Voice overInternet 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.”
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.
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.
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%.
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).
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.
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.)
Examples• Skype• Google Talk• Viber• VoIP Buster