JPH0294946A - D channel access circuit - Google Patents

D channel access circuit

Info

Publication number
JPH0294946A
JPH0294946A JP63246641A JP24664188A JPH0294946A JP H0294946 A JPH0294946 A JP H0294946A JP 63246641 A JP63246641 A JP 63246641A JP 24664188 A JP24664188 A JP 24664188A JP H0294946 A JPH0294946 A JP H0294946A
Authority
JP
Japan
Prior art keywords
signal
channel
gate
binary
channel access
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
JP63246641A
Other languages
Japanese (ja)
Other versions
JP2767830B2 (en
Inventor
Tatsuhiro Ono
小野 龍宏
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 JP63246641A priority Critical patent/JP2767830B2/en
Publication of JPH0294946A publication Critical patent/JPH0294946A/en
Application granted granted Critical
Publication of JP2767830B2 publication Critical patent/JP2767830B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

PURPOSE:To output a D channel signal to be inputted without providing a D channel access requesting signal by providing the title circuit with a sending means to send to D channel signal as a D channel sending signal based on a set signal and a reset signal. CONSTITUTION:The D channel access circuit is composed of detecting parts 11 and 12 and gates 13-15. Further, when a D channel signal (a) is outputted from a layer 2 side circuit, the detecting part 11 outputs a binary '0' detected signal as a set signal (b), and the detecting part 12 outputs seven continuous binary '1' detected signals as reset signals (c). The gate 13 and the gate 14 compose a flip flop, and the gate 15 sends the D channel signal (a) as a D channels sending signal (e) of a layer 1 side circuit based on the output signal (d). Thus, the D channel sending signal (e) can be sent without providing the D channel access requesting signal.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、CCITT (国際電信電話諮問委員会)勧
告1.430インタフエースにおけるDチャネルアクセ
ス回路に関する。
DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to D-channel access circuits in the CCITT (International Telegraph and Telephone Consultative Committee) Recommendation 1.430 interface.

〔従来の技術〕[Conventional technology]

CCITT勧告1.430準拠のT E (Termi
nal Equipmen t)側のDチャネルアクセ
ス回路には、レイヤ1側回路に備えられて、レイヤ2側
回路から人力されるDチャネル信号を、Dチャネル送出
信号として出力するものがある。入力されるDチャネル
信号は、データ通信におけるダイヤル信号等を運ぶ信号
チャネルに係る信号である。
T E (Termi) compliant with CCITT Recommendation 1.430
Some D channel access circuits on the layer 1 side circuit output a D channel signal manually inputted from the layer 2 side circuit as a D channel transmission signal. The input D channel signal is a signal related to a signal channel that carries dial signals and the like in data communication.

このようなりチャネルアクセス回路の一例を第2図に示
す。第2図において、レイヤ2側回路からのDチャネル
信号fが、レイヤ1側回路のDチャネルアクセス回路の
ゲート21に入力される。そして、レイヤ2側回路から
Dチャネルアクセス要求信号gがゲート21に入力され
ると、ゲート21がDチャネル信号fをレイヤ1でのD
チャネル送出信号りとして出力する。
An example of such a channel access circuit is shown in FIG. In FIG. 2, the D channel signal f from the layer 2 side circuit is input to the gate 21 of the D channel access circuit of the layer 1 side circuit. Then, when the D channel access request signal g is input from the layer 2 side circuit to the gate 21, the gate 21 transfers the D channel signal f to the D channel access request signal g in the layer 1 side.
Output as channel transmission signal.

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

上述した従来のDチャネルアクセス回路は、Dチャネル
信号の送出要求の場合、レイヤl側回路とレイヤ2側回
路との間で、Dチャネル信号そのものとそれに加えてD
チャネルアクセス要求信号の2つを必要とする欠点を有
している。
In the case of a D channel signal transmission request, the conventional D channel access circuit described above transmits the D channel signal itself and the D channel signal itself between the layer I side circuit and the layer 2 side circuit.
It has the disadvantage of requiring two channel access request signals.

本発明の目的は、このような欠点を除去し、Dチャネル
アクセス要求信号を設けることな(、入力されるDチャ
ネル信号を出力できるDチャネルアクセス回路を提供す
ることにある。
SUMMARY OF THE INVENTION An object of the present invention is to eliminate such drawbacks and provide a D channel access circuit that can output an input D channel signal without providing a D channel access request signal.

