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:
Dec. 14, 2021
Filed:
Apr. 09, 2019
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Kenjiro Arai, Tokyo, JP;
Muneaki Ogawa, Tokyo, JP;
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Abstract
An SIP proxy serverincludes a forking termination unit. The forking termination unitis configured to: in response to receiving an Initial INVITE request message from a originating-side network, transmit the Initial INVITE request message to an incoming-side network, and in response to receiving an 18X response message at the first time from the incoming-side network, transmit the 18X response message received at the first time to the originating-side network. The forking termination unitestablishes Early dialog #0 between the SIP proxy server and the originating-side networkand establishes Early Dialog #1 that is compatible with an incoming-side terminalthat is a transmission source of an 18X response message received at the first time. In response to receiving 18X response message at the second time from the incoming-side network, the forking termination unitestablishes Early Dialog #2 that is compatible with the incoming-side terminalthat is a transmission source of the 18X response message received at the second time.