This recipe guides you through the process of establishing an emergency contact number for your office.
An emergency call, such as 911 in North America, is first routed to a PSAP (Public Safety Answering Point). The PSAP will look up the ANI (calling number) from ALI-DB (Automatic Location Information Database) to determine the caller’s physical address. The ALI-DB is updated by the PSTN service provider when a customer subscribes its trunk service. The record in the ALI-DB should be a mapping between a phone number (or trunk) and its physical address. For each emergency call, the PBX is responsible for setting the correct ANI for the PSAP.
If you prefer a video tutorial covering the following procedure, see the video located here.
Configuring the Emergency Number
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