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:
Feb. 10, 2009
Filed:
Jan. 23, 2004
Toru Yoshihara, Koriyama, JP;
Shinya Suzuki, Koriyama, JP;
Kazunori Katagiri, Koriyama, JP;
Hitachi Communication Technologies, Ltd., Tokyo, JP;
Abstract
Since in a system of the invention comprising a TU portionfor accommodating general extension telephonesand PSTN, and a TM portionfor performing a call control with a packet network, call control information from the PSTNand the like to the packet network is received by the TU portionand then transferred to the TM portionand converted into call control data adapted to the packet network, and voice data from the PSTNand the like to the packet network is received by the TU portionand then converted into voice data adapted to the packet work, it is possible to use a packet network such as the Internet, convert voice data into IP packet data and thereby provide a communication service equivalent to a conventional circuit switching service at low cost.