This document discusses VoIP (Voice over Internet Protocol) technologies. It begins by defining VoIP and how it allows phone calls to be made over the internet instead of traditional telephone networks. It then explores enterprise VoIP systems, hosted VoIP, VoIP phones, and the differences between circuit switching used in PSTN networks and packet switching used in VoIP. Challenges of VoIP like latency, jitter and packet loss are outlined, as well as advantages such as lower costs, flexibility and portability. Popular VoIP service providers like Google Voice and Skype are compared.

1. VoIP Final Project

2. VOIP
• What is VoIP?
• Ways of using VoIP?
• What is PSTN?
• What are the Challanges?
• Advantages of the VoIP usage?
• VoIP prices?
• VoIP in Turkey and legal issues?
• What is Packet switching
• What is circuit switching
• What is business VoIP?
• What is enterprise VoIP?
• What is VoIP phone?
• What is Internet telephony?
• What is hosted VoIP?
• Difference between PSTN and VOIP

3. What is VoIP?
• Voice-over-Internet protocol (VoIP) is a
methodology and group of technologies
for the delivery of voice communications
and multimedia sessions over Internet
Protocol (IP) networks.
• VoIP allows you to make telephone calls
• using a computer network, over a data
network like the Internet
• VoIP uses the internet as its medium
to send voice.
• • For our purposes we will restrict it
to mean voice communications
among 2 or more computers.

4. What is Enterprise VoIP ?
Enterprise VoIP Results
• branch exchange (PBX) capabilities
• conference calling
• desk-to-desk calling
• music on hold and automated
attendants

5. Enterprise VOIP continued..
Enterprise VoIP Results
• offer an additional level of security
• such as IPsec encryption
• Voice over Secure IP (VoSIP)
• Secure Voice over IP (SVoIP)
• Secure Voice over Secure IP (SVoSIP) to
help protect confidential VoIP
communications.

6. What is VOIP Host ?
• A form of business VoIP services where the VoIP equipment, servers and
services are hosted by the VoIP provider, which manages calls and routes
them to and from the subscriber's existing telephony system and
equipment. Hosted VoIP is also frequently referred to as managed VoIP and
can save companies from the potentially expensive costs of having to
invest in VoIP equipment and manage the system.

7. Voip telephony
• VoIP phones utilize packet-switched
Voice over Internet Protocol (VoIP), or
Internet telephony, to transmit telephone
calls over the Internet as opposed to the
circuit-switched telephony used by the
traditional Public Switched Telephone
Network (PSTN). The advantage to VoIP
phone calls is that unlike regular long-
distance calls, phone calls made through a
VoIP phone service are free – there are no
fees beyond the cost of your Internet
access.

8. What is Analog telephone adapter (ATA) ?
• An analog telephony adapter or analog
telephone adapter (ATA) is a device used
to connect one or more standard analog
telephones to a digital telephone system
(such as voice over IP) or a non-standard
telephone system.

9. The Difference Between VoIP
and PSTN Systems
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10. What is PSTN ?
• The Public Switched Telephone
Network (PSTN), also known as Plain
Old Telephone Service (POTS), is the
wired phone system over which
landline telephone calls are made.
The PSTN relies on circuit switching.
To connect one phone to another, the
phone call is routed through
numerous switches operating on a
local, regional, national or
international level. The connection
established between the two phones is
called a circuit

11. Circuit switching
• Circuit switching is a methodology of implementing a telecommunications
network in which two network nodes establish a dedicated
communications channel (circuit) through the network before the nodes
may communicate.
• The circuit guarantees the full bandwidth of the channel and remains
connected for the duration of the communication session.

12. Packet Switching
• Packet switching which divides the data to be transmitted into
packets transmitted through the network independently.
• Each packet is then transmitted individually and can even follow
different routes to its destination. Once all the packets forming a
message arrive at the destination, they are recompiled into the
original message.

13. PSTN vs. VoIP: Feature-by-feature comparison(1)
VOIP
• Internet connectivity
• Free VoIP-to-VoIP calling (local and
international), but calls to mobile and
landline phones have nominal
subscription fees of around 1.2 cents
to 2.6 cents a minute.
• Upgrades usually require more
bandwidth and simple software
updates.
PSTN
• Dedicated telephone lines
• No free calls can be made. Costly
international calling. Monthly phone
plans usually cost around $25 to $30
per month depending on service
provider.
• Upgrades require purchasing more
hardware and dedicated lines, which
can be very complex and costly.

14. PSTN vs. VoIP: Feature-by-feature comparison(2)
VOIP
• This feature is typically standard
• Most VoIP options offer free call
waiting, such as Google Voice and
Skype
• Some VoIP options provide free call
forwarding (Google Voice), while
others offer it for an extra fee or
through a subscription (Skype).
PSTN
• This feature typically requires
dedicated lines for each extension
and is very pricey.
• Available at extra cost
• Available at extra cost

15. PSTN vs. VoIP: Feature-by-feature comparison(3)
VOIP
• Some VoIP options provide free call
transferring (Google Voice), while
others do not support call transferring
at all (Skype).
• Depends on the service, but
emergency calling is usually not
provided by VoIP or is very limited
(Skype). 911 calls are also typically
untraceable.
PSTN
• Available at extra cost
• Emergency calling is enabled, and
services are traceable to location.

16. VOIP SERVICES
PROVIDER
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17. Supporting content
Item
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18. GOOGLE VOICE VS. SKYPE

19. GOOGLE VOICE VS. SKYPE

20. GOOGLE VOICE VS. SKYPE

21. GOOGLE VOICE VS. SKYPE

22. GOOGLE VOICE VS. SKYPE

23. CHALLANGES &
ADVANTAGES OF VOIP
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24. VoIP Challenges
• Packet loss
• Latency
• Jitter
• Echo
• Reliability
• Firewalls

25. VoIP Challenges
• VoIP implementations face problems dealing with latency , echo
and jitter
• Echo: waving of voice
• Latency: Changing in delivery time between voice packets
• Jitter: Changing in delivery order of voice packets

26. VoIP Challenges
• Connection Problems:
• Echo and jitter occurs because of packet loss.
• Internet stability problems can cause reliability problems and this
discourages voip usage.
• routing VoIP traffic through firewalls blocks voice packets
transmission.

27. Advantages of VoIP
• What are the esssential factors that encourages people to use
VoIP?
• Cost of equipment and deployement
• Low price in leased-line(home phone)
• Portability
• Flexibility
• Versatility
• Interconnectivity

28. Advantages of VoIP Continued..
• Integrated Messaging: integrates Voice Mail with E-Mai

29. Project Summary
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30. Conclusion
Voice over Internet Protocol (VoIP) phones is the wave of the future. As technology
improves, VoIP phone systems will continue to thrive as a more efficient, cost
effective way to terminate phone calls. There are loads of benefits for using VoIP.
One of the main benefits is the cost efficiency.
Nowadays VoIP technology is generally used in all offices for making long distance
voice calls with real time voice quality at low charges. So, VoIP technology will be
the best source for long distance communication up to date. It is more useful for
business use too. Using a VoIP phone system will make business sound more
professional.
VoIP technology will be the trend of future. Already, more than 50 million people
and businesses have begun to subscribe to a VoIP phone provider

31. Refernces