VoIP
Explanation: The Voice over Internet Protocol (VoIP) is used for routing of voice conversation over the Internet.
The VoIP is also known by other names such as IP Telephony, Broadband Telephony, etc. Analog signals are
used in telephones in which the sound is received as electrical pulsation, which is amplified and then carried to
a small loudspeaker attached to the other phone, and the call receiver can hear the sound. In VoIP, analog
signals are changed into digital signals, which are transmitted on the Internet. VoIP is used to make free phone
calls using an Internet connection, and this can be done by using any VoIP software available in the market.
There are various modes for making phone calls through the Internet. Some of the important modes are as
follows:
Through Analog Telephone Adapter (ATA)
In this mode, the traditional phone is attached to the computer through AT
A. ATA receives analog signals from the phone and then converts these signals to digital signals. The digital
signals are then received by the Internet Service Providers (ISP), and the system is ready to make calls over
VoIP.
Through IP Phone
IP Phones look exactly like the traditional phones, but they differ in that they have RJ-45 Ethernet connectors,
instead of RJ-11 phone connectors, for connecting to the computers.
Computer To Computer
This is the easiest way to use VoIP. For this, we need software, microphone, speakers, sound card and an
Internet connection through a cable or a DSL modem.
Soft Phones
Soft phone is a software application that can be loaded onto a computer and used anywhere in the broadband
connectivity area.