GB950739A - Improvements in or relating to data transmission systems - Google Patents

Improvements in or relating to data transmission systems

Info

Publication number
GB950739A
GB950739A GB1953960A GB1953960A GB950739A GB 950739 A GB950739 A GB 950739A GB 1953960 A GB1953960 A GB 1953960A GB 1953960 A GB1953960 A GB 1953960A GB 950739 A GB950739 A GB 950739A
Authority
GB
United Kingdom
Prior art keywords
data
central station
outstation
transmitted
key
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
GB1953960A
Inventor
Esmond Philip Goodwin Wright
Hugh Spence Leman
Robert Philip Walters
Victor John Terry
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to BE604527A priority Critical patent/BE604527A/en
Publication of GB950739A publication Critical patent/GB950739A/en
Expired 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
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • 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
    • 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
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • 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
    • H04L5/143—Two-way operation using the same type of signal, i.e. duplex for modulated signals
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Monitoring And Testing Of Exchanges (AREA)

Abstract

950,739. Exchange systems. STANDARD TELEPHONES & CABLES Ltd. May 26, 1961 [June 2, 1960], No. 19539/60. Heading H4K. In a data transmission system in which data may be transmitted in either direction between a central station and one or more outstations, the data transmitted in one direction being subsequently transmitted in the opposite direction and checked at the originating station, data are transmitted from an outstation to the central station in digital form as different combinations of a series of tones, and from the central station to an outstation in verbal form. As described, one or more outstations (Fig. 1) are connected via normal exchange lines 11, 20 to a central data-processing station (Fig. 2 or Fig. 6). Operation of key 12 at a substation connects up the sending mechanism and manipulation of the keyboard 13 then controls the sending of the digital signals to the central station whereat they are temporarily stored. After a convenient number of digits have been sent, operation of the " Group End " key 13b causes the transmission of a signal to the central station, and the closure of contacts 15. The latter connects up amplifier 16 and loud speaker 16, and the former causes the central station to repeat back the data in verbal form by selection from a library of verbal records (in TIM). If the played back data agree with those transmitted from the outstation, the operation of the " Conform " key 13c by the outstation operator causes the data at the central station to be transferred from the temporary store to a permanent store (magnetic tape or drum, teleprinter &c.). The operation then continues transmission. If the played back data does not agree with those transmitted, operation of the " Cancel " key 13d erases the stored data. Alternatively, operation of the " Group End " key 13b causes the central station to repeat the play back for a second check. If the data originate from the central station, the outstation operator keys back the received data in digital form for comparison with the original data in a comparator 39 (Fig. 6), agreement being indicated by an automatic verbal announcement, followed by the next group of data. Incorrectness results in a repeat of the data group for further check.
GB1953960A 1960-06-02 1960-06-02 Improvements in or relating to data transmission systems Expired GB950739A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
BE604527A BE604527A (en) 1960-06-02 1961-06-02 Improvements to data transmission systems.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2222160A GB910453A (en) 1960-06-24 1960-06-24 Improvements in or relating to data transmission systems

Publications (1)

Publication Number Publication Date
GB950739A true GB950739A (en) 1964-02-26

Family

ID=10175885

Family Applications (3)

Application Number Title Priority Date Filing Date
GB217860A Expired GB959555A (en) 1960-01-21 1960-01-21 Improvements in or relating to data transmission systems
GB1953960A Expired GB950739A (en) 1960-06-02 1960-06-02 Improvements in or relating to data transmission systems
GB2222160A Expired GB910453A (en) 1960-01-21 1960-06-24 Improvements in or relating to data transmission systems

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB217860A Expired GB959555A (en) 1960-01-21 1960-01-21 Improvements in or relating to data transmission systems

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB2222160A Expired GB910453A (en) 1960-01-21 1960-06-24 Improvements in or relating to data transmission systems

Country Status (6)

Country Link
BE (1) BE605312R (en)
CH (1) CH389287A (en)
DE (1) DE1154657B (en)
FR (4) FR1277853A (en)
GB (3) GB959555A (en)
NL (2) NL260263A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4121052A (en) * 1976-01-26 1978-10-17 Richard Herbert L Telephone data recording system

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL270251A (en) * 1960-10-14
US3311879A (en) * 1963-04-18 1967-03-28 Ibm Error checking system for variable length data
DE1230847B (en) * 1963-05-30 1966-12-22 Einer Victor Lous Procedure and arrangement for forwarding corrected information
US3805234A (en) * 1972-07-31 1974-04-16 Westinghouse Electric Corp Digital data transmission system
GB2313747A (en) * 1996-05-30 1997-12-03 Motorola Ltd Data transmission verification
DE19701725C1 (en) * 1997-01-20 1998-06-18 Bosch Gmbh Robert Frequency diplexer
DE102005034506B4 (en) 2005-07-20 2007-11-22 Infineon Technologies Ag Method and system for troubleshooting

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4121052A (en) * 1976-01-26 1978-10-17 Richard Herbert L Telephone data recording system

Also Published As

Publication number Publication date
GB910453A (en) 1962-11-14
GB959555A (en) 1964-06-03
FR80017E (en) 1963-03-01
CH389287A (en) 1965-03-15
FR79897E (en) 1963-02-08
NL265526A (en)
DE1154657B (en) 1963-09-19
FR1277853A (en) 1961-12-01
BE605312R (en) 1961-12-27
NL260263A (en)
FR80018E (en) 1963-03-01

Similar Documents

Publication Publication Date Title
GB1256362A (en) Systems for controlling the operation of a computer device
GB1258930A (en)
GB950739A (en) Improvements in or relating to data transmission systems
GB1269089A (en) Improvements in digital information transfer system
GB1402827A (en) Communication system
US1993870A (en) Recording system
GB1265541A (en)
US3943300A (en) Telephone users apparatus
GB1085938A (en) Voice-frequency key dialling telephone system
GB1059535A (en) Intercommunication system with voice-frequency key dialling
GB1251439A (en)
GB1134887A (en) Dictating system
ES432662A1 (en) Telephone data set
GB1302071A (en)
GB1117292A (en) Supervisory apparatus for telecommunication systems
GB1490260A (en) Communication system
US2060545A (en) Stock quotation system
ES450594A1 (en) Direct station selection circuit
JPS5552662A (en) Automatic message-type automatic answering telephone system
GB837552A (en) Apparatus for selecting a sequence of signals from a plurality of recorded data signals
GB926973A (en) A circuit arrangement for a telecommunications installation
GB966690A (en) Improvements in or relating to telecommuncation exchange systems
GB1235481A (en) Information transmission system
ES374652A1 (en) Accounting system for telephonic exchanges
GB911193A (en) Improvements in or relating to control arrangements in automatic telephone systems