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. 20, 2001
Filed:
Oct. 21, 1997
Gunter Dueck, Neckargemünd, DE;
Karl Fleckenstein, Malsch, DE;
Thomas Holey, Waibstadt, DE;
Peter Korevaar, Heidelberg, DE;
Martin Mähler, Heidelberg, DE;
Andreas Rudolph, Heidelberg, DE;
Tobias Scheuer, Heidelberg, DE;
Heinrich Stuettgen, Bammental, DE;
Sven Viergutz, Heidelberg, DE;
Hans-Martin Wallmeier, Leimen, DE;
International Business Machines Corporation, Armonk, NY (US);
Abstract
Disclosed is a mechanism to control telecommunication connections via digital switching networks like the ISDN. Frequently observed scenarios are a caller who is connected to an answering machine, although he intended to talk to a human individual, or where a node is shared by more than one individual and the caller wants to talk to a definite person likewise. Subscriber information is interchanged between a calling device and a called device before setting up the connection which is utilized to inform the caller about the device type at the called side or to inform the called side about the desired person. In the ISDN, a called device sends an ALERTING message to a switching center before accepting the connection. The switching center forwards a part of that message to the calling device which includes the so-called USER—USER Information Element (UUIE). In that USER—USER IE, an information like “UNDER THE CALLED NUMBER AN ANSWERING MACHINE IS BECOMING ACTIVE” can be coded. The USER—USER IE is transmitted by the ISDN network transparently to the calling device and thus can be presented to the calling participant via a display device. Alternatively, a different dial tone can be generated by the calling device to inform the participant about the answering machine.