JPS6068745A - Exchange system of digital data transmission line - Google Patents
Exchange system of digital data transmission lineInfo
- Publication number
- JPS6068745A JPS6068745A JP17632683A JP17632683A JPS6068745A JP S6068745 A JPS6068745 A JP S6068745A JP 17632683 A JP17632683 A JP 17632683A JP 17632683 A JP17632683 A JP 17632683A JP S6068745 A JPS6068745 A JP S6068745A
- Authority
- JP
- Japan
- Prior art keywords
- terminal device
- line
- circuit
- synchronism
- data transmission
- 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
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/50—Circuit switching systems, i.e. systems in which the path is physically permanent during the communication
- H04L12/52—Circuit switching systems, i.e. systems in which the path is physically permanent during the communication using time division techniques
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
Description
【発明の詳細な説明】
(技術針!L!J)
本発明はディジタル伝送路における端末装置間の交換方
式に関する。DETAILED DESCRIPTION OF THE INVENTION (Technical Point!L!J) The present invention relates to an exchange system between terminal devices in a digital transmission path.
(従来技術)
従来のディジタル伝送路における交換装置1は第1図に
示す如く時分割スイッチ4と複数の端末装置に対応した
インタフェース回路5及び9で構成されている。前記イ
ンタフェース回路5は端末装置2o、、、nから送出さ
れた信号の電気的条件を交換装置1側の電気的条件に変
換するレシーバ回路(RFC) 6と、伝送路13上の
同期を確立する線路同期回路(LSNC)7と、交換装
置lの時分割スイッチ(TSW ) 4に同期させて入
出力する同期回路(SNC) 8よシ成シ、又インタフ
ェース回路9は同期回路(SNC) 7 oと、線路同
期回線(LSNC)Iノと、交換装置lの電気的条件を
端末装置3o、、nの電気的条件に変換して信号を送出
するドライバ回路(Dv)12よす構成される。この従
来方式では送信側の任意の端末装置2o nから送出し
/こ信号をインタフェース回路5で受け各々同期をとっ
た後、時分割スイッチ(TSW)4で所定の受信側の端
末装置3o、、、 nに接続すべく回路設足し、更に前
記受信側端末装置3゜11.nと同期をとってデータの
交換を実現していた。前述の方式はインタフェース回路
がレシーバ回路、線路同期回路及び同期回路等からなり
回路構成が複雑で実装スペースが大きく交換装置の機器
構成上大きな比率を占める/!1の欠点があった。(Prior Art) As shown in FIG. 1, a conventional switching device 1 in a digital transmission line is composed of a time division switch 4 and interface circuits 5 and 9 corresponding to a plurality of terminal devices. The interface circuit 5 establishes synchronization on the transmission line 13 with a receiver circuit (RFC) 6 that converts the electrical conditions of the signals sent from the terminal devices 2o, . . . , n into the electrical conditions of the exchange device 1 side. The line synchronization circuit (LSNC) 7 and the synchronization circuit (SNC) 8 that inputs and outputs in synchronization with the time division switch (TSW) 4 of the switching device 1 are formed, and the interface circuit 9 is a synchronization circuit (SNC) 7 o , a line synchronous line (LSNC) I, and a driver circuit (Dv) 12 that converts the electrical conditions of the switching device I into the electrical conditions of the terminal devices 3o, . . . n and sends out signals. In this conventional method, an interface circuit 5 receives a signal sent from an arbitrary terminal device 2on on the transmitting side, synchronizes each one, and then a time division switch (TSW) 4 selects a predetermined terminal device 3o on the receiving side. , n, and furthermore, a circuit is installed to connect to the receiving side terminal device 3゜11. It was possible to exchange data by synchronizing with n. In the above-mentioned method, the interface circuit consists of a receiver circuit, a line synchronization circuit, a synchronization circuit, etc., and the circuit configuration is complicated and the mounting space is large, occupying a large proportion of the equipment configuration of the switching device. There was one drawback.
(発明の目的)
本発明は前記欠点に鑑みなされたものでデータ伝送の同
期確立は送信、受信の各端末装置間で行ない、交換装置
は端末装置間の接続回路を設定するたけで同期には関与
しない方式とし、容易にデータ伝送の同期確立ができ、
回路構成が簡単な交換装置を実現するものである。以下
図面を用いて本発明の詳細な説明する。(Object of the Invention) The present invention has been made in view of the above-mentioned drawbacks, and synchronization of data transmission is established between each transmitting and receiving terminal device. It is a non-intrusive method and can easily establish synchronization of data transmission.
This realizes a switching device with a simple circuit configuration. The present invention will be described in detail below using the drawings.
(発明の構成)
ディノタルデータ伝送路における端末装置間の交換を行
う装置において、同期回路を有する複数の端末装置と、
回線の交換を行う空間スイッチと該空間スイッチを制御
する制御回路を有する交換装置とを接続し、該交換装置
は空間スイッチによって前記端末装置間の接続のみ行い
、端末装置で同期をとることを特徴としたディジタルデ
ータ交換方式である。(Structure of the Invention) A device for exchanging terminal devices on a dinotal data transmission path, including a plurality of terminal devices having a synchronization circuit;
A space switch that exchanges lines and a switching device having a control circuit that controls the space switch are connected, and the switching device connects only the terminal devices using the space switch, and synchronizes the terminal devices. This is a digital data exchange method.
