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ES173251A1 - Mejoras en sistemas telefónicos automáticos - Google Patents

Mejoras en sistemas telefónicos automáticos

Info

Publication number
ES173251A1
ES173251A1 ES173251A ES173251A ES173251A1 ES 173251 A1 ES173251 A1 ES 173251A1 ES 173251 A ES173251 A ES 173251A ES 173251 A ES173251 A ES 173251A ES 173251 A1 ES173251 A1 ES 173251A1
Authority
ES
Spain
Prior art keywords
telephone systems
automatic telephone
automatic
systems
telephone
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
ES173251A
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.)
Nokia Spain SA
Original Assignee
Alcatel Espana SA
Standard Electrica SA
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 Alcatel Espana SA, Standard Electrica SA filed Critical Alcatel Espana SA
Publication of ES173251A1 publication Critical patent/ES173251A1/es
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
ES173251A 1945-03-12 1946-04-17 Mejoras en sistemas telefónicos automáticos Expired ES173251A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US582195A US2426210A (en) 1945-03-12 1945-03-12 Intercept operator's position for unassigned party line stations

Publications (1)

Publication Number Publication Date
ES173251A1 true ES173251A1 (es) 1946-05-16

Family

ID=24328192

Family Applications (1)

Application Number Title Priority Date Filing Date
ES173251A Expired ES173251A1 (es) 1945-03-12 1946-04-17 Mejoras en sistemas telefónicos automáticos

Country Status (5)

Country Link
US (1) US2426210A (es)
CH (1) CH262449A (es)
ES (1) ES173251A1 (es)
FR (1) FR923733A (es)
NL (1) NL76335C (es)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2871300A (en) * 1953-03-12 1959-01-27 Itt Intercept discriminator
US3909543A (en) * 1974-01-17 1975-09-30 Itt Disconnector circuit arrangement

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1727137A (en) * 1925-12-21 1929-09-03 Automatic Electric Inc Automatic telephone system
US1738059A (en) * 1926-09-22 1929-12-03 Automatic Electric Inc Telephone system
US2224497A (en) * 1939-04-15 1940-12-10 Associated Electric Lab Inc Telephone system
US2300186A (en) * 1941-03-29 1942-10-27 Kellogg Switchboard & Supply Telephone system
US2344634A (en) * 1942-01-08 1944-03-21 Stromberg Carlson Telephone Telephone intercept system

Also Published As

Publication number Publication date
CH262449A (de) 1949-06-30
NL76335C (es)
US2426210A (en) 1947-08-26
FR923733A (fr) 1947-07-16

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