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1. (WO2011149462) SYSTEM AND METHOD FOR ROUTING PUSH-TO-TALK CALLS

Pub. No.:    WO/2011/149462    International Application No.:    PCT/US2010/036310
Publication Date: Dec 1, 2011 International Filing Date: May 27, 2010
IPC: H04B 7/00
Applicants: NII HOLDINGS, INC.
KHAN, Safwan, A.
RAJAN, Fnu
Inventors: KHAN, Safwan, A.
RAJAN, Fnu
Title: SYSTEM AND METHOD FOR ROUTING PUSH-TO-TALK CALLS
Abstract:
A call routing apparatus is provided, comprising a call handler configured to receive a call request from an origin handset in a local region, and to route call information from the origin handset to a destination handset m the local region, the call request including a destination handset identifier that identifies the destination handset, the destination handset identifier including a region identifier, a region core configured to determine whether the destination handset is m the local region or a remote region based on the region identifier, a provisioning system configured to determine routing information based on the region identifier if the region identifier identifies the remote region, the routing information including data necessary for routing the call to the remote region, and a gateway configured to route the call request to a remote gateway in a remote region based on the destination handset identifier and the routing information.