GB1552078A - Electronic ringing circuit - Google Patents

Electronic ringing circuit

Info

Publication number
GB1552078A
GB1552078A GB3908477A GB3908477A GB1552078A GB 1552078 A GB1552078 A GB 1552078A GB 3908477 A GB3908477 A GB 3908477A GB 3908477 A GB3908477 A GB 3908477A GB 1552078 A GB1552078 A GB 1552078A
Authority
GB
United Kingdom
Prior art keywords
ringing circuit
electronic ringing
electronic
circuit
ringing
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.)
Expired
Application number
GB3908477A
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric 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
Priority claimed from FR7629418A external-priority patent/FR2366756A1/en
Priority claimed from FR7704774A external-priority patent/FR2381425A2/en
Application filed by International Standard Electric Corp filed Critical International Standard Electric Corp
Publication of GB1552078A publication Critical patent/GB1552078A/en
Expired 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
GB3908477A 1976-09-30 1977-09-20 Electronic ringing circuit Expired GB1552078A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7629418A FR2366756A1 (en) 1976-09-30 1976-09-30 Ringing signal generator for telephone networks - uses triacs instead of mechanical relays between subscriber and supply lines
FR7704774A FR2381425A2 (en) 1977-02-18 1977-02-18 ELECTRONIC BELL INJECTION CIRCUIT

Publications (1)

Publication Number Publication Date
GB1552078A true GB1552078A (en) 1979-09-05

Family

ID=26219649

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3908477A Expired GB1552078A (en) 1976-09-30 1977-09-20 Electronic ringing circuit

Country Status (1)

Country Link
GB (1) GB1552078A (en)

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee
PCNP Patent ceased through non-payment of renewal fee