Automatic Answer
: Automatic answer is a phone feature that
allows a recipient to answer a call without the need to press any
keys. Once the phone has started to ring the conversation can be
started immediately, because the sound of the recipient's voice
speaking into the phone's microphone will trigger the answering of
the call |
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Automatic Backlight
: Automatic backlighting means that touching any
key will illuminate the display and keypad for ease of viewing. The
backlight will turn itself off automatically after a preset period,
so avoiding excessive drain on the battery. This feature will only
be available on mobile phones that have a backlight |
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Automatic Redial
: Automatic redial is a feature designed to make
it easier to dial numbers that are engaged. After the dialled
number is found to be engaged, the phone will either repeatedly
redial the number automatically, or it can be set to redial by
pressing the appropriate key. This feature saves the user from
dialling the number many times until a ringing tone can be
obtained. Automatic redial will usually operate for a set number of
redials before giving up, to avoid the negative consequences of
battery drain, blocking the phone, and causing unnecessary network
traffic |
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AVI
: audio video interleave |
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Band
: content Band Go back to BackboneSkip content
Also known as: Frequency Band Band (Frequency Band) is a term used
in telecommunications to refer to a range of frequencies authorised
for specific purposes. Each band will be a continuous spectrum of
frequencies, with upper and lower limits, and international use of
these bands is regulated by the International Telecommunication
Union (ITU) to prevent interference. For example, the medium wave
band is approved for several purposes, the most well-known being
its use for public service AM (Amplitude Modulation) radio
broadcasts |
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Bandwidth
: Bandwidth is a measure of the information
carrying capacity of a communications channel, whether it be of the
wired or wireless type. In analogue systems bandwidth is measured
as a frequency in Hertz (Hz), and it is calculated as the
difference between the highest and lowest frequencies of a band.
The term bandwidth can apply to various types of equipment, e.g.
audio, radio, video, etc., and in each case the bandwidth is
calculated by subtracting the lower frequency limit of the band
from its upper frequency limit. The range of frequencies that a
particular signal will occupy can also be referred to as its
bandwidth (as all signals inherently occupy a certain amount of
bandwidth), or alternatively it may mean the range of frequencies
that a piece of equipment will respond to. Furthermore, because the
rate at which digital data flows through a system will depend on
the bandwidth, this data rate can also be shown to be a measure of
the system's bandwidth. In digital systems the bandwidth is usually
described as the maximum transmission speed that a channel will
support, and is measured as a data rate in bits per second (bps).
If the bandwidth of a system is too narrow for a particular signal
to pass through it, then there will be some distortion to that
signal, or loss of its information content. Because bandwidth is
closely related to the signal frequencies being transmitted, it
gives an indication of the capacity of the system to cope with
different signals. This means that a wide bandwidth will allow
higher data rates, and conversely a narrow bandwidth will restrict
the data rate. A voice signal requires only about a 3 kHz
bandwidth, whereas a TV video signal needs about 6 MHz of
bandwidth, because it contains much more information. Signals
outside the band of interest are usually suppressed, in order to
prevent interference to or from other equipment. Bandwidth has a
general meaning of how much information can be carried in a given
time period (usually a second). For example, a broadband link (i.e.
one with a wide bandwidth) may be able to carry enough information
to present moving video images. If one link or piece of equipment
in a communication network has a much smaller bandwidth than the
rest, then this will determine the data rate for the whole
system |
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Base Station
: Also known as: BS Base Station (BS) is a fixed
radio station in the cellular network, which communicates with
mobile telephones using radio waves. The Base Station will include
transmitters, receivers, tower and antenna, and control equipment
to interconnect with other base stations and the public switched
network via landline or microwave links. A mobile telephone service
consists of a network of many Base Stations, each of which covers
one cell or geographical area within a total cellular service area.
