T1X1 

an ANSI standards sub-committee dealing with digital hierarchy and synchronisation

TA 

Terminal Adapter

TACACS 

Terminal Access Controller Access System

TAD 

Transmission & Access & Data

TAF 

Terminal Adaption Function

TAP 

Transfer Account Procedure

Tbd 

To be defined

TC 

TransCoder

TC 

Transmission Convergence

TCAP 

Transaction Capabilities Application Part

TCH 

Traffic Channel

TCP 

Transmission Control Protocol

TCR 

Tagged Cell Rate

TD-CDMA 

Time domain - code domain multiple access

TDD 

Time domainduplex

TDM 

Time Division Multiplexing

TDMA 

Time Division Multiple Access

TD-SCDMA 

Time Division

TE 

Terminal Equipment

TEX 

Tandem Exchange

TFCI 

Transport Format Combination Indicator

TFI 

Temporary Flow Identity

TFI 

Transport Format Indicator

TFO 

Tandem Free Operation

TIA 

Telecommunication Industries Association (US)

TID 

Tunnel Identifyer

TII 

Time-Independent Invocation

TIS 

Technical Information System

TLA 

Top Level Aggregate

TLD 

Top Level Domain

TLLI 

Temporary Logical Link Identity

TLS 

Transport Layer Security

TM 

Traffic Management

TMF 

TeleManagement Forum

TMN 

Telecommunication Management Network

TMSI 

Temporary Mobile Subscriber Identity

TOF 

Time Out Factor

TPC 

Transmit Power Control

TPC 

Transaction Processing Performance Council

TQL 

Technical Query Language

Transit Switch 

Switch connecting local switches between them

TRAU 

Transcoder/Rate Adapter Unit

TrFO 

Transcoder Free Operation

TS 

Time Slot

TS 

Traffic Shaping

TS 

Teleservice

TSC 

Transit Switching Center

TSG 

Technical Specification Group

T-SGW 

Transport Signalling Gateway

TSL 

Technical Scripting Language

TTC 

Telecommunications Technology Committee (Korea)

TTML 

Tagged Text Markup Language

TTP 

Trail Terminal Point

TTWO 

Trouble Ticket & Work Order Tool

TX 

Transmit