Enhanced 9-1-1 (E9-1-1) is an emergency notification feature that associates the calling party’s telephone number with a civic or a street address. Using this information, the Public Safety Answering Point (PSAP) can immediately dispatch emergency services to the caller in distress.
To support E9-1-1, Skype for Business Server must be able to correctly associate a location with a client and to make sure that this information is used to route the emergency call to the nearest PSAP.
Before you deploy E9-1-1, you must already have deployed your Skype for Business Server internal servers, including a Central Management store, a Front End pool or a Standard Edition server. You must also deploy one or more Mediation Servers, either standalone or collocated with Front End Servers. In addition, an E9-1-1 deployment requires a SIP trunk to a qualified E9-1-1 service provider or an Emergency Location Identification Number (ELIN) gateway to your public switched telephone network (PSTN).
The following table provides an overview of the E9-1-1 deployment process.
Configure voice usages, routes, and trunk configurations
Create a new PSTN usage record. This is the same name that is used for the PSTN Usage setting in the location policy.
Create or assign a voice route to the PSTN usage record created in the previous step and then point the gateway attribute to the E9-1-1 SIP trunk or ELIN gateway.
For a SIP trunk E9-1-1 service provider, set the trunk that will be handling E9-1-1 calls over the SIP to pass PIDF-LO data by using the Set-CsTrunkConfiguration –EnablePIDFLOSupport cmdlet.
Optionally, for a SIP trunk E9-1-1 service provider, create or assign a local PSTN route for calls that are not handled by the E9-1-1 service provider’s SIP trunk. This route will be used if the connection to the E9-1-1 service provider is not available. If supported by your E9-1-1 service provider, assign a trunk configuration rule to the gateway that translates the 911 dial string into the direct inward dialing (DID) number of the national/regional Emergency Call Response Center (ECRC).