JPS5481007A - Signal tone delivery system - Google Patents

Signal tone delivery system

Info

Publication number
JPS5481007A
JPS5481007A JP14813677A JP14813677A JPS5481007A JP S5481007 A JPS5481007 A JP S5481007A JP 14813677 A JP14813677 A JP 14813677A JP 14813677 A JP14813677 A JP 14813677A JP S5481007 A JPS5481007 A JP S5481007A
Authority
JP
Japan
Prior art keywords
signal
signal tone
tone
input
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.)
Pending
Application number
JP14813677A
Other languages
English (en)
Inventor
Shiro Enami
Kiichi Shimizu
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.)
Hitachi Ltd
NTT Inc
Original Assignee
Hitachi Ltd
Nippon Telegraph and Telephone Corp
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 Hitachi Ltd, Nippon Telegraph and Telephone Corp filed Critical Hitachi Ltd
Priority to JP14813677A priority Critical patent/JPS5481007A/ja
Publication of JPS5481007A publication Critical patent/JPS5481007A/ja
Pending 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)
JP14813677A 1977-12-12 1977-12-12 Signal tone delivery system Pending JPS5481007A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14813677A JPS5481007A (en) 1977-12-12 1977-12-12 Signal tone delivery system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14813677A JPS5481007A (en) 1977-12-12 1977-12-12 Signal tone delivery system

Publications (1)

Publication Number Publication Date
JPS5481007A true JPS5481007A (en) 1979-06-28

Family

ID=15446064

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14813677A Pending JPS5481007A (en) 1977-12-12 1977-12-12 Signal tone delivery system

Country Status (1)

Country Link
JP (1) JPS5481007A (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02150858U (ja) * 1989-05-22 1990-12-27

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52130219A (en) * 1976-04-24 1977-11-01 Fujitsu Ltd Transmission control system for call signal

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52130219A (en) * 1976-04-24 1977-11-01 Fujitsu Ltd Transmission control system for call signal

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02150858U (ja) * 1989-05-22 1990-12-27

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