FR702872A - Telephone link systems between "step by step" offices and return control offices - Google Patents

Telephone link systems between "step by step" offices and return control offices

Info

Publication number
FR702872A
FR702872A FR702872DA FR702872A FR 702872 A FR702872 A FR 702872A FR 702872D A FR702872D A FR 702872DA FR 702872 A FR702872 A FR 702872A
Authority
FR
France
Prior art keywords
offices
return control
telephone link
link systems
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
Other languages
French (fr)
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.)
Compagnie Francaise Thomson Houston SA
Original Assignee
Compagnie Francaise Thomson Houston 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 Compagnie Francaise Thomson Houston SA filed Critical Compagnie Francaise Thomson Houston SA
Application granted granted Critical
Publication of FR702872A publication Critical patent/FR702872A/en
Expired legal-status Critical Current

Links

Classifications

    • 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)
  • Exchange Systems With Centralized Control (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Relay Circuits (AREA)
FR702872D 1927-08-09 1928-08-09 Telephone link systems between "step by step" offices and return control offices Expired FR702872A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB21042/27A GB302200A (en) 1927-08-09 1927-08-09 Improvements in or relating to automatic or semi-automatic telephone systems

Publications (1)

Publication Number Publication Date
FR702872A true FR702872A (en) 1931-04-18

Family

ID=10156190

Family Applications (2)

Application Number Title Priority Date Filing Date
FR39002D Expired FR39002E (en) 1927-08-09
FR702872D Expired FR702872A (en) 1927-08-09 1928-08-09 Telephone link systems between "step by step" offices and return control offices

Family Applications Before (1)

Application Number Title Priority Date Filing Date
FR39002D Expired FR39002E (en) 1927-08-09

Country Status (3)

Country Link
US (1) US1837003A (en)
FR (2) FR702872A (en)
GB (2) GB302217A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL71657C (en) * 1940-06-11
US2421717A (en) * 1943-04-28 1947-06-03 Kellogg Switchboard & Supply Automatic telephone system
GB577648A (en) * 1944-04-01 1946-05-27 Automatic Telephone & Elect Improvements in or relating to telephone systems
GB586380A (en) * 1944-12-08 1947-03-17 Automatic Telephone & Elect Improvements in telephone systems

Also Published As

Publication number Publication date
GB302200A (en) 1928-12-10
FR39002E (en) 1931-08-25
US1837003A (en) 1931-12-15
GB302217A (en) 1928-12-10

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