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GB1268366A - Telecommunication switching centre - Google Patents

Telecommunication switching centre

Info

Publication number
GB1268366A
GB1268366A GB5639168A GB5639168A GB1268366A GB 1268366 A GB1268366 A GB 1268366A GB 5639168 A GB5639168 A GB 5639168A GB 5639168 A GB5639168 A GB 5639168A GB 1268366 A GB1268366 A GB 1268366A
Authority
GB
United Kingdom
Prior art keywords
telegraph
rate
store
modulator
passed
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
GB5639168A
Inventor
Roy Charles Thorncroft
Frank William Simpson
Alan John Jewitt
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 GB5639168A priority Critical patent/GB1268366A/en
Priority to GB2470869A priority patent/GB1243874A/en
Priority to DE19691958599 priority patent/DE1958599A1/en
Priority to ES373944A priority patent/ES373944A1/en
Priority to CH1764469A priority patent/CH514258A/en
Priority to FR6940862A priority patent/FR2024372A1/fr
Priority to FR7017403A priority patent/FR2047703A5/fr
Publication of GB1268366A publication Critical patent/GB1268366A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/12—Arrangements providing for calling or supervisory signals
    • 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
    • H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
    • 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
    • H04L5/22—Arrangements affording multiple use of the transmission path using time-division multiplexing
    • 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
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Communication Control (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)

Abstract

1,268,366. Digital transmission systems. STANDARD TELEPHONES & CABLES Ltd. 20 Nov., 1969 [27 Nov., 1968], No. 56391/68. Heading H4P. In a telecommunication system which includes a switching centre having incoming and outgoing TDM highways in which speech and other signals are conveyed by a relatively high rate bit stream, and in which telegraph signals are also conveyed at a rate lower than the high bit rate, so that each telegraph element embraces several bits of the stream, the sign of each telegraph element is detected by a device which samples each element a number of times N and passes the results of said sampling to a store where a majority decision circuit determines the sign of each element when more than N/2 samplings are of the same sign. The system may handle telegraph traffic having a number of different element rates. The results of the sampling may be passed to an N bit shift register and if N = 8 then if 5 or more samplings indicate say a " 1 " condition the result is passed to a store. This arrangement can therefore tolerate three errors in eight. The channels are interconnected by coordinate matrix switches and telegraph signals are demodulated and stored until an outlet is available when they are modulated at bit rate in conventional manner. Each TDM channel may have a basic repetition rate of 19À2K baud which is de-multiplexed via the cross point device of the switch CS and passed to a de-modulator DE connectible to each switch vertical and a modulator MO having access to a switch horizontal, both demodulator and modulator working into a storage processor device SP having a means to identify the bit rate. For other repetition rates the clock pulses are also adjusted to run at eight times the information rate. The requirements of modulator MO are simpler than that for the demodulator as information reaching it from the store is assumed to be correct. Information may be transferred to or from the store either one character at a time or in blocks.
GB5639168A 1968-11-27 1968-11-27 Telecommunication switching centre Expired GB1268366A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
GB5639168A GB1268366A (en) 1968-11-27 1968-11-27 Telecommunication switching centre
GB2470869A GB1243874A (en) 1968-11-27 1969-05-14 Improvements in or relating to signalling systems
DE19691958599 DE1958599A1 (en) 1968-11-27 1969-11-21 Communication method for telecommunication systems
ES373944A ES373944A1 (en) 1968-11-27 1969-11-26 Improvements in, or relative to, telecommunication systems. (Machine-translation by Google Translate, not legally binding)
CH1764469A CH514258A (en) 1968-11-27 1969-11-27 Method and system for determining the character or pause status of an element of a telegraphic message
FR6940862A FR2024372A1 (en) 1968-11-27 1969-11-27
FR7017403A FR2047703A5 (en) 1968-11-27 1970-05-13

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB5639168A GB1268366A (en) 1968-11-27 1968-11-27 Telecommunication switching centre
GB2470869A GB1243874A (en) 1968-11-27 1969-05-14 Improvements in or relating to signalling systems

Publications (1)

Publication Number Publication Date
GB1268366A true GB1268366A (en) 1972-03-29

Family

ID=26257252

Family Applications (2)

Application Number Title Priority Date Filing Date
GB5639168A Expired GB1268366A (en) 1968-11-27 1968-11-27 Telecommunication switching centre
GB2470869A Expired GB1243874A (en) 1968-11-27 1969-05-14 Improvements in or relating to signalling systems

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB2470869A Expired GB1243874A (en) 1968-11-27 1969-05-14 Improvements in or relating to signalling systems

Country Status (4)

Country Link
CH (1) CH514258A (en)
DE (1) DE1958599A1 (en)
FR (2) FR2024372A1 (en)
GB (2) GB1268366A (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3036612A1 (en) * 1980-09-29 1982-05-13 Siemens AG, 1000 Berlin und 8000 München METHOD FOR DETECTING DIGITAL INFORMATION IN DIGITAL INFORMATION TRANSFER, IN PARTICULAR INFORMATION TRANSFER IN MOBILE RADIO COMMUNICATION SYSTEMS
DE3036614A1 (en) * 1980-09-29 1982-05-13 Siemens AG, 1000 Berlin und 8000 München METHOD FOR DETECTING DIGITAL INFORMATION IN DIGITAL INFORMATION TRANSFER, IN PARTICULAR INFORMATION TRANSFER IN MOBILE RADIO COMMUNICATION SYSTEMS
DE3036655A1 (en) * 1980-09-29 1982-05-13 Siemens AG, 1000 Berlin und 8000 München METHOD FOR DETECTING DIGITAL INFORMATION IN DIGITAL INFORMATION TRANSFER, IN PARTICULAR INFORMATION TRANSFER IN MOBILE RADIO COMMUNICATION SYSTEMS
CH651709A5 (en) * 1980-11-04 1985-09-30 Landis & Gyr Ag METHOD AND DEVICE FOR EQUALIZING BINARY RECEPTION SIGNALS.
US4509180A (en) * 1982-03-15 1985-04-02 Lgz Landis & Gyr Zug Ag Method and an apparatus for correcting distortion of binary received signals
DE4307686A1 (en) * 1993-03-11 1994-09-15 Inst Rundfunktechnik Gmbh Method of processing a serial digital data signal
DE4408963A1 (en) * 1994-03-16 1995-09-21 Inst Rundfunktechnik Gmbh Method for processing a serial, digital data signal
DE19534693A1 (en) * 1995-09-19 1997-03-20 Phoenix Contact Gmbh & Co Subscriber synchronisation system especially for asynchronous serial by bit data transmission
DE19843980B4 (en) * 1998-09-24 2004-11-25 Micronas Munich Gmbh Circuit arrangement for suppressing interference impulses superimposed on a digital signal
DE102004019751A1 (en) 2004-04-23 2005-11-17 Henkel Kgaa Novel Alkaline Proteases and Detergents Containing These Novel Alkaline Proteases

Also Published As

Publication number Publication date
DE1958599A1 (en) 1970-09-03
CH514258A (en) 1971-10-15
GB1243874A (en) 1971-08-25
FR2047703A5 (en) 1971-03-12
FR2024372A1 (en) 1970-08-28

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