GB1242291A - Improvements in or relating to data exchange systems - Google Patents

Improvements in or relating to data exchange systems

Info

Publication number
GB1242291A
GB1242291A GB1805969A GB1805969A GB1242291A GB 1242291 A GB1242291 A GB 1242291A GB 1805969 A GB1805969 A GB 1805969A GB 1805969 A GB1805969 A GB 1805969A GB 1242291 A GB1242291 A GB 1242291A
Authority
GB
United Kingdom
Prior art keywords
channel
channels
information
signal
group
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
GB1805969A
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 GB1242291A publication Critical patent/GB1242291A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/50—Circuit switching systems, i.e. systems in which the path is physically permanent during the communication

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Telephonic Communication Services (AREA)
  • Communication Control (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

1,242,291. Digital transmission systems. SIEMENS A.G. 9 April, 1969 [10 April, 1968], No. 18059/69. Addition to 1,210,733. Heading H4P. In a digital transmission system employing transparent transmission and comprising a programmed exchange, and in which duration significant signals, such as calling signals, are transmitted in a code form which is not duration significant, the coded control signals are transmitted over a channel common to a group of information channels, which is assigned to one or more of these information channels as required for a limited time. Each control signal is accompanied by a signal indicating the information channel to which it is relevant. Allotting the control signal channel to a seized information channel is initiated by a signal sent to the exchange by the subscriber and the channel may remain allotted until the information channel is released. The control channel may be common to one or more groups of channels or there may be several control channels to each group. A counter at the exchange determines the number of transparent information channels in use in a group of channels, and an engaged signal is sent to any subscriber requesting a transparent channel when a preset number is exceeded.
GB1805969A 1968-04-10 1969-04-09 Improvements in or relating to data exchange systems Expired GB1242291A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH539668A CH493181A (en) 1968-04-10 1968-04-10 Process for the formation and transmission of signaling criteria in data switching systems with transparent message transmission

Publications (1)

Publication Number Publication Date
GB1242291A true GB1242291A (en) 1971-08-11

Family

ID=4292864

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1805969A Expired GB1242291A (en) 1968-04-10 1969-04-09 Improvements in or relating to data exchange systems

Country Status (5)

Country Link
BE (1) BE731331A (en)
CH (1) CH493181A (en)
FR (1) FR96196E (en)
GB (1) GB1242291A (en)
SE (1) SE365926B (en)

Also Published As

Publication number Publication date
CH493181A (en) 1970-06-30
DE1918089B2 (en) 1977-03-17
BE731331A (en) 1969-10-10
FR96196E (en) 1972-05-19
DE1918089A1 (en) 1969-10-23
SE365926B (en) 1974-04-01

Similar Documents

Publication Publication Date Title
GB1093575A (en) Improvements in and relating to arrangements for ciphering and deciphering information in pulse form
GB1001903A (en) Improvements in or relating to automatic telecommunication exchanges
CA997489A (en) Time slot automatic distributor in a multiplex system for telegraph or data signal transmission
GB1243874A (en) Improvements in or relating to signalling systems
GB1242291A (en) Improvements in or relating to data exchange systems
GB967643A (en) Improvements in or relating to digital message transmission systems
GB1034514A (en) Improvements in or relating to telecommunications systems exchanges
GB1210733A (en) Improvements in and relating to data exchange systems
GB1164976A (en) Improvements in or relating to Time-Division Multiplex Data Exchange Systems.
GB1322445A (en) Data exchange systems
JPS52120709A (en) Common line signal system
CA782006A (en) Control system for telephone signalling transmission
AU280920B2 (en) Common control automatic telephone exchange system
GB996835A (en) Multi-frequency code signalling method
AU3571663A (en) Common control automatic telephone exchange system
GB1069246A (en) Improvements in or relating to data processing systems
AU2768263A (en) Transmission control in signalling system
CA629264A (en) Arrangement for automatic signalling system intended for transmitting voice-frequency calling signals
CA1002641A (en) Switching system order distributor
AU405769B2 (en) Information transmission system
AU270728B2 (en) Improvements relating top. b. x. final selector arrangements in automatic telephone exchange systems
GB923453A (en) Improvements relating to telecommunication systems
CA692497A (en) Signalling methods between subscribers' sets and exchange
JPS56122550A (en) Data switching system for time division circuit
DK123900B (en) Transmission station for pulse code modulated time division multiplex signals or computer controlled telephone system comprising such a transmission station.