JPS543408A - Telephone set with automatic adjusting function for ringing tone volume - Google Patents

Telephone set with automatic adjusting function for ringing tone volume

Info

Publication number
JPS543408A
JPS543408A JP6860377A JP6860377A JPS543408A JP S543408 A JPS543408 A JP S543408A JP 6860377 A JP6860377 A JP 6860377A JP 6860377 A JP6860377 A JP 6860377A JP S543408 A JPS543408 A JP S543408A
Authority
JP
Japan
Prior art keywords
ringing tone
tone volume
telephone set
adjusting function
automatic adjusting
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
JP6860377A
Other languages
Japanese (ja)
Inventor
Mamoru Maki
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP6860377A priority Critical patent/JPS543408A/en
Publication of JPS543408A publication Critical patent/JPS543408A/en
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
    • H04M19/04—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)

Abstract

PURPOSE:To secure an appropriate ringing tone volume to the user at all times, by rectifying the peripheral noise detected through the microphone to keep the noise at the level of before setection of the terminating signal through the Hall circuit and securing a constant relative level difference between the ringing tone volume and the peripheral noise.
JP6860377A 1977-06-09 1977-06-09 Telephone set with automatic adjusting function for ringing tone volume Pending JPS543408A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6860377A JPS543408A (en) 1977-06-09 1977-06-09 Telephone set with automatic adjusting function for ringing tone volume

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6860377A JPS543408A (en) 1977-06-09 1977-06-09 Telephone set with automatic adjusting function for ringing tone volume

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP5801085A Division JPS61179643A (en) 1985-03-22 1985-03-22 Telephone set with automatic adjusting function of ring tone volume

Publications (1)

Publication Number Publication Date
JPS543408A true JPS543408A (en) 1979-01-11

Family

ID=13378516

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6860377A Pending JPS543408A (en) 1977-06-09 1977-06-09 Telephone set with automatic adjusting function for ringing tone volume

Country Status (1)

Country Link
JP (1) JPS543408A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63258145A (en) * 1987-04-15 1988-10-25 Nec Corp Adjusting device for call tone volume

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63258145A (en) * 1987-04-15 1988-10-25 Nec Corp Adjusting device for call tone volume

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