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:
Nov. 09, 2004
Filed:
Jul. 03, 2000
Applicant:
Inventors:
Takeo Orui, Tokyo, JP;
Takashi Okumura, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04M 7/00 ;
U.S. Cl.
CPC ...
H04M 7/00 ;
Abstract
A virtual private line connection method allowing efficient and economical virtual private line service in the public ISDN is disclosed. When a SS (common channel signalling system No. ) message is generated in response to a call originated by a terminal accommodated in a PBX, the SS message is encapsulated in an ISDN message and the ISDN message is sent to the destination PBX on a D channel. When the destination PBX receives the ISDN message, the SS message is read from the received ISDN message to establish the virtual private line between the PBXs.