FR2275948A1 - Appareils de telephone a sonneries interchangeables - Google Patents

Appareils de telephone a sonneries interchangeables

Info

Publication number
FR2275948A1
FR2275948A1 FR7516846A FR7516846A FR2275948A1 FR 2275948 A1 FR2275948 A1 FR 2275948A1 FR 7516846 A FR7516846 A FR 7516846A FR 7516846 A FR7516846 A FR 7516846A FR 2275948 A1 FR2275948 A1 FR 2275948A1
Authority
FR
France
Prior art keywords
telephone
interchangeable
ringing tone
base
sound generator
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
FR7516846A
Other languages
English (en)
French (fr)
Other versions
FR2275948B1 (https=
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.)
Tamura Electric Works Ltd
Original Assignee
Tamura Electric Works 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
Priority claimed from JP6239474U external-priority patent/JPS5324167Y2/ja
Priority claimed from JP7373074U external-priority patent/JPS512114U/ja
Priority claimed from JP7421174U external-priority patent/JPS514205U/ja
Application filed by Tamura Electric Works Ltd filed Critical Tamura Electric Works Ltd
Publication of FR2275948A1 publication Critical patent/FR2275948A1/fr
Application granted granted Critical
Publication of FR2275948B1 publication Critical patent/FR2275948B1/fr
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
    • H04M19/04—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)
  • Devices For Supply Of Signal Current (AREA)
FR7516846A 1974-05-30 1975-05-29 Appareils de telephone a sonneries interchangeables Granted FR2275948A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP6239474U JPS5324167Y2 (https=) 1974-05-30 1974-05-30
JP7373074U JPS512114U (https=) 1974-06-22 1974-06-22
JP7421174U JPS514205U (https=) 1974-06-26 1974-06-26

Publications (2)

Publication Number Publication Date
FR2275948A1 true FR2275948A1 (fr) 1976-01-16
FR2275948B1 FR2275948B1 (https=) 1977-04-15

Family

ID=34799151

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7516846A Granted FR2275948A1 (fr) 1974-05-30 1975-05-29 Appareils de telephone a sonneries interchangeables

Country Status (1)

Country Link
FR (1) FR2275948A1 (https=)

Also Published As

Publication number Publication date
FR2275948B1 (https=) 1977-04-15

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Legal Events

Date Code Title Description
ST Notification of lapse