JPS6068745A - Exchange system of digital data transmission line - Google Patents

Exchange system of digital data transmission line

Info

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
Application number
JP17632683A
Other languages
Japanese (ja)
Inventor
Toru Furuhashi
古橋　徹
Norio Sakai
堺　紀雄
Ryuzo Shimakage
島影　隆造
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.)
Nippon Telegraph and Telephone Corp
Oki Electric Industry Co Ltd
Original Assignee
Nippon Telegraph and Telephone Corp
Oki Electric Industry Co Ltd
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 Nippon Telegraph and Telephone Corp, Oki Electric Industry Co Ltd filed Critical Nippon Telegraph and Telephone Corp
Priority to JP17632683A priority Critical patent/JPS6068745A/en
Publication of JPS6068745A publication Critical patent/JPS6068745A/en
Pending legal-status Critical Current

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

PURPOSE:To establish easily the synchronism by allowing a terminal device to take synchronism while regarding a system from a terminal device at the transmission side to a terminal device at the reception side as a series of synchronizing system so as to eliminate an exchange from the establishment of cynchronism. CONSTITUTION:A data signal transmitted from a terminal device 210 is applied to a spatial switch 23 through a clock line 34 via a receiver circuit 27, a clock signal is applied to a spatial switch 24 through a clock line 34 via a frame line 35 and a frame signal is applied to a spatial switch 25 through a frame line 35 via a receiver 29. The spatial switches 23, 24, 25 selects a line for a terminal device 22n at the reception side under the control of a control circuit 26 and connects the lines. The synchronism between the terminal device 210 at the transmission side and the terminal device 22n at the reception side is established at a synchronism circuit of the device 22n in this case by using the frame signal and the clock signal transmitted from the device 210. Thus, the switches 23, 24, 25 do not relate to the synchronism establishment.

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.

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

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)

【特許請求の範囲】[Claims] ディジ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、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.
JP17632683A 1983-09-26 1983-09-26 Exchange system of digital data transmission line Pending JPS6068745A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (2)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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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