FR2343377A1 - METHOD AND APPARATUS FOR TRANSFORMING MULTI-FREQUENCY SIGNALING SIGNALS - Google Patents

METHOD AND APPARATUS FOR TRANSFORMING MULTI-FREQUENCY SIGNALING SIGNALS

Info

Publication number
FR2343377A1
FR2343377A1 FR7706234A FR7706234A FR2343377A1 FR 2343377 A1 FR2343377 A1 FR 2343377A1 FR 7706234 A FR7706234 A FR 7706234A FR 7706234 A FR7706234 A FR 7706234A FR 2343377 A1 FR2343377 A1 FR 2343377A1
Authority
FR
France
Prior art keywords
frequency signaling
signaling signals
transforming multi
transforming
signals
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.)
Granted
Application number
FR7706234A
Other languages
French (fr)
Other versions
FR2343377B1 (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.)
Nortel Networks Ltd
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 FR2343377A1 publication Critical patent/FR2343377A1/en
Application granted granted Critical
Publication of FR2343377B1 publication Critical patent/FR2343377B1/fr
Granted 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
    • H04Q1/457—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)
FR7706234A 1976-03-03 1977-03-03 METHOD AND APPARATUS FOR TRANSFORMING MULTI-FREQUENCY SIGNALING SIGNALS Granted FR2343377A1 (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 (2)

Publication Number Publication Date
FR2343377A1 true FR2343377A1 (en) 1977-09-30
FR2343377B1 FR2343377B1 (en) 1983-08-12

Family

ID=4105372

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7706234A Granted FR2343377A1 (en) 1976-03-03 1977-03-03 METHOD AND APPARATUS FOR TRANSFORMING MULTI-FREQUENCY SIGNALING SIGNALS

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

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3795775A (en) * 1972-10-16 1974-03-05 Microsystems Int Ltd 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

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3710031A (en) * 1970-12-23 1973-01-09 Itt Multi frequency 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

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3795775A (en) * 1972-10-16 1974-03-05 Microsystems Int Ltd 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
CA1031086A (en) 1978-05-09
JPS52107708A (en) 1977-09-09
SE7702418L (en) 1977-09-04
AU508271B2 (en) 1980-03-13
GB1532103A (en) 1978-11-15
DK88877A (en) 1977-09-04
BE852056A (en) 1977-07-01
NL186057B (en) 1990-04-02
FR2343377B1 (en) 1983-08-12
NL186057C (en) 1990-09-03
NO770696L (en) 1977-09-06
AU2244877A (en) 1978-08-24
SE424129B (en) 1982-06-28
NL7702219A (en) 1977-09-06
DE2709370A1 (en) 1977-09-08

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Legal Events

Date Code Title Description
ST Notification of lapse