Telephonic communications – Having light wave or ultrasonic link for speech or paging... – Including fiber optic link within telephone network
Patent
1996-05-21
1997-11-18
Kuntz, Curtis
Telephonic communications
Having light wave or ultrasonic link for speech or paging...
Including fiber optic link within telephone network
379 58, 379 45, 455 331, H04Q 700, H04Q 900, H04M 1100, H04M 1104
Patent
active
056895488
ABSTRACT:
When establishing an emergency call connection towards a Public Safety Answering Point (PSAP) terminal for a mobile subscriber, instead of transmitting the Mobile Station Integrated Service Directory Number (MSISDN) assigned to the mobile station, a directory number assigned to the serving mobile switching center/visitor location register (MSC/VLR) is transmitted as the Calling Party Number. The MSISDN number is stored into the Generic Address Parameter (GAP) within the transmitted Initial Address Message (IAM) signal. When the PSAP attempts to call back the mobile station in response to a disconnection of the original emergency call connection, the PSAP transmits another IAM signal with the received MSC directory number as the Called Party Number. Once the setup signal is routed to the serving MSC/VLR, an application module within the serving MSC/VLR extracts the MSISDN from the GAP to call back the proper mobile station.
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Alperovich Vladimir
Maupin Alain Guy
Ericsson Inc.
Kuntz Curtis
Tieu Binh K.
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