When it comes to VoIP, you need to know about emergency phone call information. V1 VoIP is dedicated to educating our customers about proper emergency VoIP information. For knowing the difference between emergency phone calls like ERL and ELIN is something we educate VoIP and PBX providers on.
ERL stands for Emergency Response Location. It is a specific geographic location to which a 911 emergency response team may be dispatched. For increased accuracy, to reduce response times, or to meet state E911 legislation, the PBX administrator may break down an organization’s campus or buildings into several different ERLs. This allows the organization to provide the PSAP with a 911 caller’s precise location, rather than simply the organization’s main billing address.
For example, each building within a floor or wing of a building may be considered its own ERL; within a given ERL there may be several phones or extensions. In some states, regulations require that organizations maintain ERLs of a specific size or identifiable area (e.g. one ERL per 1000 square feet or per floor).
ELIN stands for Emergency Location Identification Number. ELIN is a ten digit DID number purchased from the local exchange carrier (LEC), and is one way for organizations to provide specific location information to the PSAP for a 911 call. First, enterprise administrators assign an ELIN to each ERL; one ELIN can be used for many phones within an ERL, but each ERL requires at least one unique ELIN. This mapping of ELINs to ERLs must then be loaded into the regional ALI database.
During a 911 call, the ELIN takes the place of the caller’s telephone number as the ANI and is used to route the call to the appropriate PSAP. The PSAP uses the ELIN to query the ALI database and retrieve the caller’s location (i.e. ERL). Should the caller be disconnected, the PSAP can also use the ELIN to call back the extension directly (which requires a temporary mapping of the 911 caller’s number to the ELIN), bypassing the PBX attendant or auto-attendant.
To find out more about emergency VoIP information and making sure you have proper e911 coverage, contact a member of the V1 VoIP team to make sure your e911 status is up to date.