Device and method for cleaning telephone number list
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United States of America Patent
Stats
-
Aug 18, 1998
Grant Date -
N/A
app pub date -
Feb 21, 1997
filing date -
Jun 26, 1995
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A cleaning system retrieves a telephone number from a telephone number list to regard as a called party number and sends a SETUP message to the network, in which an unrestricted digital information is designated as a bearer capability. In case that an ALERTING or CONNECT message is sent back from the network, the system sends a DISCONNECT message to the network immediately to perform a clear sequence and determines the telephone number effective. In case that a DISCONNECT message is sent back from the network as a result that a call has not been accepted, the system also performs a clear sequence immediately and determines if the telephone number should be treated as an effective number or a null number according to the cause content sent from the network.
First Claim
Family
International Classification(s)
Cited Art Landscape
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