JPS6237583B2 - - Google Patents

Info

Publication number
JPS6237583B2
JPS6237583B2 JP55175360A JP17536080A JPS6237583B2 JP S6237583 B2 JPS6237583 B2 JP S6237583B2 JP 55175360 A JP55175360 A JP 55175360A JP 17536080 A JP17536080 A JP 17536080A JP S6237583 B2 JPS6237583 B2 JP S6237583B2
Authority
JP
Japan
Prior art keywords
circuit
communication
modem
clock
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.)
Expired
Application number
JP55175360A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5799048A (en
Inventor
Koji Kusumoto
Masakazu Tanaka
Takeshi Kitahara
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP55175360A priority Critical patent/JPS5799048A/ja
Publication of JPS5799048A publication Critical patent/JPS5799048A/ja
Publication of JPS6237583B2 publication Critical patent/JPS6237583B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/14—Arrangements for detecting or preventing errors in the information received by using return channel in which the signals are sent back to the transmitter to be checked ; echo systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • H04L5/1438—Negotiation of transmission parameters prior to communication
    • H04L5/1446—Negotiation of transmission parameters prior to communication of transmission speed

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Quality & Reliability (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
  • Communication Control (AREA)
JP55175360A 1980-12-12 1980-12-12 Modulator and demodulator device Granted JPS5799048A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55175360A JPS5799048A (en) 1980-12-12 1980-12-12 Modulator and demodulator device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55175360A JPS5799048A (en) 1980-12-12 1980-12-12 Modulator and demodulator device

Publications (2)

Publication Number Publication Date
JPS5799048A JPS5799048A (en) 1982-06-19
JPS6237583B2 true JPS6237583B2 (ko) 1987-08-13

Family

ID=15994708

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55175360A Granted JPS5799048A (en) 1980-12-12 1980-12-12 Modulator and demodulator device

Country Status (1)

Country Link
JP (1) JPS5799048A (ko)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4771417A (en) * 1986-09-18 1988-09-13 Racal Data Communications, Inc. High speed modem
JP2689681B2 (ja) * 1990-04-11 1997-12-10 日本電気株式会社 回線自動切替方式
CA2086854C (en) * 1992-03-30 1998-03-31 David Joseph Brigida Method and system for automatic modem protocol selection in a cellular communications system
JP2659498B2 (ja) * 1992-05-19 1997-09-30 メガソフト株式会社 通信装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5361216A (en) * 1976-11-12 1978-06-01 Fujitsu Ltd Facsimile electric transmission system
JPS5421108A (en) * 1977-07-18 1979-02-17 Matsushita Electric Ind Co Ltd Judging method of most suited delivery speed of modem
JPS5527777A (en) * 1978-08-19 1980-02-28 Fujitsu Ltd Control system for picture signal transmission
JPS5593372A (en) * 1979-01-10 1980-07-15 Matsushita Graphic Commun Syst Inc Multiple address unit such as facsimile and the like

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5361216A (en) * 1976-11-12 1978-06-01 Fujitsu Ltd Facsimile electric transmission system
JPS5421108A (en) * 1977-07-18 1979-02-17 Matsushita Electric Ind Co Ltd Judging method of most suited delivery speed of modem
JPS5527777A (en) * 1978-08-19 1980-02-28 Fujitsu Ltd Control system for picture signal transmission
JPS5593372A (en) * 1979-01-10 1980-07-15 Matsushita Graphic Commun Syst Inc Multiple address unit such as facsimile and the like

Also Published As

Publication number Publication date
JPS5799048A (en) 1982-06-19

Similar Documents

Publication Publication Date Title
US5862141A (en) Variable bitrate radio modem system to enhance data transmission and reduce error rates
EP0260470A2 (en) High speed modem
JPS58219847A (ja) 再送要求機能付データ通信方式
US5737535A (en) Flow control circuit for networked communications system including arrangement for reducing overhead at the beginning of a communications session by enabling message transmission before receiving flow control information
JP2006505982A (ja) インターフェース・トランシーバの電力を管理するための方法および装置
JP3132425B2 (ja) 衛星イントラネットサービスにおける通信時間短縮方式
JPS6237583B2 (ko)
US5228129A (en) Synchronous communication interface for reducing the effect of data processor latency
US5444704A (en) Dial restoral method and apparatus
JP2772206B2 (ja) 自動再送要求を用いたデータ伝送方式
JP2006262143A (ja) 通信中継装置、情報管理システム、制御方法、およびプログラム
US5257117A (en) Computer-facsimile system having separately a sending device and a receiving device
JP2874798B2 (ja) 高速データ転送の方法とその装置
JPH07107255A (ja) 画像情報転送制御方式
JP3483342B2 (ja) データ伝送システム及び信号選択接続装置
JPS60236565A (ja) メモリ制御方式
JP2501450B2 (ja) ゲ−トウエイ
AU609791B2 (en) Improvements in or relating to data communication systems
KR940007555B1 (ko) 망동기 장치의 td 버스 인터페이스 방법
JPH09298577A (ja) データ伝送装置
JP2576218B2 (ja) フロー制御方式
JPH08111761A (ja) ファクシミリ装置
JPH11331175A (ja) 無線通信システム
JPH11275172A (ja) 通信制御方式
JPS63304751A (ja) デ−タ変復調装置