18-08-2012, 03:59 PM
Voice Over IP (VoIP): Internet Telephony
Voice Over IP (VoIP) .ppt (Size: 974 KB / Downloads: 37)
VoIP Definition
Conversion of sound into digital signal
Encapsulation in IP packet
Transport over network
De-encapsulation and reconversion of digital signal into sound
Internet Telephony Vs Traditional Telephony
Traditional telephony uses circuit switching technology while VoIP uses packet switching.
Packet Switching is a much more efficient and cost effective way of sending voice messages.
VoIP Components
IP network
End-point devices such as phones
Servers
For processing IP calls and manage interaction with PBX etc.
Media and VoIP gateways
Phone to Phone Connection
Phone to phone calls are made over the Internet
A special box ATA will connect the phone on network.
Summary
Internet Telephony is a revolutionary technology that has the potential to completely rework the world’s phone systems.
Internet Telephony can turn a standard Internet connection into a way to place free phone calls.