SE376139B - - Google Patents

Info

Publication number
SE376139B
SE376139B SE7108599A SE859971A SE376139B SE 376139 B SE376139 B SE 376139B SE 7108599 A SE7108599 A SE 7108599A SE 859971 A SE859971 A SE 859971A SE 376139 B SE376139 B SE 376139B
Authority
SE
Sweden
Application number
SE7108599A
Inventor
S Usuda
S Mitzusawa
H Tateno
Original Assignee
Nippon Telegraph & Telephone
Fujitsu 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 Nippon Telegraph & Telephone, Fujitsu Ltd filed Critical Nippon Telegraph & Telephone
Publication of SE376139B publication Critical patent/SE376139B/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
    • H04Q1/453—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling in which m-out-of-n signalling frequencies are transmitted

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Dc Digital Transmission (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Electronic Switches (AREA)
SE7108599A 1970-07-03 1971-07-02 SE376139B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP45057734A JPS5138484B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1970-07-03 1970-07-03

Publications (1)

Publication Number Publication Date
SE376139B true SE376139B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1975-05-05

Family

ID=13064134

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7108599A SE376139B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1970-07-03 1971-07-02

Country Status (6)

Country Link
US (1) US3701857A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS5138484B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
BE (1) BE769428A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE2130975C3 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1353199A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
SE (1) SE376139B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA976675A (en) * 1972-10-16 1975-10-21 Microsystems International Limited Dual tone receiver
US3875347A (en) * 1973-10-01 1975-04-01 Gte Automatic Electric Lab Inc Multifrequency signal receiver
US3930127A (en) * 1974-01-18 1975-12-30 Baldwin Electronics Inc Tone detector
JPS5543677B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1974-05-15 1980-11-07
JPS5242308A (en) * 1975-10-01 1977-04-01 Iwatsu Electric Co Ltd Multiplex frequency signal receiver
US4636590A (en) * 1984-12-31 1987-01-13 Computer Security Corporation Method and apparatus for converting frequency signals representing characters to binary code

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL267564A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1960-08-22
US3288940A (en) * 1963-10-24 1966-11-29 Automatic Elect Lab Multifrequency signal receiver
US3539731A (en) * 1968-11-05 1970-11-10 Bell Telephone Labor Inc Multifrequency signal receiver

Also Published As

Publication number Publication date
DE2130975B2 (de) 1979-03-01
JPS5138484B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1976-10-22
GB1353199A (en) 1974-05-15
US3701857A (en) 1972-10-31
DE2130975C3 (de) 1979-10-25
DE2130975A1 (de) 1972-01-05
BE769428A (fr) 1971-11-16

Similar Documents

Publication Publication Date Title
FR2119029B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JPS5138484B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AU3326071A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AU2044470A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AU2017870A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AU1716970A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AU1833270A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AU2085370A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AU2130570A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AU1881070A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AU1918570A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AU1591370A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AU1603270A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AU1689770A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AU1789870A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AU1832970A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AU1841070A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AU1872870A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AU1879170A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AU1969370A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AU1086670A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AU2144270A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AU2131570A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AU2130770A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AU1943370A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)