Telecommunications – Radiotelephone system – Emergency or alarm communication
Patent
1998-10-20
1999-08-10
Cangialosi, Salvatore
Telecommunications
Radiotelephone system
Emergency or alarm communication
455433, H04Q 700, H03M 1100
Patent
active
059373440
ABSTRACT:
An emergency call originates from a cellular radiotelephone (20) and communicates through one of A-side and B-side cellular systems. Upon receipt of the call, the cellular radiotelephone (20) is assigned a temporary substitute Mobile Identification Number (MIN) (100) by the receiving A-side or B-side cellular system MTSO (33). Upon termination of the emergency call, a call-back to the cellular radiotelephone (20) is routed to both of the A-side and B-side MTSOs (100), using the substitute MIN (100), by the Public Switched Telecommunications Network (36). Both A-side and B-side MTSOs (100) issue a page order message to cellular radiotelephone (20) by transmitting to the MIN (74). Paging order confirmation messages (78), conveying the MIN (74), are evaluated for a match with a unique Electronic Serial Number (76).
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patent: 5365570 (1994-11-01), Boubelik
patent: 5465388 (1995-11-01), Zicker
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patent: 5563931 (1996-10-01), Bishop et al.
patent: 5689548 (1997-11-01), Maupin et al.
patent: 5712900 (1998-01-01), Maupin et al.
Anderson Floyd E.
Cangialosi Salvatore
GTE Mobilnet Service Corporation
Suchyta Leonard Charles
LandOfFree
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