JPS50110203A - - Google Patents

Info

Publication number
JPS50110203A
JPS50110203A JP49069620A JP6962074A JPS50110203A JP S50110203 A JPS50110203 A JP S50110203A JP 49069620 A JP49069620 A JP 49069620A JP 6962074 A JP6962074 A JP 6962074A JP S50110203 A JPS50110203 A JP S50110203A
Authority
JP
Japan
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
JP49069620A
Other versions
JPS5751304B2 (ja
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 filed Critical
Publication of JPS50110203A publication Critical patent/JPS50110203A/ja
Publication of JPS5751304B2 publication Critical patent/JPS5751304B2/ja
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Telephonic Communication Services (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
  • Bidirectional Digital Transmission (AREA)
  • Communication Control (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
JP49069620A 1974-01-31 1974-06-18 Expired JPS5751304B2 (ja)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US438386*A US3927265A (en) 1974-01-31 1974-01-31 Data modem having line verification and automatic disconnect features

Publications (2)

Publication Number Publication Date
JPS50110203A true JPS50110203A (ja) 1975-08-30
JPS5751304B2 JPS5751304B2 (ja) 1982-11-01

Family

ID=23740454

Family Applications (1)

Application Number Title Priority Date Filing Date
JP49069620A Expired JPS5751304B2 (ja) 1974-01-31 1974-06-18

Country Status (8)

Country Link
US (1) US3927265A (ja)
JP (1) JPS5751304B2 (ja)
CA (1) CA1019486A (ja)
CH (1) CH597730A5 (ja)
DE (1) DE2425987C2 (ja)
FR (1) FR2270734B1 (ja)
GB (1) GB1478655A (ja)
SE (1) SE402196B (ja)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55121773A (en) * 1979-03-13 1980-09-19 Nec Corp Automatic circuit breaking device
JPS5625867A (en) * 1979-08-10 1981-03-12 Hitachi Ltd Information terminal unit with automatic line disconnecting function
JPS60254960A (ja) * 1984-05-31 1985-12-16 Fujitsu Ltd アボ−ト検出方法

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4471489A (en) * 1981-03-19 1984-09-11 General Datacomm Industries, Inc. Automatic answer/originate mode selection in modem
CA1270345A (en) * 1983-01-10 1990-06-12 Claude Robert Dupuis Apparatus for transmitting information via telephone lines
US4654881A (en) * 1984-01-04 1987-03-31 Motorola, Inc. Remote control system having symmetrical tone, send/receive signaling circuits for radio communications
US4920567A (en) * 1986-07-03 1990-04-24 Motorola, Inc. Secure telephone terminal
US4864598A (en) * 1988-07-20 1989-09-05 Keptel, Inc. Loop status verification system
US4937851A (en) * 1988-07-20 1990-06-26 Keptel, Inc. Loop status verification system
US5029204A (en) * 1989-10-26 1991-07-02 Dsc Communications Corporation Operational status controller for echo canceling
US5446740A (en) * 1993-12-17 1995-08-29 Empire Blue Cross/Blue Shield Method of and apparatus for processing data at a remote workstation
EP1062761B1 (en) * 1999-01-08 2007-03-21 Matsushita Graphic Communication Systems, Inc. ACTIVATION OF MULTIPLE xDSL MODEMS WITH HALF DUPLEX AND FULL DUPLEX PROCEDURES
US8375226B1 (en) * 2002-11-20 2013-02-12 Raymond Brandl System and method for selectively isolating a computer from a computer network

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4844011A (ja) * 1971-10-08 1973-06-25

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3427401A (en) * 1964-12-22 1969-02-11 Bell Telephone Labor Inc Automatic reporting telephone that transmits message upon receipt of response signal during predetermined intervals
US3647993A (en) * 1970-05-18 1972-03-07 Wescom Tone disabler
US3783194A (en) * 1972-11-20 1974-01-01 Milgo Electronic Corp Data modem having a fast turn-around time over direct distance dialed networks

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4844011A (ja) * 1971-10-08 1973-06-25

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55121773A (en) * 1979-03-13 1980-09-19 Nec Corp Automatic circuit breaking device
JPS5625867A (en) * 1979-08-10 1981-03-12 Hitachi Ltd Information terminal unit with automatic line disconnecting function
JPS60254960A (ja) * 1984-05-31 1985-12-16 Fujitsu Ltd アボ−ト検出方法
JPH0314377B2 (ja) * 1984-05-31 1991-02-26 Fujitsu Ltd

Also Published As

Publication number Publication date
CH597730A5 (ja) 1978-04-14
SE7406806L (ja) 1975-08-01
GB1478655A (en) 1977-07-06
CA1019486A (en) 1977-10-18
SE402196B (sv) 1978-06-19
DE2425987C2 (de) 1984-07-19
DE2425987A1 (de) 1975-08-14
FR2270734A1 (ja) 1975-12-05
FR2270734B1 (ja) 1980-04-04
US3927265A (en) 1975-12-16
JPS5751304B2 (ja) 1982-11-01

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