Transcript Welcome to the world of VoIP (Voice Over IP)

Welcome to the world of
VoIP
By: Jaime Valles
& Shady Mickhail
Our Presentation
 Overview of VoIP
 How does VoIP work
 Detailed Explanation
 Advantages and Disadvantages
 Types of Implementation
 Products
 Summary
Overview (What is VoIP?)
 Voice over Internet Protocol
 Involves the delivery of voice information
over
 IP based networks. i.e. Internet
 Used to transmit voice, fax, data and
multimedia all in one network
How does VoIP Work?
 Sends voice information in discrete digital packets
rather than sending it through the public switched
telephone network (PSTN).
 Takes an analogue voice signal and converts it into
a digital format so that it can be delivered over an
IP network. i.e. Internet.
 By using a router-based gateway, a PC-based
gateway, a PBX-based gateway and others it can
perform the conversion from an analogue signal to
a digital format.
Detailed Explanation
 PSTN (Public Switched Telephone Network)
– POTS based on Circuit Switching
– Today it is out of date
– ISP’s pay for long distance access
 VoIP takes advantage of this
Detailed Explanation
 IP telephony
– Packet switching using H.323 Standard
– Bypass the PSTN through a Gateway
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Search Function
Connection
Digitizing
Demodulation
Compression
Decompression and Remodulation
Advantages
 No extra Phone Charge
 Allows for multiple connections over a
single line ex. Voice, fax, data, video.
 Multiple users at the same time
Disadvantages
 Initial set up cost
 Quality issues
 Compatibility issues
Types of Implementation
 PC to Phone Service
– Dialpad.com
 PC to PC Service
– NetMeeting
 Phone to Phone Service
– Telephone companies are able to reduce cost by
95% ex. Japan 29cents/min
 Network Service
Products (Beamer)
 Advantages
– Enables you to instantly add video to you phone calls,
simply by using your existing phone, and phone line.
– No software to install, computer not required and no
service fees
 Disadvantages
– Sends 15 frames per second
– Actual speed is 33.6Kbps
Products
(Beamer TV)
 Advantages
– Works with any television (NTSC format) that has a
RCA video jack. Also, easy to set up and easy to use
 Disadvantages
– Modem transmission speed is 33.6Kpbs.
– 4 to15 frames per second
– Retail Value for both products $149.99
 http://www.vialta.com/
Summary
 Positive Outlook
 Concerns
– Security
– Bandwidth management
 Advanced Technologies
Thank You!