FR647442A - Automatic call device for domestic telephone installations - Google Patents

Automatic call device for domestic telephone installations

Info

Publication number
FR647442A
FR647442A FR647442DA FR647442A FR 647442 A FR647442 A FR 647442A FR 647442D A FR647442D A FR 647442DA FR 647442 A FR647442 A FR 647442A
Authority
FR
France
Prior art keywords
call device
automatic call
domestic telephone
telephone installations
installations
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.)
HASLER CI DEVANT L ATELIER DES
Original Assignee
HASLER CI DEVANT L ATELIER DES
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 HASLER CI DEVANT L ATELIER DES filed Critical HASLER CI DEVANT L ATELIER DES
Application granted granted Critical
Publication of FR647442A publication Critical patent/FR647442A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/58—Arrangements providing connection between main exchange and sub-exchange or satellite
    • H04Q3/62—Arrangements providing connection between main exchange and sub-exchange or satellite for connecting to private branch exchanges
    • H04Q3/625—Arrangements in the private branch exchange

Landscapes

  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Telephonic Communication Services (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Mobile Radio Communication Systems (AREA)
FR647442D 1928-01-03 1928-01-18 Automatic call device for domestic telephone installations Expired FR647442A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB16228A GB290937A (en) 1928-01-03 1928-01-03 Improvements in or relating to electric telephone installations

Publications (1)

Publication Number Publication Date
FR647442A true FR647442A (en) 1928-11-23

Family

ID=9699489

Family Applications (1)

Application Number Title Priority Date Filing Date
FR647442D Expired FR647442A (en) 1928-01-03 1928-01-18 Automatic call device for domestic telephone installations

Country Status (2)

Country Link
FR (1) FR647442A (en)
GB (1) GB290937A (en)

Also Published As

Publication number Publication date
GB290937A (en) 1928-05-24

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