Lucent Technologies Release 8.2 manual Tcp/Ip, Tdm

T-carrier Glossary

T-carrier

Ahierarchy of digital voice- and data-transmission systems used in North America and based on multiples of the capacity of the T-1line.

tandem switch

A switch within an electronic tandem network (ETN) that provides the logic to determine the best route for a network call, possibly modifies the digits outpulsed, and allows or denies certain calls to certain users.

tandem-through

The switched connection of an incoming trunk to an outgoing trunk without human intervention.

tandem tie-trunk network (TTTN)

A private network that interconnects several customer switching systems.

TCP

Transmission Control Protocol — Transport layer; Connection oriented, reliable.

TCP/IP

Transmission Control Protocol/Internet Protocol. A standard that lets different computer hardware and different operating systems (such as PCs, Apple computers, UNIX workstations, and mainframes) communicate with each other over a network. TCP/IP is the most complete, most widely accepted network protocol currently available.

TDM

See time-division multiplexing.

tie trunk

A telecommunications channel that directly connects two private switching systems.

time-division multiplexing

A way of interleaving digitized voice, video, and/or data so that several calls can be sent concurrently over the same spread of frequencies. TDM systems distribute the available bandwidth across a series of time slots and divide each input stream into a set of samples. They then assign successive time slots to the first sample in each input stream. They repeat the process until all time slots have been assigned or all inputs sent. At the far end, the receiver demultiplexes the transmission and reconstructs the original sequence of samples. Time-division multiplexing is typically used on circuit-switched networks.

Administration for Network Connectivity
555-233-504 — Issue 1 — April 2000	CID: 77730	487