Classifications

• • 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
• • 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
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04Q—SELECTING
  • H04Q3/00—Selecting arrangements
  • H04Q3/0004—Selecting arrangements using crossbar selectors in the switching stages

Landscapes

• Engineering & Computer Science (AREA)
• Signal Processing (AREA)
• Computer Networks & Wireless Communication (AREA)
• Sub-Exchange Stations And Push- Button Telephones (AREA)
• Interconnected Communication Systems, Intercoms, And Interphones (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=20260761

Family Applications (1)

Country Status (6)

Family Cites Families (4)

• 0
  • DE DENDAT1303458D patent/DE1303458B/de active Pending
  • BE BE629618D patent/BE629618A/xx unknown
  • NL NL290179D patent/NL290179A/xx unknown
• 1963
  • 1963-03-13 GB GB9975/63A patent/GB1032277A/en not_active Expired
  • 1963-03-13 US US264816A patent/US3296380A/en not_active Expired - Lifetime
  • 1963-03-14 CH CH322163A patent/CH434370A/de unknown

Also Published As

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