JPH0457435A - Terminal adaptor - Google Patents

Terminal adaptor

Info

Publication number
JPH0457435A
JPH0457435A JP2166617A JP16661790A JPH0457435A JP H0457435 A JPH0457435 A JP H0457435A JP 2166617 A JP2166617 A JP 2166617A JP 16661790 A JP16661790 A JP 16661790A JP H0457435 A JPH0457435 A JP H0457435A
Authority
JP
Japan
Prior art keywords
speed
data
isdn line
terminal
line
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
JP2166617A
Other languages
Japanese (ja)
Inventor
Kazuhiko Miyazaki
和彦 宮崎
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.)
Toshiba Corp
Original Assignee
Toshiba 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 Toshiba Corp filed Critical Toshiba Corp
Priority to JP2166617A priority Critical patent/JPH0457435A/en
Publication of JPH0457435A publication Critical patent/JPH0457435A/en
Pending legal-status Critical Current

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  • Communication Control (AREA)

Abstract

PURPOSE:To make the data transmission efficiency and the reliability compatible by revising the speed of a data in compliance with the CCITT V110 system when the state of an ISDN line is discriminated to be excellent and in compliance with the CCITT V120 system when the state of the ISDN line is discriminated to be not excellent. CONSTITUTION:When the state of an ISDN line is discriminated to be excellent, a line state monitor section 31 throws a changeover switch 34 to the position of a terminal (a) to revise the speed of a data inputted from a terminal equipment (64kbps or below) into the speed of 64kbps by a V110 speed conversion section 32 and sends the data on a B-channel of the ISDN line. Moreover, when the state of then ISDN line is discriminated to be not excellent, the section 31 throws the changeover switch 34 to the position of a terminal (b) to revise the speed of a data inputted from the terminal equipment (64kbps or below) into the speed of 64kbps by a V120 speed conversion section 33 and sends the data on a B-channel of the ISDN line. Thus, the data transmission efficiency and the reliability are made compatible.

Description

【発明の詳細な説明】 〔発明の目的〕 (産業上の利用分野) 本発明は端末をISDN網に接続するターミナルアダプ
タに係わり、特に速度変換方式に関する。
DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a terminal adapter for connecting a terminal to an ISDN network, and particularly relates to a speed conversion method.

(従来の技術) 従来この種のターミナルアダプタは端末をISDN網に
接続するために用いられるが、端末から入力される64
Kbps以下の速度のデータをISDN基本インタフェ
ースのBチャネルに載せるときには前記データの速度を
64kbpsの速度に変換しなければならない。このた
め、従来のターミナルアダプタはCCITT、VIIO
で規定されたタイムスロット割り当て方式により前記デ
ータの速度変換を行っていた。しかし、このCCITT
、V110の方式はターミナルアダプタ同志でのデータ
の送達確認がしにくいなめ、ISDN網の回線状態が悪
いときにはデータエラーが発生しやすいという欠点があ
った。
(Prior Art) Conventionally, this type of terminal adapter is used to connect a terminal to an ISDN network, but the
When transmitting data at a rate of Kbps or less to the B channel of the ISDN basic interface, the data rate must be converted to a rate of 64 Kbps. For this reason, conventional terminal adapters such as CCITT and VIIO
The speed of the data was converted using the time slot allocation method defined in . However, this CCITT
The V110 system had the disadvantage that it was difficult to confirm data delivery between terminal adapters, and data errors were likely to occur when the line condition of the ISDN network was poor.

かといって、ターミナルアダプタ同志でのデータの送達
確認がしやすいCCITT、V120の方式を採用すれ
ば、前記データエラーの発生を防止できるが、しかし、
回線状態が良いときにも前記V120の方式を常用する
と、フレームヘッダ等により、伝送効率が下がってしま
うという欠点があった。
However, by adopting the CCITT and V120 methods, which make it easy to confirm data delivery between terminal adapters, the occurrence of data errors can be prevented.
If the V120 method is regularly used even when the line condition is good, there is a drawback that the transmission efficiency decreases due to frame headers and the like.

(発明が解決しようとする課題) 上記の如く、従来のターミナルアダプタでは64Kbp
s以下の速度のデータを64kbpsk速度に変換する
際に、CCITT、Vl 10の方式か、或いはCCI
TT、V120の方式のいずれかを固定的に用いていた
ため、データ伝送の効率と、信頼性の両立を図ることが
困難であるという欠点があった。
(Problem to be solved by the invention) As mentioned above, the conventional terminal adapter uses 64Kbp
When converting data at a speed of 64 kbps or less to a speed of 64 kbpsk, use the CCITT, Vl 10 method or CCI
Since one of the TT and V120 systems was fixedly used, there was a drawback in that it was difficult to achieve both data transmission efficiency and reliability.

そこで本発明は上記の欠点を除去するもので、ISDN
網のBチャネルに対するデータの速度変換に際して、デ
ータ伝送効率と信頼性を両立させることができるターミ
ナルアダプタを提供することを目的としている。
Therefore, the present invention aims to eliminate the above-mentioned drawbacks and
It is an object of the present invention to provide a terminal adapter that can achieve both data transmission efficiency and reliability when converting the speed of data to a B channel of a network.

