Lifeline telephony provision for voice over digital subscriber line
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United States of America Patent
Stats
-
Aug 7, 2001
Issued Date -
N/A
app pub date -
Aug 16, 1999
filing date -
Aug 16, 1999
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A method, apparatus, and software for providing lifeline service during power failure affecting Customer Premises Equipment (CPE) in a Digital Subscriber Loop (DSL) arranged to carry voice traffic in band rather than on a separate analogue POTS band. The arrangement provides a reduced service, capable of supporting at least one voice call, to operate during such power failure and, where a single call is in progress during power failure, that call may be maintained during the transition from DSL to analogue POTS lifeline service. Where a call is in progress upon power restoration, the lifeline POTS service may be maintained until completion of the call so as not to interrupt a potential lifeline call.
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Family
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