IT972579B - Perfezionamento nei trasmettito ri di impulsi elettrici - Google Patents

Perfezionamento nei trasmettito ri di impulsi elettrici

Info

Publication number
IT972579B
IT972579B IT33187/72A IT3318772A IT972579B IT 972579 B IT972579 B IT 972579B IT 33187/72 A IT33187/72 A IT 33187/72A IT 3318772 A IT3318772 A IT 3318772A IT 972579 B IT972579 B IT 972579B
Authority
IT
Italy
Prior art keywords
transmitters
improvement
electrical impulses
impulses
electrical
Prior art date
Application number
IT33187/72A
Other languages
English (en)
Italian (it)
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
Application granted granted Critical
Publication of IT972579B publication Critical patent/IT972579B/it

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)
  • Mobile Radio Communication Systems (AREA)
  • Selective Calling Equipment (AREA)
  • Exchange Systems With Centralized Control (AREA)
  • Electronic Switches (AREA)
IT33187/72A 1971-12-23 1972-12-20 Perfezionamento nei trasmettito ri di impulsi elettrici IT972579B (it)

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
IT972579B true IT972579B (it) 1974-05-31

Family

ID=10484670

Family Applications (1)

Application Number Title Priority Date Filing Date
IT33187/72A IT972579B (it) 1971-12-23 1972-12-20 Perfezionamento nei trasmettito ri di impulsi elettrici

Country Status (8)

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

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7907134A (nl) * 1979-09-25 1981-03-27 Ericsson Telefon Mij Telefooninstallatie van de als sterpuntinstallatie aangeduide soort.
FR2501938B1 (fr) * 1981-03-13 1985-06-21 Constr Telephoniques Circuit conformateur de signaux

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
FR2165649A5 (es) 1973-08-03
ES409985A1 (es) 1976-04-01
AU470553B2 (en) 1976-03-18
ZA728043B (en) 1973-07-25
DE2262505C2 (de) 1982-12-09
GB1369829A (en) 1974-10-09
AU4959672A (en) 1974-06-06
DE2262505A1 (de) 1973-06-28
IE37079B1 (en) 1977-04-27

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