CA998788A - Ring trip circuit - Google Patents

Ring trip circuit

Info

Publication number
CA998788A
CA998788A CA171,387A CA171387A CA998788A CA 998788 A CA998788 A CA 998788A CA 171387 A CA171387 A CA 171387A CA 998788 A CA998788 A CA 998788A
Authority
CA
Canada
Prior art keywords
trip circuit
ring trip
ring
circuit
trip
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
CA171,387A
Other languages
English (en)
Other versions
CA171387S (en
Inventor
Robert G. Pesz
Robert T. Cleary
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.)
GTE Automatic Electric Laboratories Inc
Original Assignee
GTE Automatic Electric Laboratories Inc
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 GTE Automatic Electric Laboratories Inc filed Critical GTE Automatic Electric Laboratories Inc
Application granted granted Critical
Publication of CA998788A publication Critical patent/CA998788A/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
    • H04M19/026—Arrangements for interrupting the ringing current

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Devices For Supply Of Signal Current (AREA)
CA171,387A 1972-06-20 1973-05-15 Ring trip circuit Expired CA998788A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US26467372A 1972-06-20 1972-06-20

Publications (1)

Publication Number Publication Date
CA998788A true CA998788A (en) 1976-10-19

Family

ID=23007109

Family Applications (1)

Application Number Title Priority Date Filing Date
CA171,387A Expired CA998788A (en) 1972-06-20 1973-05-15 Ring trip circuit

Country Status (3)

Country Link
US (1) US3748401A (it)
CA (1) CA998788A (it)
IT (1) IT989272B (it)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4064373A (en) * 1973-07-09 1977-12-20 International Standard Electric Corporation Line circuit for key telephone systems
US3941939A (en) * 1974-11-25 1976-03-02 International Telephone And Telegraph Corporation Electronic ring trip circuit
CA1240085A (en) * 1984-05-30 1988-08-02 Kenji Takato Calling signal transmission apparatus
JPH05176354A (ja) * 1991-12-20 1993-07-13 Fujitsu Ltd 加入者インタフェース回路
US8717726B2 (en) * 2011-05-27 2014-05-06 Mersen Usa Newburyport-Ma, Llc Static surge protection device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3341665A (en) * 1964-03-23 1967-09-12 Lorain Prod Corp Interrupter circuit for telephone systems

Also Published As

Publication number Publication date
IT989272B (it) 1975-05-20
US3748401A (en) 1973-07-24

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