The Base Station communicates with the mobile phones within its
given cell, and then transfers calls to other base stations and the
fixed telephone network |
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Base Station Colour Code
: Also known as: BCC Base Station Colour Code
(BCC) is the code transmitted in the SB (Synchronisation Burst) of
GSM systems. The BCC is used by the MS (Mobile Station) to
distinguish between cells using the same frequencies, when the MS
is deciding on which cell to select and to lock-on to. The BCC is
also important during the receiving of the BCCH (Broadcast Control
Channel), to identify the TSC (Training Sequence Code) to be
used |
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Base Station Identity Code
: Also known as: BSIC Base Station Identity Code
(BSIC) is a 6 bit 'colour code' broadcast on the SCH
(Synchronisation Channel) in GSM systems, which uniquely identifies
the beacon frequency. The BSIC is broadcasted in order to identify
the NCC (Network Colour Code) and the BCC (Base Station Colour
Code) to the Mobile Stations in the area. Adjacent cells in the
cellular system will have different 'colours' or BSICs |
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Base Station Subsystem
: Also known as: BSS Base Station Subsystem /
System (BSS) refers to a segment of a GSM system, comprising a Base
Station Controller (BSC) and the one or more Base Transceiver
Stations (BTS) that are associated with it. The Base Station
Controller manages the Base Transceiver Stations, and at a higher
level a Mobile Switching Centre (MSC) controls one or more of these
Base Station Subsystems. The BSS is the interface between the
Mobile Station (MS) and the Mobile Switching Centre (MSC). |
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Base Tranceiver Station
: Also known as: BTS Base Transceiver Station
(BTS) is a fixed radio station in the cellular network, which
communicates with mobile telephones using radio waves. The Base
Transceiver Station will include transmitters, receivers, tower and
antenna, and control equipment to interconnect with other base
transceiver stations and the public switched network via landline
or microwave links. A mobile telephone service consists of a
network of many Base Transceiver Stations, each of which covers one
cell or geographical area within a total cellular service area. The
Base Transceiver Station communicates with the mobile phones within
its given cell, and then transfers calls to other base transceiver
stations and the fixed telephone network. A BTS may also be called
a Base Station (BS). |
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Battery
: Also known as: Power Cell Battery is the
normal power source used to operate a mobile phone. The battery
capacity is usually measured in units of mAh (milliamps x hours),
which is the electric current output that the battery can produce
over a specified time. The higher the mAh rating of the battery the
longer it will be able to power the phone. Mobile phone batteries
are often available in "standard" or "extended" versions, the
latter having a larger capacity to power the phone for a longer
period of time. Several types of battery have been used in mobile
phones, the main types being: Nickel Cadmium (NiCd), Nickel Metal
Hydride (NiMH), Lithium Ion (Li-Ion) and Lithium Polymer (Li-Po).
NiCd and NiMH (to a lesser degree) suffer from memory effect. All
batteries slowly lose their charge with time, even when unused. The
rate at which batteries self-discharge will depend on their type,
and it is found that an unused Li-Ion battery is the best at
holding its charge, a NiMH battery the worst, and NiCd is somewhere
in between |
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Battery Indicator
: Battery indicator is either a visual or
audible warning message that alert the user to the state of the
battery. The phone may give out an audible "beeping" tone, or a
"LoBat" message might appear on the display to indicate that the
battery is running low. The warnings usually give the user
sufficient time to recharge the battery before the phone stops
working |
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Battery Meter
: Battery meter is a visual indicator of the
estimated amount of life remaining in the battery. Mobile phones
usually combine a meter with an audible warning signal, to help the
user to avoid dropping calls due to the battery running low before
they have the chance to recharge |
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Baud
: Also known as: Bd Baud (Bd) was the
traditional unit used to measure signalling speed or modulation
rate on a communications channel, and it was first used to measure
the speed of telegraph transmissions. The Baud was named after a
French engineer, Jean-Maurice-Emile Baudot, and one Baud is equal
to one signal change per second. Baud is often confused with the
bit rate or Bits per Second (bps), and the two terms are sometimes
used interchangeably. However, Bauds and bits are not always the
same thing, as more than one bit may be transferred in one Baud.
Nowadays Bits Per Second (bps) is used instead of Baud, because it
is a more accurate measurement of the actual data transfer rate,
and the Baud is best avoided |
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Baud Rate
: Baud Rate is a measure of the information
carrying capacity or signalling rate on a communications channel,
and is the maximum number of discrete signal events that can be
transmitted per second. Baud Rate has often been used as a measure
of the speed at which computers can transfer data through a modem.
However, it is a term that has caused a lot of confusion, and some
people have mistakenly used the term interchangeably with Bits per
Second (bps). Bauds and bits are not always the same thing, as more
than one bit may be transferred in one Baud. Nowadays Bits Per
Second (bps) is used instead of Baud, because it is a more accurate
measurement of the actual data transfer rate, and the Baud is best
avoided |
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BCCH
: Also known as: Broadcast Control Channel
Broadcast Control Channel (BCCH) is a downlink GSM Broadcast
Channel (BCH). The BCCH is transmitted by a Base Transceiver
Station (BTS) to provide the signalling information required by the
MS (Mobile Station) to access and identify the network. The BCCH
will include information such as the LAC (Location Area
Code). |
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BCH
: Also known as: Broadcast Channel Broadcast
Channels (BCH) are downlink channels in a GSM system and are
transmitted by the Base Transceiver Station (BTS). BCH provide
signalling information, so that the Mobile Stations (MS) in the
cell can locate, synchronise and access the network. Three types of
BCH are used: Broadcast Control Channel (BCCH), Synchronisation
Channel (SCH), and Frequency Correction Channel |
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Behavior
: "A behavior" is a reusable block of computer
code or script that, when applied to an object (computer
science,) especially a graphical one, causes it to respond to
user input in meaningful patterns or to operate independently, as
if alive.
http://en.wikipedia.org/wiki/Behaviour
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benefit
: n. advantage of a product or service, usually
derived from its features |
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