(実施ρりの説明)
第2図は本発明に係わる一実施例であり、2゜は交換装
置、21o−H+ 220−n は同期回路を有する端
末装置、23,24.25は空間スイッチ(sDo〜6
)、26は制御回路(CTL ) 、2y、 2s。(Explanation of implementation) Fig. 2 shows an embodiment of the present invention, in which 2° is a switching device, 21o-H+ 220-n is a terminal device having a synchronous circuit, and 23, 24, 25 are space switches ( sDo~6
), 26 is a control circuit (CTL), 2y, 2s.
29は伝送路の電気的条件を交換装置の電気的条件に変
換するレシーバ回路(RFC)、30,31゜32はド
ライバ回路(DV)、33はシリアルなデータのビット
列の信号を送るデータ線、34はビット列の区切シを知
らせるクロック信号を送るクロック線、35はデータの
先頭位置を知らせるフレーム信号を送るフレーム線であ
る。29 is a receiver circuit (RFC) that converts the electrical conditions of the transmission line into the electrical conditions of the switching device; 30, 31; 32 is a driver circuit (DV); 33 is a data line that sends a serial data bit string signal; Reference numeral 34 represents a clock line that sends a clock signal that indicates the delimiter of a bit string, and 35 represents a frame line that sends a frame signal that indicates the starting position of data.
交換装置20は送信側の端末装置21o9.nのデータ
線33を空間スイッチ(SDo)23に、クロック線3
4を空間スイッチ(SDI)24に、フレーム線35を
空間スイッチ(SDz)25にそれぞれ収容し、該空間
スイッチ23,24.25を制御回路(CTL ) 2
Gによって所定の端末装置間を接続するように制御す
るものである。例えば送信側を端末装置210.受信側
を端末装置22nとした場合のデータの送受について説
明する。端末装置21oから送出したデータ信号はデー
タ線33を通りレシーバ回路27を介して空間スイッチ
23に加え、クロック信号はクロック線34を通りレシ
ーバ回線28を介して空間スイッチ24に加え、フレー
ム信号ハフレーム線35を通すレシーバ29を介して空
間スイッチ25に加える。該空間スイッチ23,24.
25は制御回路(CTL )26の制往Jによシ受信側
の端末装置22n の回線を選択し接続する。制御回路
26の制御にょシ空間スイッチ2 、? 、 24 、
25が端末装置21o と端末装置22nを接続すると
、データ信号、クロック信号、フレーム信号はそのまま
受信側の端末装置22 Hに送られる。このとき送信側
端末装置21o と受信側端末装置22n間の同期確立
は前記送信1(1j端末装置21oから送出したフレー
ム信号とクロック信号によって受信側の端末装置22n
の同期回路(図示せず)で行う。従って空間スイノ−f
−23,24,25は送信側と受信側の端末を結ぶ回路
形成するのみであって同期確立には関与しない。The exchange device 20 is a transmitting side terminal device 21o9. n data line 33 to space switch (SDo) 23, clock line 3
4 is housed in a space switch (SDI) 24, a frame line 35 is housed in a space switch (SDz) 25, and the space switches 23, 24, 25 are housed in a control circuit (CTL) 2.
G controls the connection between predetermined terminal devices. For example, the sending side is the terminal device 210. Transmission and reception of data when the receiving side is the terminal device 22n will be explained. The data signal sent from the terminal device 21o passes through the data line 33 and is applied to the space switch 23 via the receiver circuit 27, and the clock signal passes through the clock line 34 and is applied to the space switch 24 via the receiver line 28. It is applied to the space switch 25 via the receiver 29 passing the line 35. The space switches 23, 24.
25 selects and connects the line of the terminal device 22n on the receiving side according to the control circuit J of the control circuit (CTL) 26. Control space switch 2 of control circuit 26? , 24,
25 connects the terminal device 21o and the terminal device 22n, the data signal, clock signal, and frame signal are sent as they are to the terminal device 22H on the receiving side. At this time, the synchronization between the transmitting terminal device 21o and the receiving terminal device 22n is established by the frame signal and clock signal sent from the transmitting terminal device 21o and the receiving terminal device 22n.
This is done using a synchronous circuit (not shown). Therefore, space sino-f
-23, 24, and 25 only form a circuit connecting the transmitting side and receiving side terminals, and are not involved in establishing synchronization.
本方式の同期系は端末装置21o、データ伝送路、交換
装置、端末装置22nを一連の系として考えるもので、
同期の確立は各端末装置で行うものであって交換装置は
関与しない。The synchronous system of this method considers the terminal device 21o, data transmission path, switching device, and terminal device 22n as a series system.
Establishment of synchronization is performed by each terminal device, and the switching device is not involved.
