The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 10, 2016
Filed:
Apr. 28, 2010
Anand Raghawa Prasad, Tokyo, JP;
Thilo Ewald, Heidelberg, DE;
Toshiyuki Tamura, Tokyo, JP;
Stefan Schmid, Heidelberg, DE;
Anand Raghawa Prasad, Tokyo, JP;
Thilo Ewald, Heidelberg, DE;
Toshiyuki Tamura, Tokyo, JP;
Stefan Schmid, Heidelberg, DE;
NEC CORPORATION, Tokyo, JP;
Abstract
To improve detection accuracy of SPIT, first, an identification information gathering apparatus receives various identification information from an IP phone terminal which has transmitted an INVITE message. A PUCI server generates bind identification information by binding or associating various identification information received from an identification information gathering apparatus via an SIP server and registers the bind identification information to a gray list stored in a list storing portion. A SPIT determination portion evaluates the bind identification information in reference to the gray list and determines whether or not the session start request from the IP phone terminal is allowed.