
して応答信号Ｆを出力する。それ以外は上述した
場合と同様にして端末装置８１の選択接続および
データ伝送が行なわれる。 The above operation is for the case where data is transmitted between the terminal device 82 and the center device 1 via the additional device 7 connected to a specific terminal of the network control device 5.
Terminal device 81 directly connected to network control device 5
When performing data transmission between the center device 1 and the center device 1, the second selection code sent from the center device 1 becomes unnecessary, and the response signal sending circuit 55 uses the terminal selection completion signal sent from the terminal selection circuit 54. is input and a response signal F is output. Other than that, selective connection of the terminal device 81 and data transmission are performed in the same manner as described above.
なお、端末装置と端子選択回路との間はデータ
信号線と共通帰線の２心ケーブルで接続され、網
制御装置５と付加装置７との間はデータ信号線６
１、共通帰線６２、制御信号線６３、電源供給線
６４の４心ケーブルで接続される。 Note that the terminal device and the terminal selection circuit are connected by a two-core cable with a data signal line and a common return line, and the data signal line 6 is connected between the network control device 5 and the additional device 7.
1. Connected by a four-core cable consisting of a common return line 62, a control signal line 63, and a power supply line 64.
また、本実施例は網制御装置の特定端子に１つ
の付加装置を接続した場合について説明したが、
これに限らず複数の付加装置を接続してもよく、
また付加装置の特定端子にさらに付加装置を接続
するようにしてもよい。 Furthermore, although this embodiment has been described with respect to the case where one additional device is connected to a specific terminal of the network control device,
Not limited to this, multiple additional devices may be connected.
Furthermore, an additional device may be connected to a specific terminal of the additional device.
以上説明したように本発明によれば、端末装置
の増設時に網制御装置の特定端子に付加装置を接
続することにより容易に端子を増加させることが
できる。したがつて、網制御装置に予め多数の接
続端子を設ける必要がなく、網制御装置の小型
化、低価格化を図ることができる。また、上記増
設時における工事性、経済性は従来の場合に比べ
て非常に優れている。 As described above, according to the present invention, when adding terminal devices, the number of terminals can be easily increased by connecting an additional device to a specific terminal of the network control device. Therefore, there is no need to provide a large number of connection terminals in the network control device in advance, and the network control device can be made smaller and less expensive. Furthermore, the workability and economical efficiency of the above-mentioned expansion are much better than in the conventional case.
第１図は本発明が適用されるテレメータシステ
ムの概略構成図、第２図は第１図の端末側の一実
施例を示したブロツク図、第３図は第２図の動作
を説明するために用いたタイムチヤートである。
１…センタ装置、２１，２２…電話回線、３…
交換機、４…電話機、５…網制御装置、５１…接
続回路、５２…変復調回路、５３，７１…データ
送受信回路、５４，７２…端子選択回路、５５…
応答信号送出回路、５６，７４…電源回路、７…
付加装置、７３…応答信号送出制御回路、８１，
８２…端末装置。
Fig. 1 is a schematic configuration diagram of a telemeter system to which the present invention is applied, Fig. 2 is a block diagram showing an embodiment of the terminal side of Fig. 1, and Fig. 3 is for explaining the operation of Fig. 2. This is the time chart used. 1... Center device, 21, 22... Telephone line, 3...
Exchange, 4...Telephone, 5...Network control device, 51...Connection circuit, 52...Modulation/demodulation circuit, 53, 71...Data transmission/reception circuit, 54, 72...Terminal selection circuit, 55...
Response signal sending circuit, 56, 74...power supply circuit, 7...
Additional device, 73...Response signal sending control circuit, 81,
82...Terminal device.
Claims (1)
てセンタ装置と前記網制御装置に接続される複数
の端末装置との間でデータ伝送を行なうテレメー
タシステムにおいて、 前記網制御装置と前記端末装置との間に、前記
網制御装置の特定の端子に接続された端末装置拡
張用の付加装置を介在させ、 前記網制御装置は前記センタ装置から送出され
る第１の選択符号により前記網制御装置の特定の
端子を選択する手段を具え、 前記付加装置は、 前記網制御装置を介して前記センタから送出さ
れる第２の選択符号により前記付加装置の所望の
端子を選択する手段と、 前記第２の選択符号により前記付加装置の所望
の端子を選択したタイミングで前記網制御装置か
ら前記センタ装置に応答信号が送出されるように
該応答信号の送出タイミングを制御する応答信号
送出制御手段と を備えた端子拡張方式。 ２ 網制御装置は、加入電話回線を流れる電流を
利用して動作電源とするとともに、該動作電源の
一部を付加装置に供給する特許請求の範囲第１項
記載の端子拡張方式。[Scope of Claims] 1. A telemeter system that performs data transmission between a center device and a plurality of terminal devices connected to the network control device via a network control device connected to a subscriber telephone line, comprising: An additional device for expanding the terminal device connected to a specific terminal of the network control device is interposed between the device and the terminal device, and the network control device receives the first selection code sent from the center device. the additional device selects a desired terminal of the additional device based on a second selection code sent from the center via the network control device; and a response signal for controlling the sending timing of the response signal so that the response signal is sent from the network control device to the center device at the timing when a desired terminal of the additional device is selected by the second selection code. A terminal expansion method equipped with a transmission control means. 2. The terminal expansion method according to claim 1, wherein the network control device uses the current flowing through the subscriber telephone line as an operating power source, and supplies a part of the operating power source to the additional device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP387282A JPS58120364A (en) | 1982-01-13 | 1982-01-13 | Terminal extension system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP387282A JPS58120364A (en) | 1982-01-13 | 1982-01-13 | Terminal extension system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58120364A JPS58120364A (en) | 1983-07-18 |
| JPH0129110B2 true JPH0129110B2 (en) | 1989-06-07 |
Family
ID=11569272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP387282A Granted JPS58120364A (en) | 1982-01-13 | 1982-01-13 | Terminal extension system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58120364A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60136468A (en) * | 1983-12-23 | 1985-07-19 | Nec Corp | Modem built-in type network controller |
| JPS62234453A (en) * | 1986-04-04 | 1987-10-14 | Nippon Telegr & Teleph Corp <Ntt> | Terminal extending system for plural-terminal storing line interface device |
| JPH01272363A (en) * | 1988-04-25 | 1989-10-31 | Rinnai Corp | Remote control device |
| JPH0279656U (en) * | 1988-12-09 | 1990-06-19 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5172245A (en) * | 1974-11-14 | 1976-06-22 | Western Electric Co | |
| JPS56157170A (en) * | 1980-05-08 | 1981-12-04 | Nec Corp | Terminal answer signal system of data transmission system |
-
1982
- 1982-01-13 JP JP387282A patent/JPS58120364A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5172245A (en) * | 1974-11-14 | 1976-06-22 | Western Electric Co | |
| JPS56157170A (en) * | 1980-05-08 | 1981-12-04 | Nec Corp | Terminal answer signal system of data transmission system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58120364A (en) | 1983-07-18 |
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