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Glossary
FDD
Frequency Division Duplex. Full duplex operation by using a pair
of frequencies, one for transmission and one for reception.
FEC
Forward Error Correction. A method of communicating data that
can corrects errors in transmission on the receiving end. Prior to
transmission, the data is put through a predetermined algorithm
that adds extra bits specifically for error correction to any
character or code block. If the transmission is received in error,
the correction bits are used to check and repair the data.
FFT
Fast Fourier Transform. A
the time domain to the frequency domain; often used in signal
processing.
FTP
File Transfer Protocol. A protocol for exchanging files over the
Internet. FTP uses the Internet's TCP/IP protocols to enable data
transfer.
G.711
A 64 Kbps PCM voice-coding technique. Described in the ITU-T
standard in its G-series recommendations.
G.723.1
A compression technique that can be sed for compressing
speech or audio signal components
of the H.324 family of standards. This codec has two bit rates
associated with it: 5.3 and 6.3 Kbps. The higher bit rate provides
a somewhat higher quality of sound. The lower bit rate
system designe
T standard in its G-series recommendations.
G.729
A compression technique where voice is coded into 8 Kbps
streams. There are two variations of this standard (G.729 and
G.729 Annex A) that differ mainly in computational complexity;
both provide speech quality similar to 32-kbps ADPCM.
Described in the ITU-T standard in its G-series
recommendat
GPS
Global Positioning System. A system that uses satellites,
receivers and software to allow users to determine their precise
geographic position.
H.323
A protocol suite def
internet (Voice over IP or VoIP). In addition to voice applications,
H.323 provides mechanisms for video communication and data
collaboration, in combination with the ITU-T T.120 series
standards.
IB
In-Band
IDU
Indoor Unit
IV
n algorithm for converting data from
rs with additional flexibility. Described in the ITU-
ions.
ined by ITU-T for voice transmission over
u
at a very low bit rate as part
provides
BreezeMAX System Manual
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