BE808097A - DEVICE FOR THE PRODUCTION OF SEQUENTIAL DIRECT CURRENT PULSES ON TELEPHONE LINES - Google Patents

DEVICE FOR THE PRODUCTION OF SEQUENTIAL DIRECT CURRENT PULSES ON TELEPHONE LINES

Info

Publication number
BE808097A
BE808097A BE138420A BE138420A BE808097A BE 808097 A BE808097 A BE 808097A BE 138420 A BE138420 A BE 138420A BE 138420 A BE138420 A BE 138420A BE 808097 A BE808097 A BE 808097A
Authority
BE
Belgium
Prior art keywords
production
direct current
current pulses
telephone lines
sequential direct
Prior art date
Application number
BE138420A
Other languages
French (fr)
Inventor
S Mietan
K J Noack
K Fenske
Original Assignee
Bosse Telefonbau G M B H
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 Bosse Telefonbau G M B H filed Critical Bosse Telefonbau G M B H
Publication of BE808097A publication Critical patent/BE808097A/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
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/08—Current supply arrangements for telephone systems with current supply sources at the substations

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephonic Communication Services (AREA)
BE138420A 1972-12-01 1973-11-30 DEVICE FOR THE PRODUCTION OF SEQUENTIAL DIRECT CURRENT PULSES ON TELEPHONE LINES BE808097A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722258839 DE2258839B2 (en) 1972-12-01 1972-12-01 Circuit arrangement for generating serial direct current pulses on communication lines

Publications (1)

Publication Number Publication Date
BE808097A true BE808097A (en) 1974-03-15

Family

ID=5863228

Family Applications (1)

Application Number Title Priority Date Filing Date
BE138420A BE808097A (en) 1972-12-01 1973-11-30 DEVICE FOR THE PRODUCTION OF SEQUENTIAL DIRECT CURRENT PULSES ON TELEPHONE LINES

Country Status (3)

Country Link
BE (1) BE808097A (en)
DE (1) DE2258839B2 (en)
IT (1) IT1006119B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2282198A1 (en) * 1974-08-12 1976-03-12 Trt Telecom Radio Electr Keyboard telephone for long lines - uses speech loop current to power MOS circuit
SE7608076L (en) * 1975-07-25 1977-01-26 Carlo Baldoni TEN NUMBER PROVIDED, DIGITAL NUMBER RECEIVER OF KEY TYPE

Also Published As

Publication number Publication date
DE2258839A1 (en) 1974-06-20
DE2258839B2 (en) 1974-12-12
IT1006119B (en) 1976-09-30

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