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There are 44 names in this directory beginning with the letter T.
TACS: Total Access Communication System

Total Access Communication System (TACS) is the European version of AMPS — the 1G technology for mobile wireless. ETACS was an extended version of TACS with more channels. TACS and ETACS are now obsolete in Europe, having been replaced by the more scalable and all-digital GSM system.

TAMS: Track and Manage Service

Track and Manage Service (TAMS) offers scheduled reporting on the status reports of industry standard sensors, GPS position and other event status reports.

TAP: Telocator Alphanumeric Protocol

Telocator Alphanumeric Protocol (TAP) is a simple protocol dedicated to the forwarding of alphanumeric pages. Although the features and capabilities of TAP are in TDP, the TAP protocol may co-exist with TDP. The TAP protocol may be utilized to forward binary data to RF-linked computers if input is formatted and processed.

TCH: Traffic Channel

Traffic Channel (TCH) is a logical channel that allows the transmission of speech or data. In most second generation systems, the traffic channel can be either full or half rate.

TCH/F: Traffic Channel – full rate

Traffic Channel – full rate (TCH/F) is a traffic channel using full rate voice coding.

TCH/H: Traffic Channel – half rate

Traffic Channel – half rate (TCH/H) is a traffic channel using half rate voice coding.

TCM: Trellis Code Modulation

Trellis Coded Modulation (TCM) is one of the coded modulation techniques used in digital communications. It combines the choice of a modulation scheme with that of a convolutional code together for the purpose of gaining noise immunity over encoded transmission without expanding the signal bandwidth or increasing the transmitted power.

TCP: Telocator Conversion Processor

Telocator Conversion Processor (TCP) is a front end processor which executes the Telocator Format Conversion (TFC) process.

TCS: Telephony Control Protocol Specific

The Telephony Control Protocol Specification (TCS) is a protocol in the Bluetooth protocol stack that defines ways to send audio calls between Bluetooth devices. It also controls the device mobility management procedures. It can be used to create a three-in-one phone:
1) On the move, a mobile phone connected to a cellular network;
2) At home, a cordless phone connected to a PSTN via a gateway or base station;
3) At the office, an intercom.

TD-CDMA: Time Division, Code Division Mu

Time Division, Code Division Multiple Access (TD-CDMA) is a 3G proposal combining elements of TDMA and CDMA. It is developed and used primarily in China, combining time division multiplexing with CDMA techniques.

TD-SCDMA: Time Division Synchronous Code

Time Division Synchronous Code Division Multiple Access (TD-SCDMA) is a new technology developed by Siemens and the China Academy of Telecommunication Technology (CATR). TD-SCDMA is part of the ITU 3G standard harmonization and will likely be adopted by some operators in China. This proposed standard is 1.6 MHz wide and uses multiple timeslots, synchronous CDMA, and new detection and interference cancellation schemes.

TDD: Time Division Duplex

TDD: Time Division Duplex Time Division Duplexing (TDD) refers to a transmission scheme that allows an asymmetric flow for uplink and downlink transmission which is more suited to data transmission. In a Time Division Duplex system, a common carrier is shared between the uplink and downlink, the resource being switched in time. Users are allocated one or more timeslots for uplink and downlink transmission.

TDMA: Time Division Multiple Access

Time Division Multiple Access (TDMA) divides a radio frequency available to a network into time slots and then allocates slots to multiple calls. So one frequency can support multiple, simultaneous data channels, using bandwidth more efficiently than earlier technologies. Available in 800-MHz or 1900-MHz frequencies, TDMA is used by the GSM digital cellular system.

TDN: Temporary Directory Number

Temporary Directory Number (TDN) is a temporary identification number assigned to a mobile while attached to the network.

TDP: Telocator Data Protocol

Telocator Data Protocol (TDP) is a suite of protocols used for sending messages from a computer, through a paging system, to a mobile receiving computer. Together, these protocols define the flow of messages from input devices through several processing steps until the entire message is received by an RF-linked computer. The set is compromised of several protocols, including TME, TRT, and TMC.

TDTD: Time Division Transmit Diversity

Time Division Transmit Diversity (TDTD) is a technique utilizing multiple transmit stations to originate the downlink signal and improve performance. The transmit station used can be determined by either a fixed pattern or based on a QoS measurement made at the mobile. See also STD and TSTD.


Telematics means the integration of wireless communications, vehicle monitoring systems and location devices.

TFC: Telocator Format Conversion

Telocator Format Conversion (TFC) describes how binary data messages may be forwarded to RF-linked computers through the use of TAP protocol.

TIA: Telecommunications Industry Associa

Telecommunications Industry Association (TIA) is one of the Telecommunications standards setting bodies in the United States.

TID: Tunnel Identifier

Tunnel Identifier (TID), containing an MM Context ID and an NSAPI, is used to identify a GTP tunnel between two GSNs in a GPRS network. A tunnel is created whenever an SGSN sends a Create PDP Context Request in a GPRS network.

Time dispersion

Time dispersion is a manifestation of multipath propagation that stretches the signal in time so that the duration of the received signal is greater than the transmitted signal.

Time diversity

Time diversity is the technique used by CDMA systems to overcome the effects of multipath fading. Through the use of a rake receiver, individual elements or fingers can be offset in time to account for different arrival times of multipath signals.


TinyOS is an open source component-based operating system and platform targeting wireless sensor networks. TinyOS is an embedded operating system, written in NesC programming language, as a set of cooperating tasks and processes. It is designed to be able to incorporate rapid innovation as well as to operate within the severe memory constraints inherent in sensor networks. It is intended to be incorporated into smartdust.

