VoIP

What is VoIP?
Source: http://communication.howstuffworks.com/ip-telephony.htm
Voice over internet protocol is the method for taking analog audio signal turning them into digital data that can be transmitted over the Internet. VoIP can turn a standard Internet connection into a way to place free phone calls.
Three different VoIP in common use:
1. ATA(analog telephone adaptor)
-most straightforward and is frequently used.
-connect a standard phone to your computer or your Internet connection for use with VoIP.
- An analog-to-digital converter.
Analog signal ( from traditional phone)à digital data (for transmission over the Internet.)
2. IP Phones
-- specialized phones (with a handset, cradle and buttons)
-- have an RJ-45 Ethernet connector. IP phones connect directly
3. Computer-to-computer
Needs:
a) software,
b) microphone
c) speakers
d) sound card
e) an Internet connection
all of the current circuit-switched networks will be replaced with packet-switching technology
Features of VoIP that is in VoIP
· Caller ID
· Call waiting
· Call transfer
· Repeat dial
· Return call
· Three-way calling

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