〔発明の構成〕[Structure of the invention]

(課題を解決するための手段) 本発明は速度が64Kbps以下のデータを64Kbp
sのデータに変換してISDN回線のBチャネルに載せ
るターミナルアダプタにおいて、CCITT、VIIO
の方式にてデータの速度変換を行う第1の速度変換手段
と、CCITT、V120の方式にてデータの速度変換
を行う第2の速度変換手段と、前記ISDN回線の状態
を監視する監視手段と、この監視手段によってI SD
N回線の状態が良好と判定された場合は、前記第1の速
度変換手段を用いてデータの速度変換を行い、ISDN
回線の状態が悪いと判定された場合は、前記第2の速度
変換手段を用いてデータの速度変換を行う切り替え手段
とを具備した構成を有する。
(Means for Solving the Problems) The present invention converts data whose speed is 64 Kbps or less into 64 Kbps.
CCITT and VIIO terminal adapters that convert data into
a first speed conversion means for converting data speed according to the system of CCITT, V120; and a monitoring means for monitoring the state of the ISDN line. , by this monitoring means I SD
If it is determined that the condition of the N line is good, the data speed is converted using the first speed conversion means, and the ISDN
If it is determined that the state of the line is poor, the second speed conversion means is used to convert the data speed.

(作用) 本発明のターミナルアダプタにおいて、第1の速度変換
手段はCCITT、Vl 10の方式にてデータの速度
変換を行う。第2の速度変換手段はCCITT、V12
0の方式にてデータの速度変換を行う。監視手段はIS
DN回線の状態を監視する。切り替え手段は前記監視手
段によってISDN回線の状態が良好と判定された場合
は、前記第1の速度変換手段を用いてデータの速度変換
を行い、ISDN回線の状態が悪いと判定された場合は
、前記第2の速度変換手段を用いてデータの速度変換を
行う。
(Function) In the terminal adapter of the present invention, the first speed conversion means performs data speed conversion using the CCITT, Vl 10 method. The second speed conversion means is CCITT, V12
Data speed conversion is performed using the 0 method. Surveillance method is IS
Monitor the status of the DN line. When the monitoring means determines that the ISDN line is in good condition, the switching means converts the data speed using the first speed converting means, and when it is determined that the ISDN line is in poor condition, the switching means performs speed conversion of the data. Data speed conversion is performed using the second speed conversion means.

(実施例) 以下、本発明の一実施例を図面を参照して説明する。第
1図は本発明のターミナルアダプタの一実施例を示した
ブロック図である。1は図示されないISDN網とター
ミナルアダプタ3を接続するISDN回線インタフェー
ス、2は図示されない端末とターミナルアダプタ3を接
続する端末側インタフェース、3はデータの速度変換を
行うターミナルアダプタである。又、ターミナルアダプ
タ3はISDN網の回線状態を監視する回線状態監視部
(監視手段)31、CCI TT、 VIIOの方式で
データの速度を変換する■110110速部(第1の速
度変換手段)32、CCITT。
(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing one embodiment of the terminal adapter of the present invention. 1 is an ISDN line interface that connects the ISDN network (not shown) and the terminal adapter 3; 2 is a terminal-side interface that connects the terminal adapter 3 to a terminal (not shown); 3 is a terminal adapter that converts data speed. The terminal adapter 3 also includes a line status monitoring unit (monitoring means) 31 that monitors the line status of the ISDN network, and a 110110 speed unit (first rate conversion unit) 32 that converts the data speed using the CCI TT and VIIO methods. , CCITT.

■120の方式でデータの速度を変換するV 120速
度変換部(第2の速度変換手段)33及び速度変換部を
切り替える2連の切り替えスイッチ(切り替え手段)3
4を有している。但し、ターミナルアダプタ3の構成部
品はいづれも公知のものである。
■ V 120 speed converter (second speed converter) 33 that converts the data speed using the 120 method and a double switch (switcher) 3 that switches the speed converter
It has 4. However, all the components of the terminal adapter 3 are known.

次に本実施例の動作について説明する。ターミナルアダ
プタの回線状態監視部31は常にISDN回線を通るデ
ータの状態を監視して、前記ISDN回線の状態が良好
か否かを判定する。これにより、回線状態監視部31は
前記ISDN回線の状態が良好であるときには、切り替
えスイッチ34を端子a側に切り替えて、端末側から入
力されるデータの速度(64Kbps以下〉をV110
110速部32によって64Kbpsの速度に変換して
ISDN回線のBチャネルに載せる。又、回線状態監視
部31は前記ISDN回線の状態が悪いときには、切り
替えスイッチ34を端子す側に切り替えて、端末側から
入力されるデータの速度(64Kbps以下)を■12
0120速部33によって64Kbpsの速度に変換し
てISDN回線のBチャネルに載せる。
Next, the operation of this embodiment will be explained. The line status monitoring unit 31 of the terminal adapter constantly monitors the status of data passing through the ISDN line and determines whether the status of the ISDN line is good. As a result, when the ISDN line is in good condition, the line status monitoring unit 31 switches the changeover switch 34 to the terminal a side, and changes the speed of data input from the terminal side (64 Kbps or less) to V110.
The 110 speed unit 32 converts the data to a 64 Kbps speed and sends it to the B channel of the ISDN line. In addition, when the condition of the ISDN line is poor, the line status monitoring unit 31 switches the changeover switch 34 to the terminal side to reduce the speed of data input from the terminal side (64 Kbps or less).
The data is converted to a speed of 64 Kbps by the 0120 speed unit 33, and is sent to the B channel of the ISDN line.

