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 (enExample
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 (enExample) 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 (enExample)
GB (1) GB1521468A (enExample)
HK (1) HK39579A (enExample)
IE (1) IE41749B1 (enExample)
ZA (1) ZA756365B (enExample)

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 (enExample) * 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 (enExample) * 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
GB1521468A (en) 1978-08-16
HK39579A (en) 1979-06-29
FR2287813B1 (enExample) 1979-01-05
ZA756365B (en) 1976-09-29
IE41749B1 (en) 1980-03-12

Similar Documents

Publication Publication Date Title
BE819400A (fr) Disjoncteur de ligne pour circuit de telecommunications
FR2280261A1 (fr) Dispositif de telecommunication telephonique
ES465791A1 (es) Perfeccionamientos en circuitos de suministro de corriente constante para lineas de abonados de telefono.
ES465797A1 (es) Perfeccionamientos en circuitos de interfase de lineas tele-fonicas.
BE809113A (fr) Clavier de selection electronique pour des appareils de telephone avec emission d'impulsions decadiques de telephone avec emission d'impulsions decadiques interchangeable avec le cadran d'appel
FR2315811A1 (fr) Dipole electronique pour le bouclage d'une ligne telephonique
FR2287813A1 (fr) Circuit pour poste telephonique a clavier et signalisation par rupture de boucle
SE7500362L (sv) Elektronisk nummerpulsgivare for telefonapparat.
JPS5269510A (en) Telephone ringing generator
FR2289077A1 (fr) Circuit d'envoi d'indicatifs preenregistres pour poste telephonique
BE865473Q (fr) Dispositif de signalisation pour systemes de telecommunication
BE831694A (fr) Circuit de ligne pour interconnecter un appareil telephonique et un appareil de commutation
CH607838A5 (en) Device for informing a calling telephone subscriber of the location of a subscriber to be called
BE858935A (fr) Unite de signalisation pour central telephonique
JPS52133710A (en) Device for operating switch of telephone set
JPS522206A (en) Indicator for termination of a telephone call
JPS5210007A (en) Delayed operation circuit for telephone call signal
FR2297526A1 (fr) Circuit d'appel telephonique a frequences multiples
BE788732A (fr) Poste telephonique a clavier
BE818661A (fr) Touches et clavier pour des installations de telecommunication
JPS5275911A (en) Circuit for generating outgoing and incoming switching signal
FR2298241A1 (fr) Dispositif de signalisation pour poste telephonique
IT1054798B (it) Trasmettitore a registro digitale e circuito di linea per commutazione telefonica
BE828071A (fr) Sonnerie telephonique
JPS5277609A (en) Remote control circuit of automatic answering telephone set

Legal Events

Date Code Title Description
ST Notification of lapse