JPS5799048A - Modulator and demodulator device - Google Patents

Modulator and demodulator device

Info

Publication number
JPS5799048A
JPS5799048A JP55175360A JP17536080A JPS5799048A JP S5799048 A JPS5799048 A JP S5799048A JP 55175360 A JP55175360 A JP 55175360A JP 17536080 A JP17536080 A JP 17536080A JP S5799048 A JPS5799048 A JP S5799048A
Authority
JP
Japan
Prior art keywords
stage
line speed
line
speed
circuit
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
JP55175360A
Other languages
English (en)
Other versions
JPS6237583B2 (ja
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 true JPS5799048A (en) 1982-06-19
JPS6237583B2 JPS6237583B2 (ja) 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 (ja)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6387048A (ja) * 1986-09-18 1988-04-18 ラカル　データー　コミュニケーションズ　インコーポレーテッド 高速モデム
JPH03293844A (ja) * 1990-04-11 1991-12-25 Nec Corp 回線自動切替方式
JPH05327792A (ja) * 1992-05-19 1993-12-10 Mega Sofuto Kk 通信装置
JPH0685872A (ja) * 1992-03-30 1994-03-25 Internatl Business Mach Corp <Ibm> セルラー方式通信システムにおけるモデムプロトコル自動選択のための方法およびシステム

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

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6387048A (ja) * 1986-09-18 1988-04-18 ラカル　データー　コミュニケーションズ　インコーポレーテッド 高速モデム
JPH03293844A (ja) * 1990-04-11 1991-12-25 Nec Corp 回線自動切替方式
JPH0685872A (ja) * 1992-03-30 1994-03-25 Internatl Business Mach Corp <Ibm> セルラー方式通信システムにおけるモデムプロトコル自動選択のための方法およびシステム
JPH05327792A (ja) * 1992-05-19 1993-12-10 Mega Sofuto Kk 通信装置

Also Published As

Publication number Publication date
JPS6237583B2 (ja) 1987-08-13

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