The Fire and Emergency Services (F&ES) communications over a site's private telephone system must provide the originating telephone number to the emergency services answering point or call center through a transfer of Automatic Number Identification (ANI) or Automatic Location Identification (ALI) information.

Description

<VulnDiscussion>The implementation of Enhanced F&ES telecommunications services requires that the emergency services answering point or call center be able to automatically locate the calling party in the event they cannot provide their location. This is a two-part process. First the telephone system must be able to provide the answering station with the telephone number from which the emergency call originated. This is ANI information. Second, this phone number must be correlated to a physical address or location. This is called ALI information. ANI information comes from the telephone system controller. ALI information may come from an external database that associates the ANI information to the ALI information, or the telephone system controller may maintain the ALI database internally. If the ALI database is internal to the telephone system controller, emergency services answering point or call center only needs to receive ALI information, providing it contains the originating telephone number. For enterprise systems, the support for E911 by the enterprise Local Session Controller (LSC) (or any remote LSC construct) is governed by Federal Communications Commission (FCC) rules, as well as other federal, state, and local law. The design and implementation of all telephone system systems must include reasonable efforts to provide E911, even when the access connection to the Enterprise LSC is severed.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>