Transcript VOIP

By Will Peeden
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Voice over Internet Protocol
A way to make phone calls over the
internet.
A way to bypass the standard phone
company and their charges.
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Traditional analog signals are
converted to digital and sent through
the internet to a VoIP service provider.
VoIP uses the packet-switching
method to transfer the data which is
much more efficient than circuit
switching.
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Connect your regular phone to an
ATA (analog telephone adapter).
Install software on your computer
that will let you make calls with your
microphone and speakers.
Use a VoIP phone that is basically a
telephone with an ATA built in.
Typical Analog Telephone Adapter
VoIP is much cheaper than traditional
land lines.
 No extra charges for long distance
calls.
 Anywhere you can connect to the
internet you can make and receive
phone calls.
 VoIP can integrate with other internet
applications such as video
conversation.
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If your power goes out, so does your
VoIP service.
 Some VoIP service providers don’t
offer 911 emergency because it’s hard
to determine which 911 center to
route a call.
 Errors with your internet connection
will adversely affect phone calls.
 VoIP is susceptible to worms, viruses
and hacking.
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Over 90% of VoIP providers use a
public known codex and a publicly
known protocol to transport voice
conversations.
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VoIP service should compress your
voice into encryption packets to travel
across the internet, and return back to
voice at its destination.
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Packets can be lost during
transmission, resulting in your voice
being fragmented.
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Delayed packets can cause your voice
to be jittery or echoed.
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Any types of “hiccups” in your
connection will reduce quality.
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Features like caller id, call waiting, and
call forwarding are usually included in
packages.
Voicemail, e-mail alerts to new
voicemail, and web access to voicemail.
Online management of your account,
features, settings, etc.
Computer Dialing
The H.323 protocol is currently the most
widely used.
 The ITU recommends H.323 because it
provides audio-visual communication
sessions on any packet network.
 There are other protocols as well, which
can cause problems if two different
protocols try to communicate.
 Uses soft switches to find the correct IP
address to route calls.
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