JPS56169469A - Signal tone processing system - Google Patents

Signal tone processing system

Info

Publication number
JPS56169469A
JPS56169469A JP7220280A JP7220280A JPS56169469A JP S56169469 A JPS56169469 A JP S56169469A JP 7220280 A JP7220280 A JP 7220280A JP 7220280 A JP7220280 A JP 7220280A JP S56169469 A JPS56169469 A JP S56169469A
Authority
JP
Japan
Prior art keywords
digital
tone signal
audible tone
audio
generating circuit
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.)
Granted
Application number
JP7220280A
Other languages
English (en)
Other versions
JPS6226617B2 (ja
Inventor
Tatsuki Hayashi
Akira Miyasaka
Yutaka Moriyama
Shigeru Oe
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.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP7220280A priority Critical patent/JPS56169469A/ja
Publication of JPS56169469A publication Critical patent/JPS56169469A/ja
Publication of JPS6226617B2 publication Critical patent/JPS6226617B2/ja
Granted legal-status Critical Current

Links

Classifications

    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
JP7220280A 1980-05-30 1980-05-30 Signal tone processing system Granted JPS56169469A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7220280A JPS56169469A (en) 1980-05-30 1980-05-30 Signal tone processing system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7220280A JPS56169469A (en) 1980-05-30 1980-05-30 Signal tone processing system

Publications (2)

Publication Number Publication Date
JPS56169469A true JPS56169469A (en) 1981-12-26
JPS6226617B2 JPS6226617B2 (ja) 1987-06-10

Family

ID=13482404

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7220280A Granted JPS56169469A (en) 1980-05-30 1980-05-30 Signal tone processing system

Country Status (1)

Country Link
JP (1) JPS56169469A (ja)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5480003A (en) * 1977-12-09 1979-06-26 Hitachi Ltd Signal tone supply system in time-division telephone ex change system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5480003A (en) * 1977-12-09 1979-06-26 Hitachi Ltd Signal tone supply system in time-division telephone ex change system

Also Published As

Publication number Publication date
JPS6226617B2 (ja) 1987-06-10

Similar Documents

Publication Publication Date Title
JPS6182599A (ja) 電話機とデ−タバスを結合し両方向通信を可能にするための装置
JPS5477013A (en) Transmission system for picture sound
GB1329575A (en) Group communication apparatus
FR2412994A1 (fr) Dispositif pour utiliser une ligne d'abonne bifilaire en telephonie multiplex
JPS5541094A (en) Method of and device for converting aural signal to fdm and pcm to fdm or vice versa
JPS56169469A (en) Signal tone processing system
JPS55138955A (en) Time sharing channel interruption system
FR2345872A1 (fr) Installation pour la transmission simultanee par voie numerique de signaux visiophoniques et de signaux de donnees numeriques
JPS57135560A (en) Communication circuit monitoring system
JPS5283114A (en) Gathering receiver
JPS55109043A (en) Call piling system for optical data transmission
ES462009A1 (es) Sistema telefonico de partes comunicantes multiples.
JPS5558658A (en) Subscriber's line telephone transmission system
JPS5784699A (en) Main trunk incoming call display system for button telephone set
SU552731A1 (ru) Способ передачи стереофонических прогамм
JPS5567267A (en) Hand-free telephone set
JPS56149196A (en) Many-subscribers calling device
JPS54136107A (en) Digital telephone exchange system
JPS5673937A (en) Pcm communication system
JPS57143947A (en) Optical fiber picture transmitter
JPS57135600A (en) Listening device
JPS56101246A (en) Audio output device
SU1552407A1 (ru) Устройство служебно-диспетчерской св зи
JPS5696571A (en) Signal transmission system
JPS54109709A (en) Verification system