In communications network operations, a record that indicates the interconnections between pairs of nodes in the network, and is used to produce direct routes, alternate routes, and available route tables from point to point. [From Weik '89]

Procedures that permit a signaling point to determine the accuracy and consistency of its routing data by sending a test message and analyzing the response message to determine whether the sent message traversed the expected route. [T1.226-1992]

A system, maintained by the TFNA that enables Resp Orgs to administer Toll-Free Number Resp Org Changes and store the associated Letter of Agency (LOA) along with supporting documentation in a centralized location.
A real-time, API based routing product that contains authoritative Toll-Free routing instructions downloaded from the TFN Registry.

In data communications, a functional unit used to interconnect two or more networks.
Note 1: Routers operate at the network layer (layer 3) of the ISO Open Systems Interconnection--Reference Model.
Note 2: The router reads the network layer address of all packets transmitted by a network, and forwards only those addressed to another network.

A computer program, called by another program, that may have some general or frequent use.

A category of precedence to be used for all types of messages that justify transmission by rapid means unless of sufficient urgency to require a higher precedence. [JP 1-02]

The process of determining and prescribing the path or method to be used for establishing communications sessions.

Synonym routing number, routing table.

The application of rules during the process of routing so as to chose or avoid specific networks, links or relays [7498-2].

The RDF provides routing information for an emergency session based upon the location information in a request from the LRF.