NL180799C - TELECOMMUNICATIONS SYSTEM FOR THE EXCHANGE OF DATA THROUGH TWO LINE BETWEEN A LOCAL TELEPHONE POST AND A NUMBER OF REMOTE SUBSCRIBERS. - Google Patents

TELECOMMUNICATIONS SYSTEM FOR THE EXCHANGE OF DATA THROUGH TWO LINE BETWEEN A LOCAL TELEPHONE POST AND A NUMBER OF REMOTE SUBSCRIBERS.

Info

Publication number
NL180799C
NL180799C NL7511655A NL7511655A NL180799C NL 180799 C NL180799 C NL 180799C NL 7511655 A NL7511655 A NL 7511655A NL 7511655 A NL7511655 A NL 7511655A NL 180799 C NL180799 C NL 180799C
Authority
NL
Netherlands
Prior art keywords
exchange
data
line
telecommunications system
local telephone
Prior art date
Application number
NL7511655A
Other languages
Dutch (nl)
Other versions
NL180799B (en
NL7511655A (en
Original Assignee
Northern Telecom 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 Northern Telecom Ltd filed Critical Northern Telecom Ltd
Publication of NL7511655A publication Critical patent/NL7511655A/en
Publication of NL180799B publication Critical patent/NL180799B/en
Application granted granted Critical
Publication of NL180799C publication Critical patent/NL180799C/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/002—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems
    • H04M9/003—Transmission of control signals from or to the key telephone set; signalling equipment at key telephone set, e.g. keyboard or display equipment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
    • H04L25/40—Transmitting circuits; Receiving circuits
    • H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
    • H04L25/4904—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems using self-synchronising codes, e.g. split-phase codes

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Bidirectional Digital Transmission (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Dc Digital Transmission (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
NL7511655A 1974-10-16 1975-10-03 TELECOMMUNICATIONS SYSTEM FOR THE EXCHANGE OF DATA THROUGH TWO LINE BETWEEN A LOCAL TELEPHONE POST AND A NUMBER OF REMOTE SUBSCRIBERS. NL180799C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA211,515A CA996691A (en) 1974-10-16 1974-10-16 Tow wire, full duplex data transmission system

Publications (3)

Publication Number Publication Date
NL7511655A NL7511655A (en) 1976-04-21
NL180799B NL180799B (en) 1986-11-17
NL180799C true NL180799C (en) 1987-04-16

Family

ID=4101371

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7511655A NL180799C (en) 1974-10-16 1975-10-03 TELECOMMUNICATIONS SYSTEM FOR THE EXCHANGE OF DATA THROUGH TWO LINE BETWEEN A LOCAL TELEPHONE POST AND A NUMBER OF REMOTE SUBSCRIBERS.

Country Status (8)

Country Link
JP (1) JPS5172201A (en)
CA (1) CA996691A (en)
DE (1) DE2546422C2 (en)
FR (1) FR2331222A1 (en)
GB (1) GB1522682A (en)
IT (1) IT1043321B (en)
NL (1) NL180799C (en)
SE (1) SE402510B (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5474602A (en) * 1977-11-28 1979-06-14 Hitachi Ltd Photo delivery unit of synchronous type
JPS5814104B2 (en) * 1978-04-28 1983-03-17 株式会社東芝 Information transmission method
US4287596A (en) * 1979-11-26 1981-09-01 Ncr Corporation Data recovery system for use with a high speed serial link between two subsystems in a data processing system
DE3261985D1 (en) * 1981-02-27 1985-03-07 Bbc Brown Boveri & Cie Arrangement for decoding a biphase coded signal, as well as utilisation of the arrangement
JPS58151154A (en) * 1982-03-03 1983-09-08 Hitachi Ltd Transmission system between devices
US4584719A (en) * 1984-08-24 1986-04-22 System Development Corp. Fiber optic workstation datalink interface
CN115314071B (en) * 2022-08-12 2024-08-06 程艳 Full duplex bidirectional analog front-end hybrid transceiver

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1216759A (en) * 1968-05-23 1970-12-23 Standard Telephones Cables Ltd Subscriber subset for p.c.m. telephone system
GB1182363A (en) * 1968-07-26 1970-02-25 Standard Telephones Cables Ltd Subscriber Subset for PCM Telephone System
GB1229149A (en) * 1969-07-28 1971-04-21
US3637939A (en) * 1970-05-07 1972-01-25 Bell Telephone Labor Inc Line status control for electronic key telephone system

Also Published As

Publication number Publication date
CA996691A (en) 1976-09-07
FR2331222A1 (en) 1977-06-03
SE402510B (en) 1978-07-03
IT1043321B (en) 1980-02-20
FR2331222B1 (en) 1981-10-09
GB1522682A (en) 1978-08-23
DE2546422C2 (en) 1986-12-18
JPS5172201A (en) 1976-06-22
NL180799B (en) 1986-11-17
NL7511655A (en) 1976-04-21
SE7511637L (en) 1976-04-20
DE2546422A1 (en) 1976-04-22

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Legal Events

Date Code Title Description
BA A request for search or an international-type search has been filed
BB A search report has been drawn up
BC A request for examination has been filed
A85 Still pending on 85-01-01
V1 Lapsed because of non-payment of the annual fee