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CIDB (Call Information Database)
- A call that passes through an
- origination network or service provider of any kind must have a Call info
- header with a URI that resolves to an Additional Call Data structure. The
- database that dereferences this URI is a Call Information Database. The additional information is accessed via an
- HTTP request using a specific "Additional Data" query
ECRF (Emergency Call
- The ECRF is a functional
- element in an ESInet which is a LoST protocol server where location information
- (either civic address or geo-coordinates) and a service URN (e.g.,
- PSAP/Routing, Police, Fire, Medical) are used to determine a URI associated
- with service requested. It also contains
- point data to support queries for a URI associated with an Additional Location
- Data Repository for a specific location.
Services IP Network)
- An IP-based inter-network
- (network of networks) shared by all agencies that may be involved in any
- emergency. It provides the IP transport
- infrastructure upon which independent application platforms and core services
- can be deployed. The term defines the
- network, not the services that ride the network.
Services Routing Proxy)
- 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 (terminating ESRP). There
- may be one or more intermediate ESRPs between them.
HELD (HTTP-Enabled Location Delivery)
- A protocol defined by the
- IETF (Internet Engineering Task Force) to deliver location using HTTP
- transport. It is used to retrieve
- PIDF-LO from the LIS.
- A Location Information Server supplies location,
- in the form of a PIDF-LO (location by value) or a location URI (location by
- reference), which is placed into the Geolocation header in the initial SIP
- message. The LIS also provides a
- “dereference” service for a location URI it supplies: given the URI, the LIS
- provides the location value as a PIDF-LO.
- PIDF-LO can be provided in geodetic and/or civic forms. Per the i3
- specification, clients utilize the HELD interface to communicate with the LIS
LIF (Location Interwork
- A subcomponent of the LNG,
- the LIF is the functional component of a Legacy Network Gateway which is
- responsible for taking the appropriate information from the incoming signaling
- (i.e., calling number/ANI, ESRK, cell site/sector) and using it to acquire
- location Information. The location
- information is used to route the emergency call and to provide location
- information to the PSAP.
LNG (Legacy Network
- A Legacy Network Gateway is a
- signaling and media interconnection point between callers in legacy
- wireline/wireless originating networks and the i3 architecture. The Legacy
- Network Gateway logically resides between the originating network and the
- ESInet and allows i3 PSAPs to receive emergency calls from legacy originating
LoST (Location to
- A protocol that takes
- location information and a Service URN and returns a URI. In NG9-1-1, used as
- the protocol for interfacing with the ECRF and LVF.
- The NENA i3 element that validates
- location information via LoST transactions.
- The LVF ensures that a civic address can be used to discern a route to a
- PSAP and the address is dispatchable.
- The Intrado solution will include a map-based interface to aid in the
- location validation process.
NIF (NG9-1-1 specific Interworking Function)
- A subcomponent of the LNG,
- it’s the functional component that provides processing of the legacy incoming
- call signaling, which includes the 10-digit key (e.g., TN, pANI, etc) that will
- be used as input for location retrieval, and once received, uses the location
- to determine a target ESRP.
Information Data Format – Location Object)
- Provides an XML structure
- that defines a location, in either geographic or civic address format. It’s often discussed as a transported in a
- SIP body or via the HELD protocol.
- A subcomponent of the LNG and
- LPG, it’s the functional component of a Legacy Network Gateway or Legacy PSAP
- Gateway that interworks legacy PSTN signaling such as ISUP or CAMA, with SIP
- The SIF is an interface
- between an authoritative copy of GIS data and functional elements that will use
- that data (e.g., an ECRF, LVF). The
- Intrado SIF performs validation and data normalization functions prior to the
- provisioning of the data into subsequent functional elements.
SIP (Session Initiation
- An IETF defined protocol
- (RFC3261) that defines a method for establishing multimedia sessions over the
- Internet. Used as the call signaling protocol in VoIP, i2 and i3
URI (Uniform Resource
- A predictable formatting of
- text used to identify a resource on a network (usually the Internet). E.g., the PSAP URI returned from a LoST
- routing request to the ECRF would direct the ESRP to the appropriate PSAP for
- the location it provided to the ECRF.