GB562870A - Improvements in telephone or like systems - Google Patents

Improvements in telephone or like systems

Info

Publication number
GB562870A
GB562870A GB696/43A GB69643A GB562870A GB 562870 A GB562870 A GB 562870A GB 696/43 A GB696/43 A GB 696/43A GB 69643 A GB69643 A GB 69643A GB 562870 A GB562870 A GB 562870A
Authority
GB
United Kingdom
Prior art keywords
line
signalling
telephone
circuit
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
GB696/43A
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.)
Automatic Telephone and Electric Co Ltd
Original Assignee
Automatic Telephone and Electric Co 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
Priority to BE466622D priority Critical patent/BE466622A/xx
Priority to DES10940D priority patent/DE861271C/en
Application filed by Automatic Telephone and Electric Co Ltd filed Critical Automatic Telephone and Electric Co Ltd
Priority to GB696/43A priority patent/GB562870A/en
Priority to US514810A priority patent/US2380232A/en
Publication of GB562870A publication Critical patent/GB562870A/en
Priority to FR930147D priority patent/FR930147A/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
    • H04J1/16—Monitoring arrangements
    • 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
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • 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
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/446—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency
    • H04Q1/4465—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency the same frequency being used for all signalling information, e.g. A.C. nr.9 system

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)

Abstract

562,870. Automatic exchange systems. AUTOMATIC TELEPHONE & ELECTRIC CO., Ltd., GILLINGS, C., and COWLEY, P.E.A. Jan. 14, 1943, No. 696. [Class 40 (iv)] In a system employing voice-frequency supervisory signalling in which the operation of a signal receiver produces a blocking effect to prevent the signal passing further along the line, a single receiver responsive to signals in either direction is connected to the line on both sides of the blocking point by means of a hybrid coil HT, Fig. 1, or of two transformers T1, T2, Fig. 2, the secondaries of which are in series in the grid circuit of a thermionic valve LV. The operation of the responding relay CA (not shown) places a shunt across the line and terminates the signalling circuit in suitable resistances, as described in Specification 560,807.
GB696/43A 1943-01-08 1943-01-14 Improvements in telephone or like systems Expired GB562870A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
BE466622D BE466622A (en) 1943-01-14
DES10940D DE861271C (en) 1943-01-08 1943-01-08 Electrical signal receiver
GB696/43A GB562870A (en) 1943-01-14 1943-01-14 Improvements in telephone or like systems
US514810A US2380232A (en) 1943-01-14 1943-12-18 Telephone or like system
FR930147D FR930147A (en) 1943-01-14 1946-07-02 Telephone device or similar device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB696/43A GB562870A (en) 1943-01-14 1943-01-14 Improvements in telephone or like systems

Publications (1)

Publication Number Publication Date
GB562870A true GB562870A (en) 1944-07-19

Family

ID=9708927

Family Applications (1)

Application Number Title Priority Date Filing Date
GB696/43A Expired GB562870A (en) 1943-01-08 1943-01-14 Improvements in telephone or like systems

Country Status (4)

Country Link
US (1) US2380232A (en)
BE (1) BE466622A (en)
FR (1) FR930147A (en)
GB (1) GB562870A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2566700A (en) * 1946-10-30 1951-09-04 Rca Corp Stereoscopic and stereosonic television system
DE967406C (en) * 1952-08-03 1957-11-07 Standard Elek K Ag Circuit arrangement for signaling by means of alternating current of any frequency

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE454346A (en) * 1943-03-08
FR952401A (en) * 1943-04-22 1949-11-16 Telecommunications Sa Device for the transmission of call and end of conversation signals over long distance telephone circuits
US2972019A (en) * 1956-10-04 1961-02-14 Gen Dynamics Corp Automatic telephony ringing circuit
US3036163A (en) * 1959-05-15 1962-05-22 Bell Telephone Labor Inc Signaling system
US4517223A (en) * 1982-09-24 1985-05-14 Sovonics Solar Systems Method of making amorphous semiconductor alloys and devices using microwave energy

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2566700A (en) * 1946-10-30 1951-09-04 Rca Corp Stereoscopic and stereosonic television system
DE967406C (en) * 1952-08-03 1957-11-07 Standard Elek K Ag Circuit arrangement for signaling by means of alternating current of any frequency

Also Published As

Publication number Publication date
FR930147A (en) 1948-01-16
BE466622A (en)
US2380232A (en) 1945-07-10

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