Patent ID: 6618600
Filing Date: 2003-09-09
Classification: H04W

Abstract:
In a wireless centrex system, a method for alerting a mobile station of a call directed to a subscriber's directory number from a predetermined directory number, said method comprising the steps of:receiving a call from a call-originating directory number directed to a directory number of a subscriber via a line side interface of a local digital switch at an intelligent transceiver of said wireless centrex system, said local digital switch being in communication with said intelligent transceiver via a wireline interface without being connected through any public cellular system to said intelligent transceiver, the subscriber having a mobile station currently registered with said intelligent transceiver of said wireless centrex system; comparing the call-originating directory number with a list of at least one predetermined directory number; when the call-originating directory number matches a predetermined directory number in the list, retrieving distinctive call ring information associated with the call-originating directory number; routing the call to the mobile station via said local digital switch and said intelligent transceiver; and transmitting the distinctive call ring information to the mobile station by said intelligent transceiver of said wireless centrex system.