ZA728043B - Improvements in or relating to electric impulse transmitters - Google Patents

Improvements in or relating to electric impulse transmitters

Info

Publication number
ZA728043B
ZA728043B ZA728043A ZA728043A ZA728043B ZA 728043 B ZA728043 B ZA 728043B ZA 728043 A ZA728043 A ZA 728043A ZA 728043 A ZA728043 A ZA 728043A ZA 728043 B ZA728043 B ZA 728043B
Authority
ZA
South Africa
Prior art keywords
relating
electric impulse
impulse transmitters
transmitters
electric
Prior art date
Application number
ZA728043A
Inventor
M Debenham
Original Assignee
Standard Telephones Cables Ltd
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 Telephones Cables Ltd filed Critical Standard Telephones Cables Ltd
Publication of ZA728043B publication Critical patent/ZA728043B/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
    • 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
    • H04M1/515—Devices for calling a subscriber by generating or selecting signals other than trains of pulses of similar shape, or signals other than currents of one or more different frequencies, e.g. generation of dc signals of alternating polarity, coded pulses or impedance dialling

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Telephonic Communication Services (AREA)
  • Exchange Systems With Centralized Control (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Electronic Switches (AREA)
  • Selective Calling Equipment (AREA)
ZA728043A 1971-12-23 1971-12-23 Improvements in or relating to electric impulse transmitters ZA728043B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5992771A GB1369829A (en) 1971-12-23 1971-12-23 Electric impulse transmitters

Publications (1)

Publication Number Publication Date
ZA728043B true ZA728043B (en) 1973-07-25

Family

ID=10484670

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA728043A ZA728043B (en) 1971-12-23 1971-12-23 Improvements in or relating to electric impulse transmitters

Country Status (8)

Country Link
AU (1) AU470553B2 (en)
DE (1) DE2262505C2 (en)
ES (1) ES409985A1 (en)
FR (1) FR2165649A5 (en)
GB (1) GB1369829A (en)
IE (1) IE37079B1 (en)
IT (1) IT972579B (en)
ZA (1) ZA728043B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7907134A (en) * 1979-09-25 1981-03-27 Ericsson Telefon Mij TELEPHONE INSTALLATION OF THE TYPE INDICATED AS A STAR POINT INSTALLATION.
FR2501938B1 (en) * 1981-03-13 1985-06-21 Constr Telephoniques SIGNAL CONFORMER CIRCUIT

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1236961A (en) * 1968-01-12 1971-06-23 Gen Electric Co Ltd Improvements in or relating to electric impulse transmitters

Also Published As

Publication number Publication date
IE37079L (en) 1973-06-23
IT972579B (en) 1974-05-31
FR2165649A5 (en) 1973-08-03
AU470553B2 (en) 1976-03-18
AU4959672A (en) 1974-06-06
DE2262505C2 (en) 1982-12-09
DE2262505A1 (en) 1973-06-28
GB1369829A (en) 1974-10-09
ES409985A1 (en) 1976-04-01
IE37079B1 (en) 1977-04-27

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