| TACS/E-TACS |
First-generation mobile telephone system used
outside the Nordic countries and the USA. |
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| TCP/IP |
Transmission Control Protocol/Internet Protocol.
A protocol capable of linking different computer platforms across
the Internet. |
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| TDM |
Time Division Multiplexing is a scheme in which
numerous signals are combined for transmission on a single communications
line or channel. Each signal is broken up into many segments,
each having very short duration. |
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| TDD |
Time Division Duplex. This will be the second
variation of W-CDMA which will be standardised towards the end
of 2001, to appear commercially towards the end of 2003. This
version is especially suited to indoor environments where there
is a need for high traffic density. |
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| TDMA (ANSI-136) |
"TDMA" has been adopted as the new name for the
"Digital AMPS" (D-AMPS) mobile standard, now called ANSI-136,
used in the Americas, Asia Pacific and other areas. TDMA services
can be delivered in the 800 MHz and 1900 MHz frequency bands. |
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| TD-SCDMA |
Siemens developed this special transmission method
for UMTS together with the China Academy of Telecommunications
Technology (CATT). TD-SCDMA is to be used for setting up UMTS
mobile phone networks in China. It combines the SCDMA technique
developed by CATT with the TD-CDMA method proposed by Siemens
and other manufacturers. The S in 'SCDMA' refers to the special
synchronous mode: All radio base stations transmit and receive
synchronously: they prevent unavoidably occurring feedback interferences
with asynchronous radio methods. An advantage of the TD-SCDMA
technique is that it is also suitable for unpaired frequency
ranges (frequencies, duplex separation). |
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| Terminal |
A terminal can be a notebook computer, PC, TV,
phone, mobile device, appliance etc. |
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| Triple-band |
It means phone understand the American 1900MHz
frequency band as well as the European 900MHz and 1800MHz. |
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