Patent Number: 8,218,462

Title: Mobile communication device receipt through second telecommunication network of call directed to registration in first telecommunication network

Abstract: A network infrastructure device of an apparatus in one example comprises a first external interface and a second external interface. The network infrastructure device communicates with a first telecommunication network through the first external interface. The network infrastructure device communicates with a second telecommunication network through the second external interface. The network infrastructure device allows a mobile communication device that has a first registration in the first telecommunication network and a second registration in the second telecommunication network to receive, through the second telecommunication network, a call directed to the first registration. The first telecommunication network is unable to directly query the second telecommunication network for a status of the second registration.

Inventors: Ejzak; Richard P. (Wheaton, IL), Gayde; Ruth Schaefer (Naperville, IL), Rudolph; Michael J. (Naperville, IL)

Assignee: Alcatel Lucent

International Classification: H04B 7/00 (20060101); H04W 4/00 (20090101); H04W 40/00 (20090101); H04L 12/66 (20060101); H04L 12/28 (20060101)

Expiration Date: 2020-07-10 0:00:00