SYSTEM WHICH COUNTS DURATION OF TELEPHONE TALKS

FIELD: electric communication, in particular, limitation of duration of telephone conversations and payment for excess time using standard rate. SUBSTANCE: Device uses code of total time of telephone conversations as protection number which is encrypted and transmitted to telephone exchange when con...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	LIVSHITS G.E, KUZNETSOV V.F, MJAGKOV I.V, MISHENKOV S.L
Format:	Patent
Sprache:	eng
Schlagworte:	ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY TELEPHONIC COMMUNICATION
Online-Zugang:	Volltext bestellen
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