BE789970A - Dispositif electronique de modulation de courant, notamment de tonalitede faux-appels - Google Patents

Dispositif electronique de modulation de courant, notamment de tonalitede faux-appels

Info

Publication number
BE789970A
BE789970A BE789970DA BE789970A BE 789970 A BE789970 A BE 789970A BE 789970D A BE789970D A BE 789970DA BE 789970 A BE789970 A BE 789970A
Authority
BE
Belgium
Prior art keywords
modulation device
current modulation
electronic current
false call
call tones
Prior art date
Application number
Other languages
English (en)
French (fr)
Original Assignee
Cit Alcatel
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.)
Publication date
Publication of BE789970A publication Critical patent/BE789970A/xx

Links

Classifications

    • 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)
  • Telephonic Communication Services (AREA)
  • Devices For Supply Of Signal Current (AREA)
BE789970D 1971-10-20 Dispositif electronique de modulation de courant, notamment de tonalitede faux-appels BE789970A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7137681A FR2157159A5 (enrdf_load_stackoverflow) 1971-10-20 1971-10-20

Publications (1)

Publication Number Publication Date
BE789970A true BE789970A (fr) 1973-04-12

Family

ID=9084647

Family Applications (1)

Application Number Title Priority Date Filing Date
BE789970D BE789970A (fr) 1971-10-20 Dispositif electronique de modulation de courant, notamment de tonalitede faux-appels

Country Status (8)

Country Link
BE (1) BE789970A (enrdf_load_stackoverflow)
CH (1) CH565488A5 (enrdf_load_stackoverflow)
DE (1) DE2250647A1 (enrdf_load_stackoverflow)
FR (1) FR2157159A5 (enrdf_load_stackoverflow)
GB (1) GB1413312A (enrdf_load_stackoverflow)
IT (1) IT969631B (enrdf_load_stackoverflow)
NL (1) NL7214189A (enrdf_load_stackoverflow)
SE (1) SE389251B (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
FR2157159A5 (enrdf_load_stackoverflow) 1973-06-01
IT969631B (it) 1974-04-10
SE389251B (sv) 1976-10-25
DE2250647A1 (de) 1973-04-26
CH565488A5 (enrdf_load_stackoverflow) 1975-08-15
GB1413312A (en) 1975-11-12
NL7214189A (enrdf_load_stackoverflow) 1973-04-25

Similar Documents

Publication Publication Date Title
BE813766A (fr) Telephone commercial electronique
CH617817B (fr) Circuit elevateur de tension.
NL7603838A (nl) Bevestigingsinrichting.
NL7606468A (nl) Bevestigingsinrichting.
NL7413439A (nl) Elektronische schakelinrichting.
NL7503872A (nl) Beveiligingsschakeling.
BE818412A (fr) Sonnerie de tonalite electronique
BE776862A (fr) Systeme de communication electronique
BE842157A (fr) Dispositif de transport de parties estampees
NO144554C (no) Elektrisk telefonkrets.
BE782516A (fr) Dispositif de commande electronique
NL7606739A (nl) Bevestigingsinrichting.
BE762016A (fr) Dispositif de telecommunication
BE790492A (fr) Systeme de surete electronique
NL7402575A (nl) Elektronisch telefoontoestel.
NL7612113A (nl) Stereodemodulatorschakeling.
SE7505655L (sv) Likstromstellarkrets.
BR7500460A (pt) Sistema de telefonia eletronica de comutacao temporal
SE386333B (sv) Elektronisk tidsbestemningskrets.
CH550520A (de) Fernsprechteilnehmerschaltung.
NL7601779A (nl) Bevestigingsinrichting.
BE823068A (fr) Circuit electronique de securite
NL7613156A (nl) Electronische signaalschakelinrichting.
BE789970A (fr) Dispositif electronique de modulation de courant, notamment de tonalitede faux-appels
BE771966A (fr) Dispositif de commutation electromagnetique