FR352048A - Metal circuit system for telephone transmissions and other switching and calling purposes and apparatus - Google Patents

Metal circuit system for telephone transmissions and other switching and calling purposes and apparatus

Info

Publication number
FR352048A
FR352048A FR352048A FR352048DA FR352048A FR 352048 A FR352048 A FR 352048A FR 352048 A FR352048 A FR 352048A FR 352048D A FR352048D A FR 352048DA FR 352048 A FR352048 A FR 352048A
Authority
FR
France
Prior art keywords
switching
circuit system
metal circuit
telephone transmissions
calling purposes
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
FR352048A
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.)
DIRECT LINE GENERAL TELEPHONE
Original Assignee
DIRECT LINE GENERAL TELEPHONE
Filing date
Publication date
Application filed by DIRECT LINE GENERAL TELEPHONE filed Critical DIRECT LINE GENERAL TELEPHONE
Application granted granted Critical
Publication of FR352048A publication Critical patent/FR352048A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/002—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
FR352048A 1905-03-04 Metal circuit system for telephone transmissions and other switching and calling purposes and apparatus Expired FR352048A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE173104T

Publications (1)

Publication Number Publication Date
FR352048A true FR352048A (en) 1905-08-01

Family

ID=5690700

Family Applications (1)

Application Number Title Priority Date Filing Date
FR352048A Expired FR352048A (en) 1905-03-04 Metal circuit system for telephone transmissions and other switching and calling purposes and apparatus

Country Status (2)

Country Link
DE (1) DE173104C (en)
FR (1) FR352048A (en)

Also Published As

Publication number Publication date
DE173104C (en)

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