Welcome to the world ofVoIP
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 informationover
IP based networks. i.e. Internet
Used to transmit voice, fax, data andmultimedia all in one network
How does VoIP Work?
Sends voice information in discrete digital packetsrather than sending it through the public switchedtelephone network (PSTN).
Takes an analogue voice signal and converts itinto a digital format so that it can be deliveredover an IP network. i.e. Internet.
By using a router-based gateway, a PC-basedgateway, a PBX-based gateway and others it canperform the conversion from an analogue signal toa 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–Today it is out of date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
•Search Function
•Connection
•Digitizing
•Demodulation
•Compression
•Decompression and Remodulation
Advantages
No extra Phone Charge
Allows for multiple connections over asingle 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 by95% 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 noservice fees
Disadvantages
–Sends 15 frames per second
–Actual speed is 33.6Kbps
Products(Beamer TV)
Advantages
–Works with any television (NTSC format) that has aRCA 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!