本実施例によれば、回線状態が良いときには、CCIT
T、VIIOの方式で64Kbps以下のデータを64
Kbpsのデータに速度変換するため、データエラーが
少ない状態で、効率の良いデータ伝送を行うことができ
る。又、回線状態が悪いときには、CCITT、V12
0の方式で64Kbps以下のデータを64Kbpsの
データに速度変換するため、ターミナルアダプタ間のデ
ータの送達確認を行って、データエラーが少ない信頼性
の高いデータ伝送を行うことができる。
According to this embodiment, when the line condition is good, CCIT
64Kbps or less data using T, VIIO method
Since the speed is converted to Kbps data, efficient data transmission can be performed with few data errors. Also, when the line condition is bad, CCITT, V12
Since data of 64 Kbps or less is speed-converted to 64 Kbps data using the method of 0, it is possible to confirm data delivery between terminal adapters and perform highly reliable data transmission with few data errors.

〔発明の効果〕〔Effect of the invention〕

以上記述した如く本発明のターミナルアダプタによれば
、ISDN網のBチャネルに対するデータの速度変換に
際して、データ伝送効率と信頼性を両立させることがで
きる。
As described above, according to the terminal adapter of the present invention, it is possible to achieve both data transmission efficiency and reliability when converting the speed of data for the B channel of the ISDN network.

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

第1図は本発明のターミナルアダプタの一実施例を示し
たブロック図である。 1・・・ISDN回線インタフェース 2・・・端末側インタフェース 3・・・ターミナルアダプタ 31・・・回線状態監視部 32・・・■110速度変換部 33・・・V120速度変換部 34・・・切り替えスイッチ 代理人 弁理士 則 近 憲 佑 同  山下
FIG. 1 is a block diagram showing one embodiment of the terminal adapter of the present invention. 1...ISDN line interface 2...Terminal side interface 3...Terminal adapter 31...Line status monitoring unit 32...110 speed converter 33...V120 speed converter 34...Switching Switch agent Patent attorney Nori Chika Yudo Yamashita

Claims (1)

【特許請求の範囲】[Claims] 速度が64Kbps以下のデータを64Kbpsのデー
タに変換してISDN回線のBチャネルに載せるターミ
ナルアダプタにおいて、CCITT、V110の方式に
てデータの速度変換を行う第1の速度変換手段と、CC
ITT、V120の方式にてデータの速度変換を行う第
2の速度変換手段と、前記ISDN回線の状態を監視す
る監視手段と、この監視手段によってISDN回線の状
態が良好と判定された場合は、前記第1の速度変換手段
を用いてデータの速度変換を行い、ISDN回線の状態
が悪いと判定された場合は、前記第2の速度変換手段を
用いてデータの速度変換を行う切り替え手段とを具備し
たことを特徴とするターミナルアダプタ。
In a terminal adapter that converts data with a speed of 64 Kbps or less to data of 64 Kbps and puts it on the B channel of an ISDN line, a first speed converting means for converting the speed of data according to the CCITT, V110 method;
a second speed conversion means that performs data speed conversion using the ITT, V120 method; a monitoring means that monitors the state of the ISDN line; and if the monitoring means determines that the state of the ISDN line is good; a switching means for converting the speed of the data using the first speed converting means and, if it is determined that the ISDN line is in poor condition, converting the speed of the data using the second speed converting means; A terminal adapter characterized by the following:
JP2166617A 1990-06-27 1990-06-27 Terminal adaptor Pending JPH0457435A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2166617A JPH0457435A (en) 1990-06-27 1990-06-27 Terminal adaptor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2166617A JPH0457435A (en) 1990-06-27 1990-06-27 Terminal adaptor

Publications (1)

Publication Number Publication Date
JPH0457435A true JPH0457435A (en) 1992-02-25

Family

ID=15834628

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2166617A Pending JPH0457435A (en) 1990-06-27 1990-06-27 Terminal adaptor

Country Status (1)

Country Link
JP (1) JPH0457435A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7794380B2 (en) 2000-11-02 2010-09-14 Advanced Poly-Packaging, Inc. Pre-opened resealable bags
US10118506B2 (en) 2016-01-08 2018-11-06 Toyota Boshoku Kabushiki Kaisha Slide rail

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7794380B2 (en) 2000-11-02 2010-09-14 Advanced Poly-Packaging, Inc. Pre-opened resealable bags
US10118506B2 (en) 2016-01-08 2018-11-06 Toyota Boshoku Kabushiki Kaisha Slide rail

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