PC to PC Internet Telephone Call

This part will explain the simplest VoIP call technique using a computer to call another computer or VoIP network. All you need is a computer with a sound card, headset, microphone and internet connectivity. How much these equipments will cost depend on the specification you use. But sinceVoIP for personal use does not require sophisticated equipment, these equipments will not cost much. Of these requirements, bandwidth is perhaps the most important, as it determines how good the voice quality of your VoIP communication.

What Is Internet Telephony ?

In a simple definition, Voice over Internet Protocol (VoIP) or internet telephony is a telephone network over the internet (TCP/IP) network. Thus, you could use VoIP anywhere as long as you are connected to the internet.

There are two main internet telephony technology, i.e., H.323 and Session Initiation Protocol (SIP) that are frequently used. The former is an older standard developed by the International Telecommunication Union

How VoIP Works for Dummies ??

The heart of VoIP network is the softswitch. It stores all information on the subscribers. In a simple view, a VoIP softswitch basically has a table mapping the phone number of the subscriber and the computer or IP address of the subscriber.

Everytime, a subscriber wants to make a call to another subscriber. The client equipment will ask the softswitch the destination address of the other subscriber. The destination address can be an IP address. Thus, the