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:
Sep. 29, 2015
Filed:
Nov. 24, 2008
Ola Melander, Wuerselen, DE;
Joerg Christian Ewert, Aachen, DE;
Ola Melander, Wuerselen, DE;
Joerg Christian Ewert, Aachen, DE;
TELEFONAKTIEBOLAGET L M ERICSSON (PUBL), Stockholm, SE;
Abstract
The present invention is directed to a method, a switching server, a terminal device and system for providing circuit switched calls and services to terminal devices connected to a switching server via an IP Multimedia Subsystem. The method comprises a step of providing (S) a first interworking entity () in the terminal device () for interworking between circuit switched signalling messages and signalling messages related to packet switched sessions towards the IMS (). The method further comprises providing (S) a second interworking entity () in the switching server () towards the IMS (). The terminal device () is thus capable of accessing circuit switched calls and services directly from the switching server ().