ES388415A1 - Mejoras en los circuitos de transmision de tono. - Google Patents

Mejoras en los circuitos de transmision de tono.

Info

Publication number
ES388415A1
ES388415A1 ES388415A ES388415A ES388415A1 ES 388415 A1 ES388415 A1 ES 388415A1 ES 388415 A ES388415 A ES 388415A ES 388415 A ES388415 A ES 388415A ES 388415 A1 ES388415 A1 ES 388415A1
Authority
ES
Spain
Prior art keywords
potential
pulse generator
output
diodes
frequency
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
ES388415A
Other languages
English (en)
Spanish (es)
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.)
Nokia Spain SA
Original Assignee
Alcatel Espana SA
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 Alcatel Espana SA filed Critical Alcatel Espana SA
Publication of ES388415A1 publication Critical patent/ES388415A1/es
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Telephone Function (AREA)
  • Telephonic Communication Services (AREA)
ES388415A 1970-02-18 1971-02-18 Mejoras en los circuitos de transmision de tono. Expired ES388415A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7005744A FR2079947A5 (oth) 1970-02-18 1970-02-18

Publications (1)

Publication Number Publication Date
ES388415A1 true ES388415A1 (es) 1973-05-01

Family

ID=9050845

Family Applications (1)

Application Number Title Priority Date Filing Date
ES388415A Expired ES388415A1 (es) 1970-02-18 1971-02-18 Mejoras en los circuitos de transmision de tono.

Country Status (3)

Country Link
DE (1) DE2107143A1 (oth)
ES (1) ES388415A1 (oth)
FR (1) FR2079947A5 (oth)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2286566A1 (fr) * 1974-09-24 1976-04-23 Constr Telephoniques Systeme de distribution de tonalites applicable dans un central telephonique
DE3712573C1 (de) * 1987-04-14 1988-08-11 Telefonbau & Normalzeit Gmbh Schaltungsanordnung fuer die Rufstromanschaltung in Fernmelde-,insbesondere Fernsprechvermittlungsanlagen

Also Published As

Publication number Publication date
DE2107143A1 (de) 1971-09-30
FR2079947A5 (oth) 1971-11-12

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Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 19880227