A 3-5 digit number that represents one or more ESZs, and is defined as one of two types: Administrative ESN or Routing ESN.

A 3-5 digit number that represents one or more ESZs, and is defined as one of two types: Administrative ESN or Routing ESN.

The ESQK identifies a 911 call instance processed through a VoIP Positioning Center (VPC). An ESQK is associated with a Selective Router/Emergency Service Number combination. The ESQK is used to route the call and is delivered to the PSAP as the calling number/ANI for the call, and is subsequently used by the PSAP to request ALI information for the call.… (Read More →)

The first exchange in the call connection capable of invoking the routing portion of the RBTESC service. This may be a local exchange or a transit exchange. It recognizes the emergency call and determines the caller's emergency service zone (ESZ), the transfer number(s), and the priority of the call. [T1.628-1993]

An i3 functional element which is a SIP proxy server that selects the next hop routing within the ESInet based on location and policy. There is an ESRP on the edge of the ESInet. There is usually an ESRP at the entrance to an NG9-1-1 PSAP. There may be one or more intermediate ESRPs between them.

A local exchange that is capable of invoking the bridging and transfer portions of the RBTESC (routing, bridging and transfer of emergency service calls) service. The served user is directly connected to this exchange. [T1.628-1993]

A geographical area within the emergency service serving area in which all callers are served by the same set of emergency service agencies. [T1.628-1993]

A geographical area that represents a unique combination of emergency service agencies (e.g., Law Enforcement, Fire and Emergency Medical Service) within a specified 9-1-1 governing authority’s jurisdiction. An ESZ is represented by an Emergency Service Number (ESN) to identify the ESZ.

A managed IP network that is used for emergency services communications, and that can be shared by all public safety agencies. It provides the IP transport infrastructure upon which independent application platforms and core functional processes can be deployed, including, but not restricted to, those necessary for providing NG911 services. ESInets may be constructed from a mix of dedicated and… (Read More →)

A 10-digit number used for the purpose of routing an E911 call to the appropriate Public Service Answering Point (PSAP) when that call is originating from wireless equipment. The Emergency Services Routing Digit (ESRD) identifies the cell site and sector of the call origination in a wireless call scenario. The Emergency Services Routing Key (ESRK) uniquely identifies the call in… (Read More →)