JPH0457591A - User network interface system - Google Patents

User network interface system

Info

Publication number
JPH0457591A
JPH0457591A JP2169111A JP16911190A JPH0457591A JP H0457591 A JPH0457591 A JP H0457591A JP 2169111 A JP2169111 A JP 2169111A JP 16911190 A JP16911190 A JP 16911190A JP H0457591 A JPH0457591 A JP H0457591A
Authority
JP
Japan
Prior art keywords
point
network interface
communication
reception
point system
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.)
Granted
Application number
JP2169111A
Other languages
Japanese (ja)
Other versions
JP2621592B2 (en
Inventor
Masaru Yamaguchi
勝 山口
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.)
NEC Corp
Original Assignee
NEC 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 NEC Corp filed Critical NEC Corp
Priority to JP2169111A priority Critical patent/JP2621592B2/en
Publication of JPH0457591A publication Critical patent/JPH0457591A/en
Application granted granted Critical
Publication of JP2621592B2 publication Critical patent/JP2621592B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

PURPOSE:To facilitate impedance matching by adopting a multi-point system for the communication from a network terminator(NT) to a terminal equipment(TE) and adopting a point-to-point system for the communication from the TE to the NT. CONSTITUTION:An NT is connected to TEs 2-1-2-N from a transmission bus 3A to connection lines 3B, 3C by a multi-point system in the case of communication from the NT to the TE. On the other hand, in the case of communication from the TEs 2-1-2-N to the NT 1 by a point-to-point system through reception lines 4A-4C. Thus, even in the case of time division data reception at the reception from the TE to the NT, a phase difference of data as the multi-point system is not caused. Thus, impedance matching is facilitated.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明はＩ　ＳＤＮの国際標準であるニジリーズ勧告に
おける勧告番号１４３０の基本ユーザ・網インタフェー
スを規定したユーザ・網インタフェース方式に関し、特
に網終端袋Ｗ（以下ＮＴという）と端末装置（以下ＴＥ
という）間の配線形態を改良して距離の延長をはかった
ユーザ・網インタフェース方式に関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a user/network interface method that specifies the basic user/network interface of Recommendation No. 1430 in the Nigiri Recommendation, which is an international standard for ISDN. W (hereinafter referred to as NT) and terminal equipment (hereinafter referred to as TE)
This relates to a user-network interface system that aims to extend the distance by improving the wiring configuration between

〔従来の技術〕[Conventional technology]

従来、この種のユーザ・網インタフェース方式はＣＣＩ
ＴＴ勧告に記述されているように、ＮＴと複数のＴＥと
の間の接続はマルチポイント方式およびポイント・ツウ
・ポイント方式が勧告されている。すなわち、マルチポ
イント方式は第２図（ａ）に示すように、ＮＴから配線
された送信バス１２Ａ、受信バス１２ＢにＴＥ１１−１
，１１２．１１−Ｎのそれぞれか並列に多数点て接続さ
れている。ポイント・ツウ・ポイント方式は第２図（ｂ
）に示すように、ＮＴｌ０がら各ＴＥ１１−１〜１１−
Ｎにそれぞれ送信線１３Ａ〜１５Ａ、受信線１３Ｂ〜１
５Ｂにより１対１に接続されていた。Conventionally, this type of user-network interface method was CCI.
As described in the TT Recommendation, multipoint and point-to-point connections between an NT and multiple TEs are recommended. In other words, in the multipoint system, as shown in FIG.
, 112.11-N are connected in parallel at multiple points. The point-to-point method is shown in Figure 2 (b).
), each TE11-1 to 11- from NTl0
Transmission lines 13A to 15A and reception lines 13B to 1 for N, respectively.
They were connected one-to-one by 5B.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

この従来のユーザ・網インタフェース方式の接続方式で
は、マルチポイント方式の場合、複数台のＴＥが一つの
送信バス、受信バスに接続されるので、インピーダンス
マツチングが難しい欠点があり、さらに複数台のＴＥが
時分割で送信するためにＮＴの受信点では、受信系列中
に位相差のあるデータが受信される欠点がある。またポ
イント・ツウ・ポイント方式の場合にはＮＴと複数ＴＥ
間の配線数が多いという欠点がある。In this conventional user/network interface type connection method, in the case of a multipoint method, multiple TEs are connected to one transmission bus and one reception bus, so impedance matching is difficult. Since the TE transmits in a time-division manner, the NT reception point has the disadvantage that data with a phase difference in the reception sequence is received. In addition, in the case of point-to-point method, NT and multiple TE
The disadvantage is that there are a large number of wires between them.

〔課題を解決するための手段〕[Means to solve the problem]

本発明のユーザ・網インタフェース方式はｌ５ＤＮのユ
ーザ・網インタフェース方式において、網終端装置から
Ｎ（Ｎは２以上の整数）個の端末装置に対しては１対Ｎ
のマルチポイント方式の接続とし、前記各端末装置から
前記網終端装置に対しては１対１のポイント・ツウ・ポ
イント方式の接続している。The user-network interface method of the present invention is a 1:N user-network interface method for N (N is an integer of 2 or more) terminal devices from a network terminal device.
A multipoint connection is used, and each terminal device is connected to the network terminal device in a one-to-one point-to-point connection.

