What Is How Does It Work; What Is Voip What Is The Advantages Using Voip Rather Pstn - Atlantis Land A02-RAV260-W54 User Manual

What is How does it work?

Question
What is How does it
work?
What is VoIP What is the advantages using VoIP
rather PSTN?
Question
What is
advantages
VoIP rather PSTN?
Answer
Many years ago we discovered that sending a signal to
a remote destination could have be done also in a digital
fashion: before sending it we have to digitalize it with an
ADC (analog to digital converter), transmit it, and at the
end transform it again in analog format with DAC (digital
to analog converter) to use it.
VoIP works like that, digitalizing voice in data packets,
sending them and reconverting them in voice at
destination.
Digital format can be better controlled: we can compress
it, route it, convert it to a new better format, and so on;
also we saw that digital signal is more noise tolerant
than the analog one (see GSM vs TACS).
TCP/IP networks are made of IP packets containing a
header (to control communication) and a payload to
transport data: VoIP use it to go across the network and
come to destination.
Voice (source) -- ADC ---- Internet --- DAC -- Voice
(dest)
Answer
the When you are using PSTN line, you typically pay for
using time used to a PSTN line manager company: more time
you stay at phone and more you'll pay. In addition you
couldn't talk with other that one person at a time.
In opposite with VoIP mechanism you can talk all the
time with every person you want (the needed is that
other person is also connected to Internet at the same
time), as far as you want (money independent) and, in
addition, you can talk with many people at the same
time.
If you're still not persuaded you can consider that, at the
same time, you can exchange data with people are you
talking with, sending images, graphs and videos.
VoIPMaster 260W
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