TIPP: Telocator Interswitch Paging Proto

Telocator Interswitch Paging Protocol (TIPP) is a TCP/IP-based inter-PMP protocol utilized to move information across a network of PMP's

TKIP: Temporal Key Integrirty Protocol

Temporal Key Integrity Protocol (TKIP) is part of the IEEE 802.11i encryption standard for wireless LANs security. TKIP utilizes RC4 stream cippher with 128 bit key for encryption and 64 bit key for authentication. TKIP is the next generation of WEP (Wired Equivalency Protocol). TKIP provides per-packet key mixing, a message integrity check and a re-keying mechanism, thus fixing the flaws of WEP.

TMC: Telocator Mobile Computer Protocol

Telocator Mobile Computer Protocol (TMC) is the protocol that operates between the Radio Frequency (RF) receiver and the mobile computer, which is the ultimate recipient of data sent from the Message Entry Device (MED).

TME: Telocator Message Entry Protocol

Telocator Message Entry Protocol (TME) defines the protocol operating between the Message Entry Device (MED) and Paging Message Processor (PMP).

TMSI: Temporary Mobile Station Identity

Temporary Mobile Station Identity (TMSI) is an identification number assigned to a mobile station while it is attached to the network. This number is maintained in the VER and SIM while the mobile is attached to the network and is used to route calls to and from the mobile.

TOA: Time OF Arrival

Time OF Arrival (TOA) is a location technique that uses GSM timing to triangulate the position of a handset relative to active base stations. Accuracy is good indoors and in areas of dense base-station coverage, and TOA can be used with legacy handsets. Specialized equipment is needed at the base station, however, and planning, deployment, and maintenance costs can be high.


Transcoding refers to the operation of changing data from one format to another, such as an XML to HTML, so the output will be displayed in an appropriate manner for the device

Transmission Frequency

Transmission Frequency is the rate in hertz at which a radio transmitter repeats a signal pattern. It is also a code number that the wireless service company assigns to represent a single frequency or set of frequencies.

Transmit Power

Transmit Power is the amount of power used by a radio transceiver to send the signal out. Transmit power is generally measured in milliwatts, which you can convert to dBm.


Transmitter is a device that generates radio waves and sends them to the antenna.

TrGW: Translation Gateway

Translation Gateway (TrGW) is a component used in the IP Multimedia Subsystem (IMS) network, which provides translation of IPv4/IPv6 address and port numbers, as well as translation of IPv4 and IPv6 protocols.


Tri-band refers to a wireless phone that works on three bands. CDMA and TDMA tri-band phones work on 1900MHz and 800MHz digital frequencies, and 800MHz analog cellular — popular standards in the United States. Tri-band GSM phones are all digital, operating on 1900Mhz in the United States and 1800Mhz and 900Mhz in other countries.

Tri-mode: Triple mode (tri-mode)

Triple mode (Tri-mode) is a combined analog and digital mobile phone. Allows operation of the phone in the existing analog system at 800 MHz and in digital systems at both 800 MHz and 1900 MHz.

TRT: Telocator Radio Transport protocol

Telocator Radio Transport protocol (TRT) describes the format of data which is forwarded to RF receivers. This transport style protocol allows a receiver to collect several separate message inside different pages and then piece them together into one proper message. The manner in which this data is inserted into any particular radio pager encoding format is specific to the particular manufacturer's radio receiver.

TSTD: Time Switched Transmit Diversity

Time Switched Transmit Diversity (TSTD) is a technique utilizing multiple transmit stations to originate the downlink signal and improve performance. The transmit station used is determined by a fixed selection pattern similar to frequency hopping. See also STD and TDTD.

TTA: Telecommunications Technology Assoc

Telecommunications Technology Association (TTA) is a telecommunications standards setting body in Korea.

TTC: Telecommunications Technology Commi

Telecommunications Technology Committee (TTC) is a private-sector corporate body established in 1985 to prepare domestic standards relevant to Japanese telecommunications

TTG: Transmit/receive Transition Gap

Transmit/receive Transition Gap (TTG), a concept in the mobile wireless networking, is a gap between the last sample of the downlink burst and the first sample of the subsequent uplink burst in a time division duplex (TDD) transceiver. This gap allows time for the base station (BS) to switch from transmit to receive mode. During this gap, the BS is not transmitting modulated data but simply allowing the BS transmitter carrier to ramp down, the transmit/receive (Tx/Rx) antenna switch to actuate, and the BS receiver section to activate.

TTI: Transmission Time Interval

Transmission Time Interval (TTI) is a parameter in UMTS (and other digital telecomunication networks) related to encapsulation of data from higher layers into frames for transmission on the radio link layer. TTI refers to the length of an independently decodable transmission on the radio link. The TTI is related to the size of the data blocks passed from the higher network layers to the radio link layer.

Turbo Code

Turbo code is a class of high-performance error correction codes finding use in deep-space satellite communications and other wireless communication applications where designers seek to achieve maximal information transfer over a limited-bandwidth communication link in the presence of data-corrupting noise. There are two types of turbo codes, Block Turbo Codes (BTCs) and Convolutional Turbo Codes (CTCs), which are quite different since they use different component codes, different concatenation schemes and different SISO algorithms.

TWO – WAY Communication

Two – Way Communication occur between communications of radio stations, each having a transmitter and receiver. The stations may be in fixed locations, mobile or portable ones, or in any combination.

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