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

本発明は、入力されるDチャネル信号を、Dチャネル送
出信号として送出するDチャネルアクセス回路であって
、 前記Dチャネル信号の2進“0”を検出してセット信号
を出力し、前記Dチャネル信号の2進“1”の所定数連
続を検出してリセット信号を出力する検出手段と、 前記検出手段からのセット信号とリセット信号とに基づ
いて、前記Dチャネル信号をDチャネル送出信号として
送出する送出手段とを有することを特徴としている。
The present invention is a D channel access circuit that sends out an input D channel signal as a D channel sending signal, which detects a binary "0" of the D channel signal and outputs a set signal, and detection means for detecting a predetermined number of consecutive binary "1"s in the signal and outputting a reset signal; and based on the set signal and reset signal from the detection means, sending out the D channel signal as a D channel transmission signal. It is characterized by having a sending means for.

〔実施例〕〔Example〕

次に、本発明の実施例について図面を参照して説明する
Next, embodiments of the present invention will be described with reference to the drawings.

第1図は、本発明の一実施例を示す回路図である。この
Dチャネルアクセス回路は、レイヤ1側回路に備えられ
ており、検出部11.12と、ゲート13、14.15
とで構成される。
FIG. 1 is a circuit diagram showing one embodiment of the present invention. This D channel access circuit is provided in the layer 1 side circuit, and includes a detection section 11.12, gates 13 and 14.15.
It consists of

このような構成のDチャネルアクセス回路において、検
出部11と検出部12とは、入力されるDチャネル信号
aの特性を利用して、Dチャネルの2進“0”を検出し
、Dチャネルの2進“1”連続7個を検出する。そして
、2進“0″を検出する検出部11が、2進“0”の検
出信号を、セット信号すとしてゲート13に出力する。
In the D channel access circuit having such a configuration, the detection unit 11 and the detection unit 12 utilize the characteristics of the input D channel signal a to detect the binary “0” of the D channel, and detect the binary “0” of the D channel. Detect seven consecutive binary “1”s. Then, the detection unit 11 that detects the binary "0" outputs the detection signal of the binary "0" to the gate 13 as a set signal.

また、2進“1”連続7個を検出する検出部12が、2
進“1”連続7個の検出信号を、リセット信号Cとして
ゲート14に出力する。
In addition, the detection unit 12 that detects seven consecutive binary “1”
A detection signal of seven consecutive "1" digits is outputted to the gate 14 as a reset signal C.

ゲート13とゲート14とは、フリップフロップを構成
しており、人力されるセット信号すとリセット信号dと
に基づいて、出力信号dをゲート15の他方の入力端子
に出力する。
Gate 13 and gate 14 constitute a flip-flop, and output signal d to the other input terminal of gate 15 based on a set signal and a reset signal d that are input manually.

ゲート15は、一方の入力端子にDチャネル信号aが入
力され、他方の入力端子に入力される出力信号に基づい
て、Dチャネル信号aをレイヤ1側回路のDチャネル送
出信号eとして送出する。
The gate 15 receives the D channel signal a at one input terminal, and transmits the D channel signal a as the D channel transmission signal e to the layer 1 side circuit based on the output signal input to the other input terminal.

次に、本実施例の動作について説明する。Next, the operation of this embodiment will be explained.

レイヤ2側回路からDチャ′ネル信号aが出力されると
、このDチャネル信号aがゲート15の一方の入力端子
と、検出部11.12とに入力される。Dチャネル信号
aが入力されると、検出部11がDチャネル信号aにお
ける、2進“O”の検出をする。
When the D-channel signal a is output from the layer 2 side circuit, this D-channel signal a is input to one input terminal of the gate 15 and the detection section 11.12. When the D channel signal a is input, the detection unit 11 detects a binary "O" in the D channel signal a.

そして、検出部11が2進“0”の検出信号をセット信
号すとして、ゲート13に出力する。一方、Dチャネル
信号aが入力されると、検出部12がDチャネル信号a
における、2進“1”の7個連続を検出する。そして、
検出部12が2進“1”の7個連続検出信号をリセット
信号Cとして、ゲート14に出力する。このセット信号
すとリセット信号Cに基づいて、ゲート13とゲート1
4とで構成されるフリップフロップが出力信号dを、ゲ
ー目5の他方の入力端子に出力する。一方の入力端子に
Dチャネル信号aが入力されているゲート15は、他方
の入力端子に入力される出力信号dが2進“1”のとき
、Dチャネル信号aを、レイヤ1側回路としてのDチャ
ネル送出信号eとして出力する。また、入力される出力
信号dが2進“0”のとき、ゲー目5はDチャネル信号
aの通過を阻止する。
Then, the detection section 11 outputs a binary "0" detection signal to the gate 13 as a set signal. On the other hand, when the D channel signal a is input, the detection unit 12 detects the D channel signal a.
Detect seven consecutive binary "1"s in . and,
The detection unit 12 outputs seven consecutive detection signals of binary "1" as a reset signal C to the gate 14. Based on this set signal and reset signal C, gate 13 and gate 1
4 outputs the output signal d to the other input terminal of the game 5. When the output signal d input to the other input terminal is binary "1", the gate 15 to which the D channel signal a is input to one input terminal inputs the D channel signal a to the layer 1 side circuit. It is output as a D channel transmission signal e. Further, when the input output signal d is a binary "0", the gate 5 blocks the passage of the D channel signal a.

