| Term | Description |
T9 | T9 - Look at Predictive Text Input.
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TACS | TACS - Total Access Communications System (an AMPS variant deployed in a number of countries principally the UK)
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Talk-time | Talk-time - The length of time a battery can power a mobile phone when making or receiving calls
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TAP | TAP - Transferred Account Procedure; the essential charging methodology for international GSM roaming. There have been four TAP standards, TAP1, TAP2, TAP2+ and TAP3. The latter offers variable record length and is sufficiently flexible to support all future requirements arising from the move to 3G
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TBR | TBR - Technical Basis for Regulation (part of the ETSI standardisation process)
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TCH | TCH - Traffic Channel
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TD-CDMA | TD-CDMA - Time Division CDMA
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TD-SCDMA | TD-SCDMA - Time Division-Synchronous CDMA; a CDMA variant developed by Chinese vendors which is claimed to offer high data rates and greater coverage
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TDD | TDD - Time Division Duplex; a radio technology for use in unpaired spectrum. WCDMA/UMTS includes a band for TDD mode usage and both PHS and DECT use this technology
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TDMA | TDMA - Time Division Multiple Access; a technique for multiplexing multiple users onto a single channel on a single carrier by splitting the carrier into time slots and allocating these on a as-needed basis
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Telematics | Telematics - A wireless communications system designed for the collection and dissemination of information, particularly refers to vehicle-based electronic systems, vehicle tracking and positioning, on-line vehicle navigation and information systems and emergency assistance
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TETRA | TETRA - Terrestrial Trunked Radio; a European developed digital private mobile radio technology which is now being extensively deployed worldwide
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Tetrapol | Tetrapol - A competitive digital PMR technology to TETRA developed by French vendors
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TFD | TFD - Thin Film Diode. A type of LCD display technology. TFD technology combines the excellent image quility and fast response times of TFT, with the low power consumption and low cost of STN.
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TFT | TFT - Thin Film Transistor. A type of LCD display technology. Compared to other types of LCD technology, TFT features excellent image quality and response time, but uses more power, and is more expensive.
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TFTS | TFTS - Terrestrial Flight Telephone System
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Timeslot | Timeslot - A frame within a TDMA schema; has a time interval of 576 microseconds. Physical content of a timeslot is known as a burst. Five different burst types exist, they are distinguished by different TDMA frame divisions (see NB, FB, SB, AB and DB)
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TIPHON | TIPHON - Telecommunications and Internet Protocol Harmonisation over Networks; an ETSI project designed to support the market for voice communications and voice band communications. In particular TIPHON will ensure that users on IP-based networks can communicate with those on circuit switched networks
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TMN | TMN - Telecommunications Management Network
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TMSI | TMSI - Temporary Mobile Subscriber Identity; covers the IMSI to prevent over-the-air interception and tracing
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TRAU | TRAU - Transcoder Rate Adapter Unit; the transport unit for a 16kbit/s traffic channel on the A-bis interface
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Tri-band | Tri-band - Refers to a mobile phone able to operate on the three internationally designated GSM frequencies- 900, 1800 and 1900MHz
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TrueSync | TrueSync - A technology which enables the optimal synchronisation of calendars, address books, action lists and memoranda. It enables multi-point, one-step synchronisation of wireless and wireline devices, desktop computers and server-based applications and services
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TRX | TRX - Transmitter/receiver (transceiver)
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