GB417054A - Improvements in or relating to cable communication systems - Google Patents

Improvements in or relating to cable communication systems

Info

Publication number
GB417054A
GB417054A GB877633A GB877633A GB417054A GB 417054 A GB417054 A GB 417054A GB 877633 A GB877633 A GB 877633A GB 877633 A GB877633 A GB 877633A GB 417054 A GB417054 A GB 417054A
Authority
GB
United Kingdom
Prior art keywords
cable
pairs
frequency
repeaters
cables
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
GB877633A
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.)
AT&T Corp
Original Assignee
Western Electric Co Inc
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
Priority to FR767419D priority Critical patent/FR767419A/fr
Priority to BE395669D priority patent/BE395669A/xx
Priority to US581742A priority patent/US1922138A/en
Application filed by Western Electric Co Inc filed Critical Western Electric Co Inc
Priority to GB877633A priority patent/GB417054A/en
Publication of GB417054A publication Critical patent/GB417054A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/32—Reducing cross-talk, e.g. by compensating
    • H04B3/34—Reducing cross-talk, e.g. by compensating by systematic interconnection of lengths of cable during laying; by addition of balancing components to cable during laying

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Near-Field Transmission Systems (AREA)

Abstract

417,054. Wired wireless signalling. STANDARD TELEPHONES & CABLES, Ltd., Connaught House, Aldwych, London.- (Western Electric Co., Inc. ; 195, Broadway, New York, U.S.A.) March 23, 1933, No. 8776. [Class 40 (v).] In a transmission system having a plurality of conductors arranged in a plurality of separate cables or shielded compartments of the same cable and repeaters therefor, the intervals between the repeaters varying with different individual conductors, in order to minimize cross-talk the conductors either of the repeatered line or of adjacent lines are transposed into a separate cable or section in the neighbourhood of a repeater. In a system employing two cables I, II, Fig. 1, the carrier-frequency conductors e, f respectively are repeatered at a station B the voice-frequency lines of cable I being transposed to cable II at this point and vice versa. In order that conductor pairs a, b entering cable I and pairs c, d entering cable II at A may leave the same cable at C further transpositions are effected as shown at points A<1> and C<1>, this particular arrangement ensuring the least interference with traffic should one of the cables be damaged at any point, the pairs a and c forming a four wire system with terminal a<1> and pairs band d forming a similar system with terminal at b<1>. The points A<1> and C<1> should be as far apart as other conditions will allow. In a system embodying a single cable with internal shield, the carrier-frequency lines e, f, Fig. 3, and voice-frequency pairs a, b, c, d are arranged so that the inputs from the repeaters at A and C are directed into the outer compartment and each repeater receives its input from an inner compartment. The repeaters at B in the carrier-frequency lines are so arranged that their inputs come from the inner compartment and the high level output circuit is in the outer compartment. The voice frequency circuits may be confined to a single compartment as shown in dotted lines.
GB877633A 1931-12-17 1933-03-23 Improvements in or relating to cable communication systems Expired GB417054A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
FR767419D FR767419A (en) 1933-03-23
BE395669D BE395669A (en) 1933-03-23
US581742A US1922138A (en) 1931-12-17 1931-12-17 System for transposition of conductor sets in cables
GB877633A GB417054A (en) 1933-03-23 1933-03-23 Improvements in or relating to cable communication systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB877633A GB417054A (en) 1933-03-23 1933-03-23 Improvements in or relating to cable communication systems

Publications (1)

Publication Number Publication Date
GB417054A true GB417054A (en) 1934-09-24

Family

ID=9859047

Family Applications (1)

Application Number Title Priority Date Filing Date
GB877633A Expired GB417054A (en) 1931-12-17 1933-03-23 Improvements in or relating to cable communication systems

Country Status (3)

Country Link
BE (1) BE395669A (en)
FR (1) FR767419A (en)
GB (1) GB417054A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE435395A (en) * 1938-07-15

Also Published As

Publication number Publication date
FR767419A (en) 1934-07-16
BE395669A (en)

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