DE3462367D1 - Tone source for telephone systems - Google Patents

Tone source for telephone systems

Info

Publication number
DE3462367D1
DE3462367D1 DE8484302298T DE3462367T DE3462367D1 DE 3462367 D1 DE3462367 D1 DE 3462367D1 DE 8484302298 T DE8484302298 T DE 8484302298T DE 3462367 T DE3462367 T DE 3462367T DE 3462367 D1 DE3462367 D1 DE 3462367D1
Authority
DE
Germany
Prior art keywords
tone
rom
stored
address
sequence
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
DE8484302298T
Other languages
English (en)
Inventor
Ernst August Munter
Andreas Laszlo Aczel
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
Application granted granted Critical
Publication of DE3462367D1 publication Critical patent/DE3462367D1/de
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
    • H04Q1/457—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
    • H04Q1/4575—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 which are transmitted in digital form

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Telephone Function (AREA)
  • Telephonic Communication Services (AREA)
  • Exchange Systems With Centralized Control (AREA)
DE8484302298T 1983-05-04 1984-04-04 Tone source for telephone systems Expired DE3462367D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA000427409A CA1185023A (en) 1983-05-04 1983-05-04 Tone source for telephone systems

Publications (1)

Publication Number Publication Date
DE3462367D1 true DE3462367D1 (en) 1987-03-12

Family

ID=4125166

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8484302298T Expired DE3462367D1 (en) 1983-05-04 1984-04-04 Tone source for telephone systems

Country Status (5)

Country Link
EP (1) EP0125012B1 (de)
JP (1) JPH0697776B2 (de)
AT (1) ATE25454T1 (de)
CA (1) CA1185023A (de)
DE (1) DE3462367D1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3730233A1 (de) * 1987-09-09 1989-03-23 Telefonbau & Normalzeit Gmbh Hoerton- und sprachansagegenerator fuer digitale fernmelde-, insbesondere fernsprechvermittlungsanlagen
CA2068154C (en) * 1992-05-07 1997-01-14 Janice C. Halligan Programmable call progress tones for a switching system
GB2353442B (en) 1999-06-15 2003-08-27 Nec Corp Ringing tone control method and device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4205203A (en) * 1978-08-08 1980-05-27 Wescom Switching, Inc. Methods and apparatus for digitally signaling sounds and tones in a PCM multiplex system
DE2855151A1 (de) * 1978-12-20 1980-07-10 Siemens Ag Digitaler hoertongenerator
DE3116576A1 (de) * 1981-04-27 1982-11-18 Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt Verfahren zum betreiben eines digitalen hoertongenerators

Also Published As

Publication number Publication date
CA1185023A (en) 1985-04-02
JPH0697776B2 (ja) 1994-11-30
EP0125012A1 (de) 1984-11-14
ATE25454T1 (de) 1987-02-15
EP0125012B1 (de) 1987-02-04
JPS59208975A (ja) 1984-11-27

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee