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:
Sep. 13, 2022
Filed:
Mar. 07, 2019
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Muneaki Ogawa, Tokyo, JP;
Kenjiro Arai, Tokyo, JP;
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Abstract
It is possible to appropriately avoid erroneous call disconnection between interconnected networks at a low cost without modifying an apparatus in the network. A disconnection monitoring termination apparatusis connected between a first networkfor monitoring for inability to communicate RTP packets in a second networkby using a disconnection monitoring timer and the second network for accommodating terminals that do not send a hold signal, monitors for the inability to communicate the RTP packets in the second networkby using the disconnection monitoring timer for second network monitoring having a value smaller than a value of the disconnection monitoring timer of the first network, and when detecting the inability to communicate the RTP packets in the second network, the disconnection monitoring termination apparatussends an UPDATE request or a re-INVITE request including an SDP offer in which a direction attribute of 'a=recvonly' is set, to the first network