GB707030A - Improvements in or relating to single-sideband carrier-wave telephone systems - Google Patents

Improvements in or relating to single-sideband carrier-wave telephone systems

Info

Publication number
GB707030A
GB707030A GB9079/52A GB907952A GB707030A GB 707030 A GB707030 A GB 707030A GB 9079/52 A GB9079/52 A GB 9079/52A GB 907952 A GB907952 A GB 907952A GB 707030 A GB707030 A GB 707030A
Authority
GB
United Kingdom
Prior art keywords
group
carrier
relating
april
telephone systems
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
GB9079/52A
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.)
Philips Electrical Industries Ltd
Original Assignee
Philips Electrical Industries Ltd
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 Philips Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB707030A publication Critical patent/GB707030A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J1/00—Frequency-division multiplex systems
    • H04J1/02—Details
    • H04J1/04—Frequency-transposition arrangements

Abstract

707,030. Multiplex systems. PHILIPS ELECTRICAL INDUSTRIES, Ltd. April 9, 1952 [April 12, 1951], No. 9079/52. Drawings to Specification. Class 40 (4) A single sideband carrier multiplex telephone system has two adjacent pairs of conductors, and through each pair a group of speech channels is transmitted in the same direction, the channels of the two groups being mutually staggered in frequency, while control signals such as dialling impulses are transmitted through the phantom circuit of the two pairs. The control signals for each channel are carried by an associated control carrier current, and a plurality of the control carrier frequencies of one group are equal to speech carrier frequencies of the other group. The invention is described with reference to a system in which transmission in the manner described above take place in both directions.
GB9079/52A 1951-04-12 1952-04-09 Improvements in or relating to single-sideband carrier-wave telephone systems Expired GB707030A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL707030X 1951-04-12

Publications (1)

Publication Number Publication Date
GB707030A true GB707030A (en) 1954-04-07

Family

ID=19812093

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9079/52A Expired GB707030A (en) 1951-04-12 1952-04-09 Improvements in or relating to single-sideband carrier-wave telephone systems

Country Status (3)

Country Link
DE (1) DE914262C (en)
FR (1) FR1062477A (en)
GB (1) GB707030A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2932694A (en) * 1954-09-10 1960-04-12 Bell Telephone Labor Inc Rural carrier telephone transmission system
DE1220912B (en) * 1962-07-05 1966-07-14 Siemens Ag Messaging system
DE1168490B (en) * 1962-09-24 1964-04-23 Siemens Ag Method for low-frequency radio transmission

Also Published As

Publication number Publication date
DE914262C (en) 1954-06-28
FR1062477A (en) 1954-04-23

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