FR682916A - Improvements in the arrangement of telephone devices - Google Patents

Improvements in the arrangement of telephone devices

Info

Publication number
FR682916A
FR682916A FR682916DA FR682916A FR 682916 A FR682916 A FR 682916A FR 682916D A FR682916D A FR 682916DA FR 682916 A FR682916 A FR 682916A
Authority
FR
France
Prior art keywords
arrangement
telephone devices
telephone
devices
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Application granted granted Critical
Publication of FR682916A publication Critical patent/FR682916A/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
    • H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/001—Two-way communication systems between a limited number of parties

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)
FR682916D 1928-10-12 1929-10-08 Improvements in the arrangement of telephone devices Expired FR682916A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE337556X 1928-10-12

Publications (1)

Publication Number Publication Date
FR682916A true FR682916A (en) 1930-06-04

Family

ID=20308273

Family Applications (1)

Application Number Title Priority Date Filing Date
FR682916D Expired FR682916A (en) 1928-10-12 1929-10-08 Improvements in the arrangement of telephone devices

Country Status (2)

Country Link
FR (1) FR682916A (en)
GB (1) GB337556A (en)

Also Published As

Publication number Publication date
GB337556A (en) 1930-11-06

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