このようにして本実施例は、Dチャネルの2進“0”検
出信号をセット信号とし、Dチャネルの2進“1”連続
7検出信号をリセット信号とするフリップフロップ、す
なわちゲート信号作成回路を有し、この回路からの出力
信号でDチャネル信号のゲートをとるので、レイヤlと
してのDチャネル送出信号を出力できる。
In this way, this embodiment uses a flip-flop, that is, a gate signal generation circuit, which uses the D channel binary "0" detection signal as a set signal and uses the D channel binary "1" detection signal for seven consecutive detection signals as a reset signal. Since the output signal from this circuit gates the D channel signal, it is possible to output the D channel transmission signal as layer I.

〔発明の効果〕〔Effect of the invention〕

以上説明したように本発明は、Dチャネル送出用の信号
として特にDチャネルアクセス要求信号を設けることな
く、Dチャネル送出信号を送出できる。
As described above, according to the present invention, a D channel transmission signal can be transmitted without specifically providing a D channel access request signal as a D channel transmission signal.

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

第1図は、本発明の一実施例を示す回路図、第2図は、
従来のDチャネルアクセス回路の−例を示す回路図であ
る。 11゜ 12・ ・検出部 13゜ 14゜ 15・ ・ゲート
FIG. 1 is a circuit diagram showing an embodiment of the present invention, and FIG. 2 is a circuit diagram showing an embodiment of the present invention.
1 is a circuit diagram illustrating an example of a conventional D channel access circuit; FIG. 11゜12・・Detection part 13゜14゜15・・Gate

Claims (1)

【特許請求の範囲】[Claims] (1)入力されるDチャネル信号を、Dチャネル送出信
号として送出するDチャネルアクセス回路であって、 前記Dチャネル信号の2進“0”を検出してセット信号
を出力し、前記Dチャネル信号の2進“1”の所定数連
続を検出してリセット信号を出力する検出手段と、 前記検出手段からのセット信号とリセット信号とに基づ
いて、前記Dチャネル信号をDチャネル送出信号として
送出する送出手段とを有することを特徴とするDチャネ
ルアクセス回路。
(1) A D channel access circuit that sends out an input D channel signal as a D channel sending signal, which detects binary "0" of the D channel signal and outputs a set signal, and outputs a set signal to signal the D channel signal. detection means for detecting a predetermined number of consecutive binary "1"s and outputting a reset signal; and based on the set signal and reset signal from the detection means, transmitting the D channel signal as a D channel transmission signal. A D channel access circuit comprising: sending means.
JP63246641A 1988-09-30 1988-09-30 D channel access circuit Expired - Lifetime JP2767830B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63246641A JP2767830B2 (en) 1988-09-30 1988-09-30 D channel access circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63246641A JP2767830B2 (en) 1988-09-30 1988-09-30 D channel access circuit

Publications (2)

Publication Number Publication Date
JPH0294946A true JPH0294946A (en) 1990-04-05
JP2767830B2 JP2767830B2 (en) 1998-06-18

Family

ID=17151433

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63246641A Expired - Lifetime JP2767830B2 (en) 1988-09-30 1988-09-30 D channel access circuit

Country Status (1)

Country Link
JP (1) JP2767830B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001349364A (en) * 2000-11-15 2001-12-21 Tok Bearing Co Ltd Damper and its manufacturing method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6074839A (en) * 1983-09-30 1985-04-27 Toshiba Corp Repeater device
JPS63227247A (en) * 1987-03-17 1988-09-21 Fujitsu Ltd Inspecting device for d-channel echo function of isdn network

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6074839A (en) * 1983-09-30 1985-04-27 Toshiba Corp Repeater device
JPS63227247A (en) * 1987-03-17 1988-09-21 Fujitsu Ltd Inspecting device for d-channel echo function of isdn network

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001349364A (en) * 2000-11-15 2001-12-21 Tok Bearing Co Ltd Damper and its manufacturing method

Also Published As

Publication number Publication date
JP2767830B2 (en) 1998-06-18

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