SE331496B - - Google Patents

Info

Publication number
SE331496B
SE331496B SE15002/68A SE1500268A SE331496B SE 331496 B SE331496 B SE 331496B SE 15002/68 A SE15002/68 A SE 15002/68A SE 1500268 A SE1500268 A SE 1500268A SE 331496 B SE331496 B SE 331496B
Authority
SE
Sweden
Prior art keywords
line
sub
signals
relay
relays
Prior art date
Application number
SE15002/68A
Other languages
English (en)
Inventor
N Edstroem
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
Priority to SE15002/68A priority Critical patent/SE331496B/xx
Priority to US865279A priority patent/US3636269A/en
Priority to NO4160/69A priority patent/NO125210B/no
Priority to DE1954057A priority patent/DE1954057C3/de
Priority to GB54083/69A priority patent/GB1281934A/en
Priority to FR6938119A priority patent/FR2022652A1/fr
Priority to NL6916697A priority patent/NL6916697A/xx
Priority to BE741286D priority patent/BE741286A/xx
Publication of SE331496B publication Critical patent/SE331496B/xx

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
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/0004—Selecting arrangements using crossbar selectors in the switching stages

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Telephonic Communication Services (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Devices For Supply Of Signal Current (AREA)
SE15002/68A 1968-11-05 1968-11-05 SE331496B (xx)

Priority Applications (8)

Application Number Priority Date Filing Date Title
SE15002/68A SE331496B (xx) 1968-11-05 1968-11-05
US865279A US3636269A (en) 1968-11-05 1969-10-10 Arrangement for voice-frequency signalling in telephone systems
NO4160/69A NO125210B (xx) 1968-11-05 1969-10-20
DE1954057A DE1954057C3 (de) 1968-11-05 1969-10-22 Schaltungsanordnung für Tonfrequenz-Tastwahl in Fernsprechvermittlungsanlagen
GB54083/69A GB1281934A (en) 1968-11-05 1969-11-04 Arangement for voice-frequency signalling, e.g. for a telephone system
FR6938119A FR2022652A1 (xx) 1968-11-05 1969-11-05
NL6916697A NL6916697A (xx) 1968-11-05 1969-11-05
BE741286D BE741286A (xx) 1968-11-05 1969-11-05

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE15002/68A SE331496B (xx) 1968-11-05 1968-11-05

Publications (1)

Publication Number Publication Date
SE331496B true SE331496B (xx) 1971-01-04

Family

ID=20299990

Family Applications (1)

Application Number Title Priority Date Filing Date
SE15002/68A SE331496B (xx) 1968-11-05 1968-11-05

Country Status (8)

Country Link
US (1) US3636269A (xx)
BE (1) BE741286A (xx)
DE (1) DE1954057C3 (xx)
FR (1) FR2022652A1 (xx)
GB (1) GB1281934A (xx)
NL (1) NL6916697A (xx)
NO (1) NO125210B (xx)
SE (1) SE331496B (xx)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2162898A1 (de) * 1971-06-22 1972-12-28 Sits Soc It Telecom Siemens Schaltungsanordnung zum Identifizieren von Gleichstromsignalen in einer Fernsprechanlage mit Tastenwahl
JPS5012913A (xx) * 1973-06-04 1975-02-10

Also Published As

Publication number Publication date
FR2022652A1 (xx) 1970-07-31
DE1954057C3 (de) 1975-06-26
DE1954057B2 (de) 1974-11-07
NO125210B (xx) 1972-07-31
NL6916697A (xx) 1970-05-08
GB1281934A (en) 1972-07-19
US3636269A (en) 1972-01-18
DE1954057A1 (de) 1970-06-18
BE741286A (xx) 1970-04-16

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