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. 23, 2003
Filed:
Jan. 19, 2000
Susumu Suga, Tokyo, JP;
Shoji Aizawa, Tokyo, JP;
Shinji Endo, Tokyo, JP;
Kazuhiro Takizawa, Tokyo, JP;
Ichiro Inoue, Tokyo, JP;
Other;
Abstract
An unscheduled terminal unit is prevented from being connected to conference communication or a scheduled terminal unit is prevented from being not connected to the conference communication, and security of the conference communication is improved, and also, a conference server for interconnecting many terminal units is connected to a private branch exchange and reservation tables for using the conference server are provided in order to surely charge users for conference communication service. When an incoming call for requesting connection of the conference communication comes to the private branch exchange, the validation is identified by whether the incoming call has been registered in the reservation tables or not, and the connection is rejected for the invalid incoming call.