GB581284A - Improvements in or relating to telephone systems - Google Patents

Improvements in or relating to telephone systems

Info

Publication number
GB581284A
GB581284A GB15985/44A GB1598544A GB581284A GB 581284 A GB581284 A GB 581284A GB 15985/44 A GB15985/44 A GB 15985/44A GB 1598544 A GB1598544 A GB 1598544A GB 581284 A GB581284 A GB 581284A
Authority
GB
United Kingdom
Prior art keywords
relay
operator
junction
relays
signal
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
GB15985/44A
Other languages
English (en)
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
Application filed by Automatic Telephone and Electric Co Ltd filed Critical Automatic Telephone and Electric Co Ltd
Publication of GB581284A publication Critical patent/GB581284A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/40—Applications of speech amplifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/0016—Arrangements providing connection between exchanges

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)
GB15985/44A 1943-10-21 1944-08-22 Improvements in or relating to telephone systems Expired GB581284A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US507067A US2398854A (en) 1943-10-21 1943-10-21 Telephone system

Publications (1)

Publication Number Publication Date
GB581284A true GB581284A (en) 1946-10-08

Family

ID=24017122

Family Applications (1)

Application Number Title Priority Date Filing Date
GB15985/44A Expired GB581284A (en) 1943-10-21 1944-08-22 Improvements in or relating to telephone systems

Country Status (4)

Country Link
US (1) US2398854A (enrdf_load_stackoverflow)
BE (1) BE466555A (enrdf_load_stackoverflow)
FR (1) FR938261A (enrdf_load_stackoverflow)
GB (1) GB581284A (enrdf_load_stackoverflow)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2564084A (en) * 1946-11-02 1951-08-14 Automatic Elect Lab Telephone system having repeater insertion on long distance lines
US2580709A (en) * 1947-11-14 1952-01-01 Automatic Elect Lab Toll switching telephone system having automatic amplifier insertion and gain setting
US2682577A (en) * 1951-11-05 1954-06-29 Itt Discriminating circuits for dualpurpose trunks
US2781418A (en) * 1953-01-30 1957-02-12 Gen Dynamics Corp Automatic telephone system
US3689704A (en) * 1969-12-17 1972-09-05 Itt Constant current output controlled repeater insertion

Also Published As

Publication number Publication date
US2398854A (en) 1946-04-23
FR938261A (fr) 1948-09-09
BE466555A (enrdf_load_stackoverflow)

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