GB667331A - Improvements in or relating to a system of testing a telecommunication system - Google Patents

Improvements in or relating to a system of testing a telecommunication system

Info

Publication number
GB667331A
GB667331A GB4484/50A GB448450A GB667331A GB 667331 A GB667331 A GB 667331A GB 4484/50 A GB4484/50 A GB 4484/50A GB 448450 A GB448450 A GB 448450A GB 667331 A GB667331 A GB 667331A
Authority
GB
United Kingdom
Prior art keywords
lines
repeater
equipments
wave
signals
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
GB4484/50A
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.)
Societe Anonyme de Telecommunications SAT
Original Assignee
Societe Anonyme de Telecommunications SAT
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 Societe Anonyme de Telecommunications SAT filed Critical Societe Anonyme de Telecommunications SAT
Publication of GB667331A publication Critical patent/GB667331A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/46—Monitoring; Testing

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Measurement Of Resistance Or Impedance (AREA)

Abstract

667,331. Determining condition of telephone lines. SOC. ANON. DE TELECOMMUNICATIONS. Feb. 21, 1950 [March 25, 1949; Jan. 3, 1950], No. 4484/50. Class 37. Relates to two-way transmission systems in which signals in one direction along line 1 occupy one wave-band and signals in the other direction along line 2 occupy another waveband; according to the invention, at test frequency lying between the two wave-bands is transmitted from 4 and passes over a tuned coupling 5 for transmission back to 9 where its amplitude is compared with that of the original signal to determine whether the lines and repeaters are satisfactory. The equipments 4, 9, may be switched so as to test a plurality of lines, Fig. 3 (not shown). If equipments 4, 9 are available at a repeater, by applying them to the input and output, the gain may be measured. An equipment 9 at any repeater may be used to indicate transmission level.
GB4484/50A 1949-03-25 1950-02-21 Improvements in or relating to a system of testing a telecommunication system Expired GB667331A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR667331X 1949-03-25

Publications (1)

Publication Number Publication Date
GB667331A true GB667331A (en) 1952-02-27

Family

ID=9014331

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4484/50A Expired GB667331A (en) 1949-03-25 1950-02-21 Improvements in or relating to a system of testing a telecommunication system

Country Status (2)

Country Link
DE (1) DE826600C (en)
GB (1) GB667331A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE943476C (en) * 1952-07-15 1956-05-24 Felten & Guilleaume Carlswerk Arrangement for remote switching of amplifiers in unmanned intermediate stations
DE1033725B (en) * 1956-08-31 1958-07-10 Siemens Ag Arrangement for measuring and monitoring the residual loss of a communication link based on the principle of a loop measurement
DE1168506B (en) * 1961-09-15 1964-04-23 Siemens Ag Circuit arrangement for testing signal channels in telecommunications systems
DE1218010B (en) * 1963-06-11 1966-06-02 Gottfried Neumann Procedure for the central function test of exchange, counter and loudspeaker systems

Also Published As

Publication number Publication date
DE826600C (en) 1952-01-03

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