1. Voice over
Internet Protocol
Emmanuel Robles Hernández 758457
Jesús Uriel Soto Flores 755267
Sergio Iván Benítez Valdez 749978
“VoIP is not just a service, it’s a technology.”

2. What is VoIP?
• A Voice over IP (VoIP) system
allows customers to send and
receive calls over a digital
network.
• If you are calling a regular phone
number, the signal is converted to
a regular telephone signal before
it reaches the destination. VoIP
can allow you to make a call
directly from a computer, a
special VoIP phone, or a
traditional phone connected to a
special adapter.

3. Brief History
• There are 3 fundamental technologies that are necessary
for the existence of Voice over IP.
▫ The Telephone
▫ The Internet
▫ Transmission Control Protocol / Internet Protocol
(TCP/IP)
• VoIP started in February of 1995 by a small company in
Israel called Vocaltec, Inc.
• It was the first commercial Internet phone software.
• Their product, InternetPhone, allowed one user to call
another user via their computers, a microphone and a set
of speakers.

4. Brief History
• By the end of 1998 VoIP calls had yet to total 1%
of all voice calls.
• By 2000, VoIP calls accounted for 3% and by
2003 that number had jumped up to 25%.

5. How does VoIP work?
• Analog calls are converted into packets of data. The
packets travel like any other type of data (like e-mail)
over the public internet and/or privete IP networks.
• Using VoIP, you can call landline or cell phones. You can
also call computer-to-computer (using a microphone or
headsets).
• You have to ensure the best voice quality and security
(have a private IP network) in the case that you use VoIP
as a landline telephone (you also need an analog
adapter).

6. Advantages
• VoIP calls are free from users who have the same
access or program.
• It has a lower cost than other system calling
services (localy speaking).
• Offers features and services that are not
available for traditional phones.

7. Disadvantages
• Not all VoIP connect to emergency services.
• VoIP makes it difficult to locate network users
geographically.
• Exposed to hacking (record coversations, break
into voice mailboxes, etc.)

8. Examples
• Skype
• Google Talk
• Viber
• VoIP Buster

9. References
• https://docs.google.com/viewer?a=v&q=cache:rF_79j5vGTIJ:www.joehall
ock.com/edu/pdfs/Hallock_J_VoIP_Past.pdf+History+VoIP&hl=es&gl=m
x&pid=bl&srcid=ADGEEShtWqgR31kXdDv2meFLrcVRD9zLYrkBI5M4Pi1
UQaL2toCgvjnX45dzioW5M5fOk74nfWjuaYVNmpXBWv1n_1TRLaCIuykz
q5g-r-
jojOnFpb0tPc7efGKqIBl7WIaxvRvVDJXJ&sig=AHIEtbSKySfU_vRe8NGSa
1SxuahyNIRowA
• http://www.monografias.com/trabajos3/voip/voip.shtml
• http://transition.fcc.gov/voip/
• http://en.wikipedia.org/wiki/Voice_over_IP#Protocols
• http://www.mspmentor.net/2010/01/15/chartec-dials-up-voip-for-
managed-service-providers/