DEVICE AND METHOD FOR DETECTING PRESENCE OF SERVICE ON TELEPHONE LINE

A device and a method for detecting presence of service on a telephone line prior to and during activation of alternative service on the line. The method comprises performing a first voltage detection on a subscriber line (S 20 ), activating a subscriber line interface circuit (SLIC) if no pre-exist...

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Bibliographic Details
Main Authors WITTMAN, BRIAN, ALBERT, RAMEY, BLAINE, EDWARD
Format Patent
LanguageEnglish
French
German
Published 31.08.2011
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TELEPHONIC COMMUNICATION
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Summary:A device and a method for detecting presence of service on a telephone line prior to and during activation of alternative service on the line. The method comprises performing a first voltage detection on a subscriber line (S 20 ), activating a subscriber line interface circuit (SLIC) if no pre-existing service is detected (S 30 ), the SLIC providing an interface between the subscriber line and a service provider, and performing a second voltage detection on the subscriber line after a usage-dependent time has elapsed (S 60 ), the time being determined by heuristics which consider several factors, including usage history of the line and time of day.
Bibliography:Application Number: EP20030800309