前述した実施例は、データ伝送路をデータ線。In the embodiments described above, the data transmission path is a data line.
クロック線、フレーム線の3本で構成した場合を示した
が、クロック信号及びフレーム信号をデータのビット列
の中に組み込んだ伝送形式のノーu合でも同様でこのと
きは1個の空間スイッチでよい。Although the case is shown in which the configuration is made up of three lines, a clock line and a frame line, the same applies to a transmission format in which the clock signal and frame signal are incorporated into the data bit string, and in this case, one space switch is sufficient. .
(発明の効果)
以上説明した如く本発明は送信側端末装置から受信側端
末装置までを一連の同期系として端末装置で同期をとる
もので、空間スイッチの構成が小さい8回線程度の小規
模な交換装置に適し、インタフェース回路が簡単なレシ
ーバ回路あるいはドライバ回路で実現でき、交換装置の
機器構成土有利な装置を提供できるものである。(Effects of the Invention) As explained above, the present invention synchronizes the terminal devices as a series of synchronization systems from the transmitting terminal device to the receiving terminal device. It is suitable for a switching device, the interface circuit can be realized by a simple receiver circuit or a driver circuit, and it is possible to provide a device that is advantageous in terms of the equipment configuration of the switching device.
第1図は従来の交換系の構成を示すブロック図、第2図
は本発明に係わる交換系のff’を成を示すブロック図
である。
l、20 交換装置、2o、、。l 21o”’In
122o n・・端末装置、4・・・時分割スイッチ、
5゜9 インタフェース回路、2 、? 、 24 、
25 空間スイッチ、26 制御回路、27.28.2
9・・レンーパ回路、30..31.32・・ドライバ
回路、33・データ線、34 クロック線、35・・・
フレーム線。
特許出願人 沖電気工業株式会社
日本電信電話公社
1、事件の表示
昭和58年 特 許 願第 176326号2 発明の
名称
ディジタルデータ伝送路交換方式
3、補正をする者
事件との関係 特許出願人
6 補正の内容 図面「第1図」を別紙のとおシ補正す
る。FIG. 1 is a block diagram showing the configuration of a conventional switching system, and FIG. 2 is a block diagram showing the configuration of ff' of the switching system according to the present invention. l, 20 exchange device, 2o, . l 21o"'In
122on...terminal device, 4...time division switch,
5゜9 Interface circuit, 2,? , 24,
25 Space switch, 26 Control circuit, 27.28.2
9. Lempa circuit, 30. .. 31.32...driver circuit, 33.data line, 34 clock line, 35...
frame line. Patent Applicant Oki Electric Industry Co., Ltd. Nippon Telegraph and Telephone Public Corporation 1, Indication of Case 1982 Patent Application No. 176326 2 Title of Invention Digital Data Transmission Line Switching System 3, Person Who Makes Amendment Relationship to Case Patent Applicant 6 Contents of the amendment The drawing “Figure 1” will be amended as shown in the attached sheet.
Claims (1)
う装置において、複数の端末装置と、伝送路交換手段と
該伝送路交換手段を制御する制御回路と伝送路の電気的
条件を交換装置の電気的条件に変換する回路を有する交
換装置とを接続し、該交換装置は交換手段によって前記
端末装置間の接続を行い、同期は端末装置間でとること
を特徴としたディジタルデータ伝送路交換方式。In a device that performs exchange between terminal devices on a digital data transmission path, a plurality of terminal devices, a transmission path switching means, a control circuit that controls the transmission path switching means, and the electrical conditions of the transmission path are connected to the electrical conditions of the switching device. 1. A digital data transmission path switching system, characterized in that the switching device connects the terminal devices with a switching device having a circuit for converting the data, the switching device connects the terminal devices using a switching means, and synchronization is established between the terminal devices.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17632683A JPS6068745A (en) | 1983-09-26 | 1983-09-26 | Exchange system of digital data transmission line |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17632683A JPS6068745A (en) | 1983-09-26 | 1983-09-26 | Exchange system of digital data transmission line |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6068745A true JPS6068745A (en) | 1985-04-19 |
Family
ID=16011626
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17632683A Pending JPS6068745A (en) | 1983-09-26 | 1983-09-26 | Exchange system of digital data transmission line |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6068745A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01174047A (en) * | 1987-12-28 | 1989-07-10 | Oki Electric Ind Co Ltd | Data transmission system |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55109062A (en) * | 1979-02-16 | 1980-08-21 | Fujitsu Ltd | Circuit switching device |
JPS55161447A (en) * | 1979-05-31 | 1980-12-16 | Fujitsu Ltd | Data transmission system |
-
1983
- 1983-09-26 JP JP17632683A patent/JPS6068745A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55109062A (en) * | 1979-02-16 | 1980-08-21 | Fujitsu Ltd | Circuit switching device |
JPS55161447A (en) * | 1979-05-31 | 1980-12-16 | Fujitsu Ltd | Data transmission system |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01174047A (en) * | 1987-12-28 | 1989-07-10 | Oki Electric Ind Co Ltd | Data transmission system |
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