Classifications

• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04Q—SELECTING
  • H04Q3/00—Selecting arrangements
  • H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker
  • H04Q3/52—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker using static devices in switching stages, e.g. electronic switching arrangements
  • H04Q3/521—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker using static devices in switching stages, e.g. electronic switching arrangements using semiconductors in the switching stages
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04M—TELEPHONIC COMMUNICATION
  • H04M19/00—Current supply arrangements for telephone systems
  • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04Q—SELECTING
  • H04Q1/00—Details of selecting apparatus or arrangements
  • H04Q1/18—Electrical details
  • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
  • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
  • H04Q1/442—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies
  • H04Q1/4423—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies using one signalling frequency

Landscapes

• Engineering & Computer Science (AREA)
• Computer Networks & Wireless Communication (AREA)
• Signal Processing (AREA)
• Devices For Supply Of Signal Current (AREA)
• Preparation Of Compounds By Using Micro-Organisms (AREA)
• Amplifiers (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=19751383

Family Applications (2)

Family Applications Before (1)

Country Status (6)

Families Citing this family (1)

Family Cites Families (1)

• 0
  • NL NL104005D patent/NL104005C/xx active
  • NL NL232178D patent/NL232178A/xx unknown
• 1934
  • 1934-10-07 JP JP3155459A patent/JPS3623516B1/ja active Pending
• 1959
  • 1959-10-07 GB GB34006/59A patent/GB912755A/en not_active Expired
  • 1959-10-07 CH CH7914059A patent/CH375046A/de unknown
  • 1959-10-07 DE DEN17352A patent/DE1146925B/de active Pending
  • 1959-10-08 FR FR806988A patent/FR1237437A/fr not_active Expired

Also Published As

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