Modem

Modem Modem eksternal 28.8kbps

serial-port modem dari Motorola

28.8kbps's external modem
modem port serial from Motorola

Abbreviated indigenous modem MOdulator
DEModulator. Modulator constitutes
a part one change information signal
into signal bearing (Carrier) and
ready to been sent, meanwhile Demodulator
is sectioned one come to pieces information
signal (one that meaty data or send away for)
of carrier signal (carrier) one
that is accepted so that information
get with every consideration been accepted.
Modem constitutes merging the two,
its mean is modem is communication device two aims.
Each distance communication peripheral
goes away two aim generally utilize a
part the so called "modem", as VSAT,
Microwave is Radio, and other as it,
but by and large more modem terminology
known as Hardware which often been utilized
for communication on computer.

Data of computer that gets to form digital signal
to be given unto modem to be changed as analog signal.
That analog signal gets to be sent over many media telecommunications as telephonical as and radio.

One get in at intent modem,
that analog signal is changed
as digital signal returns and be sent to computer.
Available two modem type physically it,
which is external and internal modem modem.

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Modem type

Modem type

1. 3GP's modem

1. GSM'S modem

Contraction from Modulator and demodulator.

Modem functioninging to inserts signal

information goes to carrier wave;

On the contrary demodulator takes is back signal

information of affiliate signal.

Subdivided modem on:

1. Amplitude Modulation( AM),

which is electronics series that changes

amplitude is carrier wave accords

with amplitude information signal.

2. Frequency Modulation( FM),

which is electronics series that changes

frequency is carrier wave accords

with frequency's change information signal.

3. Pulse Modulation( PM),

which is system pulse modulation can be differentiated as:

a. PAM( Pulse Amplitude Modulation)

arbitrary pulse amplitude of wave

according to information signal change.

b. PPM( Pulse Position Modulation),
which is arbitrary pulse position accords
phasa's angle information signal.

c. PWM( Pulse Width Modulation),
distance among arbitrary pulse
according to bearing signal frequency change.
4. Modulation Is digital, consisting of:
a. FSK( Frequency is keying's Shift),
which is bearing pulse shift accords
with outgrows binary number (analog signal that' dikodekan
1. Analog modem which is modem which change analog signal as digital signal
1. ADSL'S modem
ADSL'S technological modem (Digital Asymetric Subscribe Line)
one that enables to get net surfing wields
alae analog telephone coincide. Its trick is so easy,
to ADSL is given one tool which at conceive of Splitter or line divider.

Splitter's position is placed in front while line rings to come in. Your mean may not ramify modem line
to ADSL with straightforward voice.
Splitter's tool behoof to remove trouble
while are you are utilizing ADSL modem.
With Splitter both gets walking coincide,
where can you answer and call up someones
with ordinary telephone. At your other side makes a abode to get connected
with Internet via ADSL modem
1. Cable modem which is modem which accept direct data
2. of service provider passes TV Cable ... UMTS). Said such,
since passes through HSDPA formed by channel w CDMA a new one,
which is high speed downlink shared channel (HS DSCH)
one that... ... tem WCDMA (wideband CDMA)

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