IT947850B - TELEPHONE EXCHANGE - Google Patents

TELEPHONE EXCHANGE

Info

Publication number
IT947850B
IT947850B IT2096872A IT2096872A IT947850B IT 947850 B IT947850 B IT 947850B IT 2096872 A IT2096872 A IT 2096872A IT 2096872 A IT2096872 A IT 2096872A IT 947850 B IT947850 B IT 947850B
Authority
IT
Italy
Prior art keywords
telephone exchange
telephone
exchange
Prior art date
Application number
IT2096872A
Other languages
Italian (it)
Original Assignee
Central Telephone
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 Central Telephone filed Critical Central Telephone
Application granted granted Critical
Publication of IT947850B publication Critical patent/IT947850B/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H04M1/6033—Substation equipment, e.g. for use by subscribers including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
IT2096872A 1971-12-15 1972-02-24 TELEPHONE EXCHANGE IT947850B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7145024A FR2165032A5 (en) 1971-12-15 1971-12-15

Publications (1)

Publication Number Publication Date
IT947850B true IT947850B (en) 1973-05-30

Family

ID=9087507

Family Applications (1)

Application Number Title Priority Date Filing Date
IT2096872A IT947850B (en) 1971-12-15 1972-02-24 TELEPHONE EXCHANGE

Country Status (4)

Country Link
DE (1) DE2208693A1 (en)
FR (1) FR2165032A5 (en)
GB (1) GB1379664A (en)
IT (1) IT947850B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4488006A (en) * 1982-07-01 1984-12-11 At&T Bell Laboratories Apparatus for controlling the application of telephone line power in a telephone set

Also Published As

Publication number Publication date
GB1379664A (en) 1975-01-08
FR2165032A5 (en) 1973-08-03
DE2208693A1 (en) 1973-06-28

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