FE (Functional Element): Difference between revisions

|-

| Bridge || Bridges (also referred to as "conference bridge" or "conference server") are used in NG9-1-1 to transfer calls and conduct conferences. These have a SIP signaling interface to create and maintain conferences and media mixing capability. Conference Servers MUST be multimedia-capable (voice, video, text). In some deployments, all emergency calls are answered at a “Conference-Aware UA” which acts as a B2BUA until/unless a transfer or conference is needed, in which case it becomes the "Conference Bridge". When calls are "answered at a bridge" and when calls are forwarded by a bridge, the bridge generates an EIDD. {{NGCS}} {{EIDD}}

 

|-

|Conference Server (or Conference Aware UA)

|Conference Servers are used in NG9-1-1 to transfer calls and conduct conferences. These have a SIP signaling interface to create and maintain conferences and media mixing capability. Conference Servers MUST be multimedia capable (voice, video, text).  In some deployments, all emergency calls are answered at a “Conference Aware UA” which acts as a B2BUA until/unless a transfer or conference is needed, in which case it becomes the Conference Server.

|-

| [[ECRF (Emergency Call Routing Function)]] || The routing database in NG9-1-1 which takes location (in civic or geo forms) and a “Service URN” and returns a route in the form of a URI to the next hop in the path the call should take. The ECRF is an instance of a LoST (RFC 5222) server. {{NGCS}}

|-

| EIDD Endpoint FE || This is an FE used by entities outside of the PSAP and Core Services to exchange EIDDs with intra-ESInet entities. {{EIDD}}

|-

| [[ESRP (Emergency Services Routing Proxy)]] || The ESRP is an instance of a SIP Proxy Server; an intermediary which routes calls. Note that an ESRP contains a Policy Routing Function, but the PRF is not a separate FE. {{NGCS}}

|-

| [[GCS (Geocode Service)]] || An NG9-1-1 service providing geocoding and reverse-geocoding. {{NGCS}}

|-

|-

| IMR (Interactive Media Response) System || An automatic multimedia call answering function that can play (multimedia) prompts, accept input (via DTMF or other forms) and record media. A multimedia form of IVR (Interactive Voice Response). {{PSAP}}

|-

|-

| [[LIS (Location Information Server)]] || A database that stores locations of endpoints. A LIS can provide Location-by-Reference, or Location-by-Value, and, if the latter, in geodetic or civic forms. A LIS can be queried by an endpoint for its own location, or, in some circumstances, by another entity for the location of an endpoint. The LIS is also the entity that provides the dereferencing service, exchanging a location reference for a location value. {{NGCS}}

|- LNG (Legacy Network Gateway) || An NG9-1-1 Functional Element that provides an interface between an un-upgraded legacy origination network and the NGCS. Note that an LNG contains a Location Interworking function (LIF), a Protocol Interworking Function (PIF) and an NG9-1-1 Interworking Function (NIF), but the LIF, PIF and NIF are not separate FEs. {{NGCS}}

|-

|-

| Logging Service || An event and media logger. The Logging Service accepts log event records and media streams in a standardized form, stores them, and provides a standardized retrieval function for these records. {{PSAP}} {{NGCS}} {{EIDD}}

| [[Policy Store]] || A database that holds policy rules. {{PSAP}} {{NGCS}}

|-

|-

| SR (Selective Router) || The Central Office switch that provides the tandem switching of 9-1-1 calls. It controls delivery of the voice call with ANI to the PSAP and provides Selective Routing, Speed Calling, Selective Transfer, Fixed Transfer, and certain maintenance functions for each PSAP.<br />

Also known as Enhanced 9-1-1 Control Office, E9-1-1 Tandem

|-

|-

|-

| Call Handling || The Call Handling Functional Element is concerned with the details of the management of calls. It handles all communication from the caller. From NENA/APCO-REQ-001.1.1-2016 {{EIDD}} {{PSAP}}

|-

| Dispatch System || A Functional Element used to assign appropriate resources (emergency responders) to an incident, monitor the response and relay relevant information. Tracks and logs all transactions associated with the emergency response. From NENA/APCO-REQ-001.1.1-2016 {{EIDD}} {{PSAP}}

|-

|-

|-

|-

|-}

[[Category:Glossary]]