FR2287813A1 - Circuit pour poste telephonique a clavier et signalisation par rupture de boucle - Google Patents

Circuit pour poste telephonique a clavier et signalisation par rupture de boucle

Info

Publication number
FR2287813A1
FR2287813A1 FR7531058A FR7531058A FR2287813A1 FR 2287813 A1 FR2287813 A1 FR 2287813A1 FR 7531058 A FR7531058 A FR 7531058A FR 7531058 A FR7531058 A FR 7531058A FR 2287813 A1 FR2287813 A1 FR 2287813A1
Authority
FR
France
Prior art keywords
keypad
signaling
break
loop
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.)
Granted
Application number
FR7531058A
Other languages
English (en)
French (fr)
Other versions
FR2287813B1 (https=
Inventor
Brian Alfred Bidwell
Jitmangat Singh Ghalley
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
Application filed by International Standard Electric Corp filed Critical International Standard Electric Corp
Publication of FR2287813A1 publication Critical patent/FR2287813A1/fr
Application granted granted Critical
Publication of FR2287813B1 publication Critical patent/FR2287813B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/26—Devices for calling a subscriber
    • H04M1/30—Devices which can set up and transmit only one digit at a time
    • H04M1/31—Devices which can set up and transmit only one digit at a time by interrupting current to generate trains of pulses; by periodically opening and closing contacts to generate trains of pulses
    • H04M1/312—Devices which can set up and transmit only one digit at a time by interrupting current to generate trains of pulses; by periodically opening and closing contacts to generate trains of pulses pulses produced by electronic circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Interface Circuits In Exchanges (AREA)
FR7531058A 1974-10-11 1975-10-10 Circuit pour poste telephonique a clavier et signalisation par rupture de boucle Granted FR2287813A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB44059/74A GB1521468A (en) 1974-10-11 1974-10-11 Circuit arrangement for telephone subset

Publications (2)

Publication Number Publication Date
FR2287813A1 true FR2287813A1 (fr) 1976-05-07
FR2287813B1 FR2287813B1 (https=) 1979-01-05

Family

ID=10431564

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7531058A Granted FR2287813A1 (fr) 1974-10-11 1975-10-10 Circuit pour poste telephonique a clavier et signalisation par rupture de boucle

Country Status (5)

Country Link
FR (1) FR2287813A1 (https=)
GB (1) GB1521468A (https=)
HK (1) HK39579A (https=)
IE (1) IE41749B1 (https=)
ZA (1) ZA756365B (https=)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2451690A1 (fr) * 1979-03-16 1980-10-10 Horlogerie Photograph Fse Perfectionnements aux circuits de postes telephoniques a clavier
FR2505586A1 (fr) * 1981-05-05 1982-11-12 Thomson Csf Mat Tel Poste telephonique a clavier
FR2508744A1 (fr) * 1981-06-26 1982-12-31 Thomson Csf Mat Tel Poste telephonique a clavier et a ecoute amplifiee

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2199236A1 (https=) * 1972-09-11 1974-04-05 Int Standard Electric Corp

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2199236A1 (https=) * 1972-09-11 1974-04-05 Int Standard Electric Corp

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2451690A1 (fr) * 1979-03-16 1980-10-10 Horlogerie Photograph Fse Perfectionnements aux circuits de postes telephoniques a clavier
FR2505586A1 (fr) * 1981-05-05 1982-11-12 Thomson Csf Mat Tel Poste telephonique a clavier
FR2508744A1 (fr) * 1981-06-26 1982-12-31 Thomson Csf Mat Tel Poste telephonique a clavier et a ecoute amplifiee

Also Published As

Publication number Publication date
IE41749L (en) 1976-04-11
FR2287813B1 (https=) 1979-01-05
HK39579A (en) 1979-06-29
IE41749B1 (en) 1980-03-12
GB1521468A (en) 1978-08-16
ZA756365B (en) 1976-09-29

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Legal Events

Date Code Title Description
ST Notification of lapse