FI56293C - Stroemmatningskrets till oscillator foer telefonapparater - Google Patents

Stroemmatningskrets till oscillator foer telefonapparater

Info

Publication number
FI56293C
FI56293C FI511/74A FI51174A FI56293C FI 56293 C FI56293 C FI 56293C FI 511/74 A FI511/74 A FI 511/74A FI 51174 A FI51174 A FI 51174A FI 56293 C FI56293 C FI 56293C
Authority
FI
Finland
Prior art keywords
telefonapparater
stroemmatningskrets
foer
till
oscillator
Prior art date
Application number
FI511/74A
Other languages
English (en)
Other versions
FI56293B (fi
Inventor
Kjell-Arne Persson
Original Assignee
Ericsson Telefon Ab L M
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 Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Application granted granted Critical
Publication of FI56293B publication Critical patent/FI56293B/fi
Publication of FI56293C publication Critical patent/FI56293C/fi

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
    • H04M1/50—Devices which can set up and transmit only one digit at a time by generating or selecting currents of predetermined frequencies or combinations of frequencies
    • 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)
  • Devices For Supply Of Signal Current (AREA)
  • Interface Circuits In Exchanges (AREA)
FI511/74A 1973-03-05 1974-02-21 Stroemmatningskrets till oscillator foer telefonapparater FI56293C (fi)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7303043A SE363948B (fi) 1973-03-05 1973-03-05

Publications (2)

Publication Number Publication Date
FI56293B FI56293B (fi) 1979-08-31
FI56293C true FI56293C (fi) 1979-12-10

Family

ID=20316803

Family Applications (1)

Application Number Title Priority Date Filing Date
FI511/74A FI56293C (fi) 1973-03-05 1974-02-21 Stroemmatningskrets till oscillator foer telefonapparater

Country Status (11)

Country Link
US (1) US3916114A (fi)
CA (1) CA993581A (fi)
CH (1) CH581931A5 (fi)
DK (1) DK138146B (fi)
FI (1) FI56293C (fi)
FR (1) FR2220941B1 (fi)
GB (1) GB1447726A (fi)
IT (1) IT1007412B (fi)
NL (1) NL7402380A (fi)
NO (1) NO132411C (fi)
SE (1) SE363948B (fi)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4323792A (en) * 1978-06-28 1982-04-06 Bergmann Guenther Two terminal circuitry for voltage limitation
JPS601790B2 (ja) * 1979-09-14 1985-01-17 岩崎通信機株式会社 押し釦ダイヤル回路
US4286120A (en) * 1979-10-15 1981-08-25 Gte Automatic Electric Labs Inc. Current regulated pulse dialer circuit
US4536614A (en) * 1982-12-13 1985-08-20 Gte Communication Systems Corporation Supervision and dial pulse detection circuit for a telephone subscriber line

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3035122A (en) * 1958-09-30 1962-05-15 Gen Dynamics Corp Constant current line circuitt for loop telephone lines
FR2087469A5 (fi) * 1970-05-20 1971-12-31 Ericsson Telefon Ab L M
CA930488A (en) * 1971-08-27 1973-07-17 C. J. Cowpland Michael Power supply

Also Published As

Publication number Publication date
CA993581A (en) 1976-07-20
SE363948B (fi) 1974-02-04
DE2408688B2 (de) 1976-09-23
US3916114A (en) 1975-10-28
GB1447726A (en) 1976-08-25
AU6618074A (en) 1975-09-04
FR2220941B1 (fi) 1977-09-23
DE2408688A1 (de) 1974-09-26
IT1007412B (it) 1976-10-30
NO132411C (fi) 1975-11-05
CH581931A5 (fi) 1976-11-15
FR2220941A1 (fi) 1974-10-04
DK138146B (da) 1978-07-17
NL7402380A (fi) 1974-09-09
FI56293B (fi) 1979-08-31
NO132411B (fi) 1975-07-28
DK138146C (fi) 1978-12-18

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