公开(公告)号：US09832309B2

公开(公告)日：2017-11-28

申请号：US15312923

申请日：2015-07-05

Applicant: MOTOROLA SOLUTIONS, INC.

Inventor： Xun Fei ,  Dajun Chen ,  Yong Tian ,  Hongxia Wang

IPC: H04M3/42 ,  H04M3/436 ,  H04M1/2745

CPC classification number: H04M3/42102 ,  H04M1/274508 ,  H04M1/274516 ,  H04M3/08 ,  H04M3/42 ,  H04M3/42382 ,  H04M3/436 ,  H04M2201/16 ,  H04M2201/18 ,  H04M2201/36 ,  H04M2203/558 ,  H04M2242/22

Abstract: A method and apparatus for detecting a stale number. A stale number detection device obtains a call number, a call number contact creation date, and a call number issue date for the call number. The stale number detection device determines that a stale number state exists when the call number issue date is later than the call number contact creation date. The stale number detection device generates a stale number notification based on the stale number state.