Classifications

• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04Q—SELECTING
  • H04Q3/00—Selecting arrangements
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04M—TELEPHONIC COMMUNICATION
  • H04M3/00—Automatic or semi-automatic exchanges
  • H04M3/60—Semi-automatic systems, i.e. in which the numerical selection of the outgoing line is under the control of an operator
  • H04M3/62—Keyboard equipment

Landscapes

• Engineering & Computer Science (AREA)
• Computer Networks & Wireless Communication (AREA)
• Signal Processing (AREA)
• Time-Division Multiplex Systems (AREA)
• Exchange Systems With Centralized Control (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=9073681

Family Applications (1)

Country Status (8)

• 1971
  • 1971-03-17 FR FR7109327A patent/FR2129160A5/fr not_active Expired
• 1972
  • 1972-03-01 CH CH302272A patent/CH559492A5/xx not_active IP Right Cessation
  • 1972-03-02 BE BE780114A patent/BE780114A/xx unknown
  • 1972-03-15 IT IT6781972A patent/IT952986B/it active
  • 1972-03-16 GB GB1225072A patent/GB1380461A/en not_active Expired
  • 1972-03-16 SE SE339672A patent/SE385258B/xx unknown
  • 1972-03-16 NL NL7203468A patent/NL7203468A/xx not_active Application Discontinuation
  • 1972-03-16 DE DE19722212841 patent/DE2212841A1/de not_active Withdrawn

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