CH233307A - Equipement de central téléphonique interurbain. - Google Patents

Equipement de central téléphonique interurbain.

Info

Publication number
CH233307A
CH233307A CH233307DA CH233307A CH 233307 A CH233307 A CH 233307A CH 233307D A CH233307D A CH 233307DA CH 233307 A CH233307 A CH 233307A
Authority
CH
Switzerland
Prior art keywords
long distance
telephone exchange
exchange equipment
distance telephone
equipment
Prior art date
Application number
Other languages
English (en)
French (fr)
Inventor
Bell Telephone Manufac Anonyme
Original Assignee
Bell Telephone Mfg
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 Bell Telephone Mfg filed Critical Bell Telephone Mfg
Publication of CH233307A publication Critical patent/CH233307A/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/40—Applications of speech amplifiers

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
CH233307D 1938-12-14 1940-02-07 Equipement de central téléphonique interurbain. CH233307A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB233307X 1938-12-14

Publications (1)

Publication Number Publication Date
CH233307A true CH233307A (fr) 1944-07-15

Family

ID=10193869

Family Applications (1)

Application Number Title Priority Date Filing Date
CH233307D CH233307A (fr) 1938-12-14 1940-02-07 Equipement de central téléphonique interurbain.

Country Status (4)

Country Link
BE (1) BE437367A (en))
CH (1) CH233307A (en))
FR (1) FR862315A (en))
NL (1) NL61476C (en))

Also Published As

Publication number Publication date
BE437367A (en))
NL61476C (en))
FR862315A (fr) 1941-03-04

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