AU4603872A - Telephone circuits - Google Patents

Telephone circuits

Info

Publication number
AU4603872A
AU4603872A AU46038/72A AU4603872A AU4603872A AU 4603872 A AU4603872 A AU 4603872A AU 46038/72 A AU46038/72 A AU 46038/72A AU 4603872 A AU4603872 A AU 4603872A AU 4603872 A AU4603872 A AU 4603872A
Authority
AU
Australia
Prior art keywords
telephone circuits
telephone
circuits
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
AU46038/72A
Other languages
English (en)
Inventor
Anthony Newton Lawson
Edward Albert Feuell
Roger Maurice Hochreutiner
Robert Mervin Marcus
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.)
Nokia Services Ltd
STC PLC
Original Assignee
Standard Telephone and Cables Pty Ltd
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 Pty Ltd, Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables Pty Ltd
Publication of AU4603872A publication Critical patent/AU4603872A/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
    • H04M19/08—Current supply arrangements for telephone systems with current supply sources at the substations
    • 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)
  • Relay Circuits (AREA)
  • Interface Circuits In Exchanges (AREA)
AU46038/72A 1971-09-13 1972-08-28 Telephone circuits Expired AU4603872A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4255071 1971-09-13

Publications (1)

Publication Number Publication Date
AU4603872A true AU4603872A (en) 1974-03-07

Family

ID=10424913

Family Applications (1)

Application Number Title Priority Date Filing Date
AU46038/72A Expired AU4603872A (en) 1971-09-13 1972-08-28 Telephone circuits

Country Status (10)

Country Link
AR (1) AR193433A1 (enrdf_load_stackoverflow)
AT (1) AT336691B (enrdf_load_stackoverflow)
AU (1) AU4603872A (enrdf_load_stackoverflow)
BE (1) BE788732A (enrdf_load_stackoverflow)
CH (1) CH556623A (enrdf_load_stackoverflow)
DE (1) DE2243994A1 (enrdf_load_stackoverflow)
FR (1) FR2153982A5 (enrdf_load_stackoverflow)
GB (1) GB1318858A (enrdf_load_stackoverflow)
IT (1) IT967355B (enrdf_load_stackoverflow)
ZA (1) ZA724726B (enrdf_load_stackoverflow)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2238225A1 (de) * 1972-08-03 1974-02-14 Itt Ind Gmbh Deutsche Betriebsschaltung eines telefonapparates
GB1394148A (en) * 1972-09-11 1975-05-14 Int Standard Electric Corp Push-button telphone subset
DE3340396C2 (de) * 1983-11-09 1987-05-07 Hagenuk GmbH, 2300 Kiel Schaltungsanordnung für einen Rufsignalgenerator

Also Published As

Publication number Publication date
BE788732A (fr) 1973-03-13
ZA724726B (en) 1973-03-28
AR193433A1 (es) 1973-04-23
DE2243994A1 (de) 1973-03-22
AT336691B (de) 1977-05-25
CH556623A (de) 1974-11-29
IT967355B (it) 1974-02-28
ATA776172A (de) 1976-09-15
GB1318858A (en) 1973-05-31
FR2153982A5 (enrdf_load_stackoverflow) 1973-05-04

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