ZA756365B - Circuit arrangement for telephone subset - Google Patents

Circuit arrangement for telephone subset

Info

Publication number
ZA756365B
ZA756365B ZA00756365A ZA756365A ZA756365B ZA 756365 B ZA756365 B ZA 756365B ZA 00756365 A ZA00756365 A ZA 00756365A ZA 756365 A ZA756365 A ZA 756365A ZA 756365 B ZA756365 B ZA 756365B
Authority
ZA
South Africa
Prior art keywords
circuit arrangement
telephone subset
subset
telephone
arrangement
Prior art date
Application number
ZA00756365A
Inventor
B Bidwell
J Ghalley
Original Assignee
Int 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 Int Standard Electric Corp filed Critical Int Standard Electric Corp
Publication of ZA756365B publication Critical patent/ZA756365B/en

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)
ZA00756365A 1974-10-11 1975-10-08 Circuit arrangement for telephone subset ZA756365B (en)

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 (1)

Publication Number Publication Date
ZA756365B true ZA756365B (en) 1976-09-29

Family

ID=10431564

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA00756365A ZA756365B (en) 1974-10-11 1975-10-08 Circuit arrangement for telephone subset

Country Status (5)

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

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2451690A1 (en) * 1979-03-16 1980-10-10 Horlogerie Photograph Fse Pushbutton telephone set - has power consumption reduced by controlling supply to integrated circuit incorporating call number memory
FR2505586A1 (en) * 1981-05-05 1982-11-12 Thomson Csf Mat Tel Keyboard telephone receiver with stabilised power supply - contains transistors in series with supply to control open and short circuit condition of line during dialling
FR2508744A1 (en) * 1981-06-26 1982-12-31 Thomson Csf Mat Tel Pushbutton telephone with remote supply sound amplifier - has power supply in series with microphone and earphone terminal through control circuit and uses regulator for amplifier

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1394148A (en) * 1972-09-11 1975-05-14 Int Standard Electric Corp Push-button telphone subset

Also Published As

Publication number Publication date
FR2287813B1 (en) 1979-01-05
IE41749B1 (en) 1980-03-12
HK39579A (en) 1979-06-29
FR2287813A1 (en) 1976-05-07
IE41749L (en) 1976-04-11
GB1521468A (en) 1978-08-16

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