GB1542836A - Multifrequency signal receiver - Google Patents

Multifrequency signal receiver

Info

Publication number
GB1542836A
GB1542836A GB5070677A GB5070677A GB1542836A GB 1542836 A GB1542836 A GB 1542836A GB 5070677 A GB5070677 A GB 5070677A GB 5070677 A GB5070677 A GB 5070677A GB 1542836 A GB1542836 A GB 1542836A
Authority
GB
United Kingdom
Prior art keywords
signal receiver
multifrequency signal
multifrequency
receiver
signal
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
GB5070677A
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
International Standard Electric Corp
Original Assignee
International 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 International Standard Electric Corp filed Critical International Standard Electric Corp
Publication of GB1542836A publication Critical patent/GB1542836A/en
Expired legal-status Critical Current

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)
  • Circuits Of Receivers In General (AREA)
GB5070677A 1976-12-10 1977-12-06 Multifrequency signal receiver Expired GB1542836A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7637291A FR2373926A1 (fr) 1976-12-10 1976-12-10 Recepteur de signaux multifrequences

Publications (1)

Publication Number Publication Date
GB1542836A true GB1542836A (en) 1979-03-28

Family

ID=9180916

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5070677A Expired GB1542836A (en) 1976-12-10 1977-12-06 Multifrequency signal receiver

Country Status (2)

Country Link
FR (1) FR2373926A1 (enExample)
GB (1) GB1542836A (enExample)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3555435A (en) * 1968-11-21 1971-01-12 Robert E Vosteen Multifrequency signal detector
US3686576A (en) * 1970-12-18 1972-08-22 Ibm Parallel tone detector
NL7101521A (enExample) * 1971-02-05 1972-08-08
US3914557A (en) * 1973-04-11 1975-10-21 Bell Telephone Labor Inc Multifrequency tone detecting arrangement
FR2295665A1 (fr) * 1974-12-18 1976-07-16 Labo Cent Telecommunicat Recepteur numerique de signaux multifrequences

Also Published As

Publication number Publication date
FR2373926A1 (fr) 1978-07-07
FR2373926B1 (enExample) 1982-12-10

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Legal Events

Date Code Title Description
PS Patent sealed
746 Register noted 'licences of right' (sect. 46/1977)
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee