A dial tone generator outputs a particular dial tone to a party to indicate that a call block feature is enabled for the party. The call block feature is disabled for the party in response to a number of incoming calls for the party being greater than or equal to a threshold.
申请公布号
US7657009(B2)
申请公布日期
2010.02.02
申请号
US20060434673
申请日期
2006.05.16
申请人
AT&T INTELLECTUAL PROPERTY I, LP
发明人
JOY JENNIFER LYNNE;WEBER MARKUS;SCHOLL THOMAS BRADLEY