〔実施例〕〔Example〕

次に本発明について図面を参照して説明する。 Next, the present invention will be explained with reference to the drawings.

第１図は本発明の一実施例の構成図である。１はＮＴ（
網終端装置）、２−１〜２−ＮはＴＥ（端末装置）であ
り、ＮＴとＴＥとの間の接続は、ＮＴからＴＥ力方向対
しては送信バス３Ａからマルチポイント方式で送信バス
３Ａおよび接続線３Ｂ、３Ｃにより各ＴＥ２−１〜２−
Ｎに接続している。一方、ＴＥ２−１〜２−ＮからＮＴ
Ｉの方向に対しては受信線４Ａ〜４Ｃによりポイント・
ツウ・ポイント方式で接続している。したがってＴＥか
らＮＴへの受信の際には時分割データ受信を行ってもマ
ルチポイント方式のような各データの位相差が生ずるこ
とがない。FIG. 1 is a block diagram of an embodiment of the present invention. 1 is NT (
2-1 to 2-N are TEs (terminal devices), and the connection between the NT and TE is from the transmission bus 3A to the transmission bus 3A in a multi-point system in the direction from the NT to the TE. and each TE2-1 to 2- by connecting wires 3B and 3C.
Connected to N. On the other hand, from TE2-1 to 2-N
For the direction of I, point and
They are connected using the two-point method. Therefore, when receiving data from TE to NT, even if time-division data is received, there is no phase difference between each data as in the multi-point system.

〔発明の効果〕〔Effect of the invention〕

以上説明したように本発明は、ＮＴからＴＥ力方向対し
てマルチポイント形式とし、ＴＥからＮＴ力方向対して
ポイント・ツウ・ポイント方式としたので、従来例と比
較して、インピーダンスマツチングか容易なことと、さ
らにＴＥからＮＴ力方向データ伝送に際して、１つのデ
ータ系列中に位相差が生じない効果がある。また、従来
例と比較して、送信バスの方の配線数が少なくてすむ効
果がある。As explained above, the present invention uses a multi-point method for the NT to TE force direction and a point-to-point method for the TE to NT force direction, so impedance matching is easier than in the conventional example. Furthermore, there is an effect that no phase difference occurs in one data series when transmitting force direction data from TE to NT. Furthermore, compared to the conventional example, there is an effect that the number of wirings for the transmission bus can be reduced.

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

第１図は本発明の一実施例の構成図、第２図（ａ＞、（
ｂ）は従来のユーザ・網インタフェース方式の構成図で
ある。 １．１０・・・ＮＴ（網終端装置ｉ）、２−１〜２−Ｎ
　　１１−１〜１１−Ｎ・・・ＴＥ（端末装置）３Ａ。 １２Ａ・・・送信バス、３Ｂ、３Ｃ・・・接続線、４Ａ
〜４Ｃ・・・受信線、１２Ｂ・・・受信バス、１３Ａ〜
１５Ａ・・・送信線、１３Ｂ〜１５Ｂ・・・受信線。 りＹ関FIG. 1 is a configuration diagram of an embodiment of the present invention, and FIG. 2 (a>, (
b) is a configuration diagram of a conventional user/network interface system. 1.10...NT (network terminal device i), 2-1 to 2-N
11-1 to 11-N...TE (terminal device) 3A. 12A...Transmission bus, 3B, 3C...Connection line, 4A
~4C...Receiving line, 12B...Receiving bus, 13A~
15A...Transmission line, 13B-15B...Reception line. Ri Y Seki

Claims (1)

【特許請求の範囲】[Claims] ＩＳＤＮのユーザ・網インタフェース方式において、網
終端装置からＮ（Ｎは２以上の整数）個の端末装置に対
しては１対Ｎのマルチポイント方式の接続とし、前記各
端末装置から前記網終端装置に対しては１対１のポイン
ト・ツウ・ポイント方式の接続とすることを特徴とする
ユーザ・網インタフェース方式。In the ISDN user/network interface system, a 1-to-N multipoint connection is used from a network termination device to N (N is an integer of 2 or more) terminal devices, and each terminal device is connected to the network termination device. A user-network interface system characterized by a one-to-one point-to-point connection.
JP2169111A 1990-06-27 1990-06-27 User / network interface method Expired - Lifetime JP2621592B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2169111A JP2621592B2 (en) 1990-06-27 1990-06-27 User / network interface method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2169111A JP2621592B2 (en) 1990-06-27 1990-06-27 User / network interface method

Publications (2)

Publication Number Publication Date
JPH0457591A true JPH0457591A (en) 1992-02-25
JP2621592B2 JP2621592B2 (en) 1997-06-18

Family

ID=15880506

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2169111A Expired - Lifetime JP2621592B2 (en) 1990-06-27 1990-06-27 User / network interface method

Country Status (1)

Country Link
JP (1) JP2621592B2 (en)

Also Published As

Publication number Publication date
JP2621592B2 (en) 1997-06-18

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