1. The elapsed time for transit of a signal over a closed circuit.
Note: Round-trip delay time is significant in systems that require two-way interactive communication such as voice telephony or ACK/NAK data systems where the round-trip time directly affects the throughput rate. It may range from a very few microseconds for a short line-of-sight (LOS) radio system to many… (Read More →)

Deleting the least-significant digits of a number and applying some rule of correction to the part retained. [After SMPTE]

1. In communications systems operations, the geographical path that is followed by a call or message over the circuits that are used in establishing a chain of connections.
2. To determine the path that a message or call is to take in a communications network.
Note: In a Transmission Control Protocol/Internet Protocol (TCP/IP) internet, each IP datagram is routed separately.… (Read More →)

The allocation of circuits between two points over more than one geographic or physical route with no geographic points in common.

A pointer to a specific trunk group. [T1.667-1999]

A specific list of trunk groups. [After T1.667-1999]

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.