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US Patent 7386302 Hotline routing of pre-activated GSM subscribers using pseudo-MSISDNs

Patent 7386302 was granted and assigned to AT&T Mobility on June, 2008 by the United States Patent and Trademark Office.

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Patent abstract

The present invention relates to hotline routing of calls originating from mobile stations. The hotline routing conserves MSISDNs for valid subscribers and provides a relatively generic solution. In one example, a computer system stores in a location register a subscriber profile with an IMSI and a pseudo-MSISDN. A mobile station (which includes a SIM with the IMSI) originates a call. After translation of the pseudo-MSISDN, a serving MSC routes the call to a service activation center.

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