DK88877A - METHOD AND APPARATUS FOR TRANSFER OF MULTIFREQUENCY SIGNALING - Google Patents

METHOD AND APPARATUS FOR TRANSFER OF MULTIFREQUENCY SIGNALING

Info

Publication number
DK88877A
DK88877A DK88877A DK88877A DK88877A DK 88877 A DK88877 A DK 88877A DK 88877 A DK88877 A DK 88877A DK 88877 A DK88877 A DK 88877A DK 88877 A DK88877 A DK 88877A
Authority
DK
Denmark
Prior art keywords
transfer
multifrequency signaling
multifrequency
signaling
Prior art date
Application number
DK88877A
Other languages
Danish (da)
Inventor
D E Rittenhouse
Original Assignee
Northern Telecom 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 Northern Telecom Ltd filed Critical Northern Telecom Ltd
Publication of DK88877A publication Critical patent/DK88877A/en

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
    • H04Q1/457—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling with conversion of multifrequency signals into digital signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Stereo-Broadcasting Methods (AREA)
DK88877A 1976-03-03 1977-03-01 METHOD AND APPARATUS FOR TRANSFER OF MULTIFREQUENCY SIGNALING DK88877A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA247,035A CA1031086A (en) 1976-03-03 1976-03-03 Method and apparatus for translating multiple frequency signalling

Publications (1)

Publication Number Publication Date
DK88877A true DK88877A (en) 1977-09-04

Family

ID=4105372

Family Applications (1)

Application Number Title Priority Date Filing Date
DK88877A DK88877A (en) 1976-03-03 1977-03-01 METHOD AND APPARATUS FOR TRANSFER OF MULTIFREQUENCY SIGNALING

Country Status (11)

Country Link
JP (1) JPS52107708A (en)
AU (1) AU508271B2 (en)
BE (1) BE852056A (en)
CA (1) CA1031086A (en)
DE (1) DE2709370A1 (en)
DK (1) DK88877A (en)
FR (1) FR2343377A1 (en)
GB (1) GB1532103A (en)
NL (1) NL186057C (en)
NO (1) NO770696L (en)
SE (1) SE424129B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5831140B2 (en) * 1978-11-10 1983-07-04 株式会社日立製作所 signal receiver
DE3629907A1 (en) * 1986-09-03 1988-03-10 Standard Elektrik Lorenz Ag SIGNALING RECEIVER

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3743945A (en) * 1970-12-23 1973-07-03 Itt Limiter for multi frequency voice receiver
FR2127450A5 (en) * 1971-03-03 1972-10-13 Ibm France
BR7101977D0 (en) * 1971-04-05 1973-06-14 Ibm CIRCUIT PROCESSES AND PROVISIONS FOR DIGITAL DECODING OF ENCODED FREQUENCY SIGNS
CA976675A (en) * 1972-10-16 1975-10-21 Microsystems International Limited Dual tone receiver
US3914557A (en) * 1973-04-11 1975-10-21 Bell Telephone Labor Inc Multifrequency tone detecting arrangement
US3936801A (en) * 1974-09-12 1976-02-03 Bell Telephone Laboratories, Incorporated Multifrequency signal receiver timing circuit

Also Published As

Publication number Publication date
FR2343377B1 (en) 1983-08-12
NO770696L (en) 1977-09-06
AU2244877A (en) 1978-08-24
GB1532103A (en) 1978-11-15
AU508271B2 (en) 1980-03-13
CA1031086A (en) 1978-05-09
SE424129B (en) 1982-06-28
NL7702219A (en) 1977-09-06
NL186057C (en) 1990-09-03
NL186057B (en) 1990-04-02
DE2709370A1 (en) 1977-09-08
JPS52107708A (en) 1977-09-09
SE7702418L (en) 1977-09-04
BE852056A (en) 1977-07-01
FR2343377A1 (en) 1977-09-30

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Legal Events

Date Code Title Description
ATS Application withdrawn