JPH03201150A - Data communication equipment - Google Patents

Data communication equipment

Info

Publication number
JPH03201150A
JPH03201150A JP1342703A JP34270389A JPH03201150A JP H03201150 A JPH03201150 A JP H03201150A JP 1342703 A JP1342703 A JP 1342703A JP 34270389 A JP34270389 A JP 34270389A JP H03201150 A JPH03201150 A JP H03201150A
Authority
JP
Japan
Prior art keywords
line
host computer
data communication
equipment
switch
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
Application number
JP1342703A
Other languages
Japanese (ja)
Inventor
Kanzo Noda
完三 野田
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.)
Sharp Corp
Original Assignee
Sharp 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 Sharp Corp filed Critical Sharp Corp
Priority to JP1342703A priority Critical patent/JPH03201150A/en
Publication of JPH03201150A publication Critical patent/JPH03201150A/en
Pending legal-status Critical Current

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  • Computer And Data Communications (AREA)
  • Communication Control (AREA)

Abstract

PURPOSE:To improve the operation efficiency of a line by selectively connecting plural terminal equipments to a line connected to a host computer through a line switch. CONSTITUTION:A terminal equipment 7b provided with a function for controlling the switching of the line switch 6 and a function for selectively turning on/off between contacts b1, b2 connects the common contact (c) of the switch 6 to the switching contact b1 to extract a program or data from the host computer 4. Thus, the equipment 7b is connected to the switching contact (a) and connects also both the contacts b1, b2. Consequently, the equipment 7b is connected to the host computer 4 and connected also to a terminal equipment 7a through the switch 6. Then, the equipment 7a is connected to the host computer 4 and the equipment 7b is also connected to the host computer 4 in the control of the equipment 7a.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は、ホストコンピュータに対して複数の端末装置
を接続したデータ通信装置に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a data communication device in which a plurality of terminal devices are connected to a host computer.

従来の技術 第４図は、ホストコンピュータ１に対して複数の端末装
置１２ａ、２ｂを接続したデータ通信システムの従来の
構成を概略的に示すプロ・ツク図である。従来のデータ
通信装置では、各々の端末装置２ａ、２ｂがホストコン
ピュータ１と１対１に接続されている。すなわち、各端
末装置２ａ、２ｂはそれぞれ専用の回線３ａ、３ｂを介
してホストコンピュータ１に接続されている。BACKGROUND OF THE INVENTION FIG. 4 is a block diagram schematically showing a conventional configuration of a data communication system in which a plurality of terminal devices 12a and 2b are connected to a host computer 1. In a conventional data communication device, each terminal device 2a, 2b is connected to a host computer 1 on a one-to-one basis. That is, each terminal device 2a, 2b is connected to the host computer 1 via a dedicated line 3a, 3b, respectively.

発明が解決しようとする課題 しかし、従来のデータ通信装置のように各端末装置２ａ
、２ｂ別に専用の回線３ａ、３ｂを介してホストコンピ
ュータに接続するのでは、回線３ａ、３ｂごとの使用頻
度に差があることから無駄が多いという問題点があった
。Problems to be Solved by the Invention However, unlike conventional data communication devices, each terminal device 2a
, 2b are connected to the host computer via dedicated lines 3a, 3b, but there is a problem that there is a lot of waste because the frequency of use of each line 3a, 3b is different.

したがって本発明の目的は、回線を効率よく使用するこ
とのできるデータ通信装置を提供することである。Therefore, an object of the present invention is to provide a data communication device that can use lines efficiently.

課題を解決するための手段 本発明は、回線を介してホストコンピュータに接続され
た回線切換え器と、 この回線切換え器に接続され、少なくとも１つは回線切
換え器を切換え制御する機能をもつ複数の端末装・置と
を含み、 回線切換え器を介°して複数の端末装置を回線に切換え
接続するようにしたことを特徴とするデータ通信装置で
ある。Means for Solving the Problems The present invention provides a line switching device connected to a host computer via a line, and a plurality of devices connected to the line switching device, at least one of which has a function of switching and controlling the line switching device. This data communication device is characterized in that it includes a terminal device/device, and is configured to switch and connect a plurality of terminal devices to a line via a line switch.

作　　用 本発明に従えば、回線切換え器を介して複数の端末装置
を選択的にホストコンピュータとの回線に切換え接続で
きるので、１つの回線を複数の端末装置で共用できる。According to the present invention, a plurality of terminal devices can be selectively connected to a line with a host computer via a line switch, so that one line can be shared by a plurality of terminal devices.

実施例 第１１２１は、本発明の一実施例であるデータ通信装置
の概略的な構成を示すブロック図である。ホストコンピ
ュータ４は回線５を介して回線切換え２５６に接続され
ている。また、この回線切換え器６には複数（ここでは
２つ）の端末装置７ａ、７ｂが接続されている。Embodiment No. 1121 is a block diagram showing a schematic configuration of a data communication device that is an embodiment of the present invention. Host computer 4 is connected to line switching 256 via line 5. Further, a plurality of (here, two) terminal devices 7a and 7b are connected to this line switching device 6.

すなわち、回線切換え器６では、コモン接点６Ｃが回線
５を介してホストコンピュータ４に接続され、このコモ
ン接点Ｃに切換え接続される切換え接点ａ、ｂｌと残る
１つの接点ｂ２は端末装置７ａ、７ｂに接続されている
。つまり、切換え接点ａ、ｂ２は回線Ａ、Ｂ２を介して
一方の端末装置７ａに接続され、切換え接点ｂ１は回線
Ｂｌを介して他方の端末装置７ｂに接続されている。That is, in the line switching device 6, the common contact 6C is connected to the host computer 4 via the line 5, and the switching contacts a and bl that are switched and connected to this common contact C and the remaining contact b2 are connected to the terminal devices 7a and 7b. It is connected to the. That is, the switching contacts a and b2 are connected to one terminal device 7a via the lines A and B2, and the switching contact b1 is connected to the other terminal device 7b via the line Bl.

また、上記端末装置７ａ、７ｂのうち１つの端末装置７
ｂには回線切換え器６を切換え制御する機能と、接点ｂ
ｌ、ｂ２間を選択的にオン・オフする機能とが与えられ
ている。Moreover, one terminal device 7 among the terminal devices 7a and 7b is
b has a function to switch and control the line switching device 6, and a contact b
A function is provided to selectively turn on and off between l and b2.

次に、第２図および第３図を参照して上記データ通信装
置の回線切換え動作について説明する。Next, the line switching operation of the data communication apparatus will be explained with reference to FIGS. 2 and 3.

第２図は上記データ通信装置のダウンロード時の動作状
態を示すブロック図であり、第３図はそのデータ通信装
置の通常の動作状態を示すブロック図である。まず、デ
ータ通信装置の立上がり時などにおいて、端末装置７ｂ
はホストコンピュータ４からプログラムやデータを取り
出すダウンロードを行うために、回線切換え器６を第２
図のように切換え制御する。FIG. 2 is a block diagram showing the operating state of the data communication device during downloading, and FIG. 3 is a block diagram showing the normal operating state of the data communication device. First, when starting up the data communication device, etc., the terminal device 7b
In order to download programs and data from the host computer 4, the line switch 6 is connected to the second
Control switching as shown in the figure.

これによって、回線切換え器６のコモン接点Ｃは切換え
接点ｂ１に接続され、端末装置７ｂが回線切換え器６お
よび回線５を介してホストコンピュータ４に接続される
。As a result, the common contact C of the line switching device 6 is connected to the switching contact b1, and the terminal device 7b is connected to the host computer 4 via the line switching device 6 and the line 5.

ダウンロードが終了すると、端末装置７ｂはまた回線切
換え器６を切換え制御して、第３図のようにコモ〉・接
点Ｃを切換え接点ａ側に切換え接続するとともに、切換
え接点ｂ１と接点ｂ２とを接続する。When the download is completed, the terminal device 7b also switches and controls the line switching device 6 to switch and connect the COMO> contact C to the switching contact a side as shown in FIG. Connecting.

これによって、端末装置７ａが回線切換え器６および回
［５を介してホストコンピュータ４に接続されるととも
に、端末装置７ｂが回線切換え器６を介してもう一方の
端末装置　７　ａに接続される。As a result, the terminal device 7a is connected to the host computer 4 via the line switch 6 and the line [5, and the terminal device 7b is connected to the other terminal device 7a via the line switch 6.

以後、ホストコンピュータ４は端末装置７ａに接続され
、またもう一方の端末装置７ｂは端末装置７ａの制御の
もとにホストコンピュータ４に接続される。Thereafter, the host computer 4 is connected to the terminal device 7a, and the other terminal device 7b is connected to the host computer 4 under the control of the terminal device 7a.

発明の効果 以上のように、本発明のデータ通信装置によれば、回線
切換え器を介して複数の端末装置を選択的にホストコン
ピュータとの回線に切換え接続する構成としているので
、１つの回線を複数の端末装置で共用でき、回線の使用
効率を上げることができる。Effects of the Invention As described above, according to the data communication device of the present invention, a plurality of terminal devices are selectively switched and connected to the line with the host computer via the line switch, so that one line can be connected to the host computer. It can be shared by multiple terminal devices, increasing line usage efficiency.

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

第１図は本発明の一実施例であるデータ通信装置の概略
的な構成を示すブロック図、第２図はそのデータ通信装
置のダウンロード時における回線切換え状態を示すブロ
ック図、第３図はそのデータ通信装置の通常時における
回線切換え状態を示すブロック図、第４図は従来のデー
タ通信装置の概略的な構成を示すブロック図である。FIG. 1 is a block diagram showing a schematic configuration of a data communication device that is an embodiment of the present invention, FIG. 2 is a block diagram showing a line switching state during downloading of the data communication device, and FIG. A block diagram showing a normal line switching state of a data communication device. FIG. 4 is a block diagram showing a schematic configuration of a conventional data communication device.

Claims (1)

【特許請求の範囲】 回線を介してホストコンピュータに接続された回線切換
え器と、 この回線切換え器に接続され、少なくとも１つは回線切
換え器を切換え制御する機能をもつ複数の端末装置とを
含み、 回線切換え器を介して複数の端末装置を回線に切換え接
続するようにしたことを特徴とするデータ通信装置。[Scope of Claims] A line switching device connected to a host computer via a line, and a plurality of terminal devices connected to the line switching device, at least one of which has a function of switching and controlling the line switching device. , A data communication device characterized in that a plurality of terminal devices are switched and connected to a line via a line switch.
JP1342703A 1989-12-28 1989-12-28 Data communication equipment Pending JPH03201150A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1342703A JPH03201150A (en) 1989-12-28 1989-12-28 Data communication equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1342703A JPH03201150A (en) 1989-12-28 1989-12-28 Data communication equipment

Publications (1)

Publication Number Publication Date
JPH03201150A true JPH03201150A (en) 1991-09-03

Family

ID=18355843

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1342703A Pending JPH03201150A (en) 1989-12-28 1989-12-28 Data communication equipment

Country Status (1)

Country Link
JP (1) JPH03201150A (en)

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