11. G. Jayaprakash Reddy
Project
Title : Voice over Internet
protocol implementation
VoIP
definition
A vibrant present sets the stage for a glorious future.
The traditional phone systems and cellular systems are
slowly increasing their reach in the market. In the
modernized countries there is saturation in the number
of connections and the number of connections is growing
in the developing countries.
A telephone is now an essential means
of communication and the mobile revolution is carrying
the concept of communication to greater vistas. Internet
revolution has carried through the concept of information
explosion and is now being promoted as replacement for
the Traditional telephone system VoIP stands for Voice
over Internet Protocol. It is also referred to as IP
Telephony. It is another way of making phone calls,
though the ‘phone’ part is not always present
anymore, as you can communicate without a telephone
set.
There are basically three ways of
usinq VoIP: one is to have a PC on both communicating
sides; another is to have a Phone on one side and a
PC on the other and the third is to have two phones.
VolP enables people to use the Internet
as the transmission medium for having voice, data and
video sessions. Real Time data is sent in packets using
rather than by traditional POTS circuits.
The great thing about VolP is that
it taps additional value from the already existing infrastructure
without additional costs. VolP transmits the sounds
you make over the standard Internet infrastructure,
using the IP Protocol. This is how you can communicate
without paying for more than your monthly Internet bill.
Current scenario
PSTN features that traditional phone
companies usually charge extra for: Caller 10, Call
Waiting, Voice Mail, and Call Forwarding. However, the
implementation of Call Forwarding and Voice Mail is
far superior in traditional phones.
Call forwardinq
In PSTN Call Forwarding can be done
throu'gh a web interface from anywhere. We have to use
my desktop phone physically to activate or deactivate
its Call Forwarding or to change the number that we
are forwarding to. With legacy PBX systems, a call requires
the setting up of a dedicated circuit for the duration
of a call. This is a huge limitation.
Locate me
If you're going to be away from your
service phone, set your Locate Me feature to find you
anywhere and everywhere. You can choose several phone
numbers where you want to be reached and have the service
ring them one at a time in sequence, or all at once.
Any Locate Me calls forwarded to
long distance or international numbers will count against
your plan. So for example, if a friend calls you from
a number down the street, and you have Locate Me forwarded
to an international location, your friend will be billed
for a local call according to her calling plan, and
you will be billed for the forwarded international call
at the per-rate charge for that international location.
Similarly, if you are not signed up for an unlimited
nationwide calling plan and use Locate Me to forward
calls to long distance or local toll numbers from your
AT&T Call Vantage service phone, you may be charged
per-minute rates for the duration of the forwarded call.
Do not disturb
What benefits does VolP offer?
There are many benefits. Customers
often see significant cost savings of 30%-90% using
a VolP service. Additional VolP benefits include:
• Ability to be mobile (Take your phone anywhere
in the world)
• Voice Mail, Caller 10, Call Conferencing, Call
Forwarding, Fax
• Unlimited in-country long distance and often
to other countries
• Check voice mail via email or online
• Add multiple inbound area codes to create a
'virtual presence' in other cities or provide a local
number to friends and family
• Value added features like integration with other
PC software
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