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Microsoft® Lync® Server 2013 Unleashed Second Edition by Randy Wintle, Alex Lewis, David Ross, Tom Pacyk

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Emergency Location Identification Number

Another method for providing detailed address information is through the use of Emergency Location Identification Numbers. Consider an organization that has multiple floors in a single building, and a single PRI circuit for phone calls. When an emergency call is placed, the PSAP can see the physical address for the organization based on the circuit, but no information is passed about which floor the emergency responders should go to. The PSAP has a main number that can be called back, but that number might route to a receptionist who has no idea someone in the building has tried calling emergency services.

An ELIN is a unique phone number that identifies a particular Emergency Response Location (ERL). ...

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