GB1521468A - Circuit arrangement for telephone subset - Google Patents

Circuit arrangement for telephone subset

Info

Publication number
GB1521468A
GB1521468A GB44059/74A GB4405974A GB1521468A GB 1521468 A GB1521468 A GB 1521468A GB 44059/74 A GB44059/74 A GB 44059/74A GB 4405974 A GB4405974 A GB 4405974A GB 1521468 A GB1521468 A GB 1521468A
Authority
GB
United Kingdom
Prior art keywords
outpulsing
circuit
arrangement
oct
relay
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
GB44059/74A
Other languages
English (en)
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB44059/74A priority Critical patent/GB1521468A/en
Priority to IE2205/75A priority patent/IE41749B1/en
Priority to ZA00756365A priority patent/ZA756365B/xx
Priority to FR7531058A priority patent/FR2287813A1/fr
Publication of GB1521468A publication Critical patent/GB1521468A/en
Priority to HK395/79A priority patent/HK39579A/xx
Expired 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)
GB44059/74A 1974-10-11 1974-10-11 Circuit arrangement for telephone subset Expired GB1521468A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
GB44059/74A GB1521468A (en) 1974-10-11 1974-10-11 Circuit arrangement for telephone subset
IE2205/75A IE41749B1 (en) 1974-10-11 1975-10-08 Circuit arrangement for tellephone subset
ZA00756365A ZA756365B (en) 1974-10-11 1975-10-08 Circuit arrangement for telephone subset
FR7531058A FR2287813A1 (fr) 1974-10-11 1975-10-10 Circuit pour poste telephonique a clavier et signalisation par rupture de boucle
HK395/79A HK39579A (en) 1974-10-11 1979-06-21 Circuit arrangement for telephone subset

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
GB1521468A true GB1521468A (en) 1978-08-16

Family

ID=10431564

Family Applications (1)

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

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)

Families Citing this family (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

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
FR2287813A1 (fr) 1976-05-07
IE41749L (en) 1976-04-11
HK39579A (en) 1979-06-29
FR2287813B1 (enExample) 1979-01-05
ZA756365B (en) 1976-09-29
IE41749B1 (en) 1980-03-12

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years

Effective date: 19951006