Quality and security
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I heard that Internet telephony has bad sound quality. True?
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In the early days of the technology (two-three years
ago) the sound quality was inferior to standard telephones, especially
with the first half-duplex PC-based software. With the full-duplex Aplio/PRO
or Aplio/Phone, the most recent algorithms and state-of-the-art compression
technologies have been implemented to ensure the best sound quality
possible.
Aplio/PRO or Aplio/Phone 2.0 include our new PacketPlus™
technology. PacketPlus constantly monitors Internet traffic and adjusts
the size and number of data packets transmitted across the wire. It
gives the user an experience that is very near to true telephone sound
quality.
In addition, Aplio/PRO or Aplio/Phone technology
is dedicated to only one function: Internet Telephony. We don’t
have any additional disk or CPU overhead like a computer does. The result
is a crisper, clearer voice quality, comparable to, or better than,
digital cellular phones.
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What is the quality of the Aplio/PRO or Aplio/Phone?
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The quality is very good, similar to a digital cellular
call or an overseas phone call. The quality is significantly better
than PC-based Internet telephony software. Due to the nature of the
Internet, there is a slight delay between when you talk and the other
party hears you. But the delay with the Aplio/PRO or Aplio/Phone is
substantially less than other Internet telephony products. There is
no static or other noise on the line. It is full-duplex, which means
you can both talk at the same time.
Please note that when using an Aplio/PRO or an Aplio/Phone
to talk with someone using PC-based telephony software, the sound quality
may be limited by the PC software.
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How long is the delay between
when I talk and the other person hears me?
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The delay is about half a second. This is a very
small delay for this class of service and similar to many standard international
calls. It is substantially less than other Internet telephony products.
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Why is the quality better?
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First, our product is a dedicated product –
its only purpose is to make phone calls over the Internet.
Second, we have a dedicated hardware chip which
handles all the voice compression, so the quality is higher than a software
solution that needs to share a mulit-purpose chip with other applications.
We also have a quality-enhancing feature that monitors
traffic on the Internet and automatically optimizes the quality based
on the current Internet traffic.
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Is Internet
Telephony less secure than regular telephony?
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No! Actually, the opposite is true. Spying on a
regular telephone line (tapping) is very easy since the sound signal
is directly available on the wires, without any encoding or security.
Internet telephony uses a sophisticated voice compression algorithm
and sends the voice as packets of data. These packets take an unpredictable
route across the Internet and are reassembled into sound only when they
reach the destination device. Spying on an Internet Telephony conversation
requires very sophisticated equipment and advanced technical abilities.
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How do
Aplio/PRO or Aplio/Phone improve Internet Telephony security?
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Aplio/PRO or Aplio/Phone are digital from one end
to the other. This means that your phone conversation is encoded, compressed
and packetized all the way from your wall jack to the destination wall
jack. Other types of services may not be digital from end to end. For
example, Internet Telephony gateway services use regular analog voice
signals between their servers and the originating and destination telephones.
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