GB1509014A - Data transmission systems - Google Patents

Data transmission systems

Info

Publication number
GB1509014A
GB1509014A GB21384/75A GB2138475A GB1509014A GB 1509014 A GB1509014 A GB 1509014A GB 21384/75 A GB21384/75 A GB 21384/75A GB 2138475 A GB2138475 A GB 2138475A GB 1509014 A GB1509014 A GB 1509014A
Authority
GB
United Kingdom
Prior art keywords
continuous
data
network
dee
state
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
GB21384/75A
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of GB1509014A publication Critical patent/GB1509014A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H04L5/16—Half-duplex systems; Simplex/duplex switching; Transmission of break signals non-automatically inverting the direction of transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/12—Arrangements for remote connection or disconnection of substations or of equipment thereof
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/50—Reducing energy consumption in communication networks in wire-line communication networks, e.g. low power modes or reduced link rate

Abstract

1509014 Data transmission SIEMENS AG 20 May 1975 [22 May 1974] 21384/75 Heading H4P Data terminal devices DEE are connected to a data network DN by way of respective devices DU and lines 103 to 114 carrying interface and control signals. Each device DU includes a device SW for the modified transmission of data signals, derived from its associated terminal device DEE, to the network DN over a line DS1 the arrangement being such that no continuous 0-states or continuous 1-states are applied to the network DN by this device SW; a device SRW for the reception and restoration into their original form of modified signals from other devices connected to the network DN; a switching device Ss0 which can bypass device SW to supply a continuous 0-state to the transmitting line DS1; a circuit Se0 serving to recognize any such continuous 0-state occurring on the receiving line DE1 and, upon recognition, to clear the connection in known manner over a device SD; a switching device Ssl which, when the terminal device DEE is not in a transmitting mode, supplies a continuous 1-state to the transmitting line DS 1 and which, when the device DEE is in a transmitting mode, causes the device SW to be switched on via a control input E/A; a circuit Sel responsive to the reception of a continuous 1-state; and a circuit t which delays the initiation of transmission of data from one terminal device to another for a time sufficient for the second device to become ready for operation. The specification describes how this arrangement enables semiduplex devices to be operated and controlled when connected to a data network possessing only fullduplex transmission paths.
GB21384/75A 1974-05-22 1975-05-20 Data transmission systems Expired GB1509014A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19742424860 DE2424860B2 (en) 1974-05-22 1974-05-22 PROCEDURE FOR CONNECTING SYNCHRONOUS DATA END DEVICES WITH SEMI-DUPLEX INTERFACES TO A DATA NETWORK

Publications (1)

Publication Number Publication Date
GB1509014A true GB1509014A (en) 1978-04-26

Family

ID=5916238

Family Applications (1)

Application Number Title Priority Date Filing Date
GB21384/75A Expired GB1509014A (en) 1974-05-22 1975-05-20 Data transmission systems

Country Status (10)

Country Link
AT (1) AT339385B (en)
BE (1) BE829365A (en)
CH (1) CH591191A5 (en)
DE (1) DE2424860B2 (en)
DK (1) DK223275A (en)
FR (1) FR2272548B1 (en)
GB (1) GB1509014A (en)
IT (1) IT1038227B (en)
NL (1) NL7506040A (en)
SE (1) SE400007B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2548693B2 (en) * 1985-03-13 1996-10-30 キヤノン株式会社 Serial data communication system and device
DE3733467A1 (en) * 1987-09-30 1989-04-20 Siemens Ag Circuit arrangement for switching through point-to-point links in communication networks

Also Published As

Publication number Publication date
SE400007B (en) 1978-03-06
CH591191A5 (en) 1977-09-15
NL7506040A (en) 1975-11-25
DE2424860B2 (en) 1977-06-30
AT339385B (en) 1977-10-10
SE7505784L (en) 1975-11-24
ATA347275A (en) 1977-02-15
FR2272548A1 (en) 1975-12-19
BE829365A (en) 1975-11-24
FR2272548B1 (en) 1979-06-15
DK223275A (en) 1975-11-23
DE2424860A1 (en) 1975-12-11
IT1038227B (en) 1979-11-20

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee