CA963593A - Digital decoder for multiple frequency telephone signalling - Google Patents

Digital decoder for multiple frequency telephone signalling

Info

Publication number
CA963593A
CA963593A CA154,852A CA154852A CA963593A CA 963593 A CA963593 A CA 963593A CA 154852 A CA154852 A CA 154852A CA 963593 A CA963593 A CA 963593A
Authority
CA
Canada
Prior art keywords
multiple frequency
digital decoder
frequency telephone
telephone signalling
signalling
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
CA154,852A
Other versions
CA154852S (en
Inventor
Knut R. Schartmann
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 Electric Co 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 Electric Co Ltd filed Critical Northern Electric Co Ltd
Priority to CA154,852A priority Critical patent/CA963593A/en
Application granted granted Critical
Publication of CA963593A publication Critical patent/CA963593A/en
Expired legal-status Critical Current

Links

CA154,852A 1972-10-25 1972-10-25 Digital decoder for multiple frequency telephone signalling Expired CA963593A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA154,852A CA963593A (en) 1972-10-25 1972-10-25 Digital decoder for multiple frequency telephone signalling

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA154,852A CA963593A (en) 1972-10-25 1972-10-25 Digital decoder for multiple frequency telephone signalling

Publications (1)

Publication Number Publication Date
CA963593A true CA963593A (en) 1975-02-25

Family

ID=4094800

Family Applications (1)

Application Number Title Priority Date Filing Date
CA154,852A Expired CA963593A (en) 1972-10-25 1972-10-25 Digital decoder for multiple frequency telephone signalling

Country Status (1)

Country Link
CA (1) CA963593A (en)

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