JPS57112174A - System for generating digital audible tone - Google Patents

System for generating digital audible tone

Info

Publication number
JPS57112174A
JPS57112174A JP55187332A JP18733280A JPS57112174A JP S57112174 A JPS57112174 A JP S57112174A JP 55187332 A JP55187332 A JP 55187332A JP 18733280 A JP18733280 A JP 18733280A JP S57112174 A JPS57112174 A JP S57112174A
Authority
JP
Japan
Prior art keywords
changing
control data
rom7
circuit
digital audible
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
JP55187332A
Other languages
English (en)
Japanese (ja)
Other versions
JPH0123026B2 (enExample
Inventor
Masatoshi Kumagai
Yasunori Ogawa
Takashi Hatano
Yasutsugu Nagahama
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 JP55187332A priority Critical patent/JPS57112174A/ja
Publication of JPS57112174A publication Critical patent/JPS57112174A/ja
Publication of JPH0123026B2 publication Critical patent/JPH0123026B2/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
    • H04M19/023—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone by reversing the polarity of the current at the exchange

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
JP55187332A 1980-12-29 1980-12-29 System for generating digital audible tone Granted JPS57112174A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55187332A JPS57112174A (en) 1980-12-29 1980-12-29 System for generating digital audible tone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55187332A JPS57112174A (en) 1980-12-29 1980-12-29 System for generating digital audible tone

Publications (2)

Publication Number Publication Date
JPS57112174A true JPS57112174A (en) 1982-07-13
JPH0123026B2 JPH0123026B2 (enExample) 1989-04-28

Family

ID=16204140

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55187332A Granted JPS57112174A (en) 1980-12-29 1980-12-29 System for generating digital audible tone

Country Status (1)

Country Link
JP (1) JPS57112174A (enExample)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55115770A (en) * 1979-02-28 1980-09-05 Toshiba Corp Tone signal production system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55115770A (en) * 1979-02-28 1980-09-05 Toshiba Corp Tone signal production system

Also Published As

Publication number Publication date
JPH0123026B2 (enExample) 1989-04-28

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