SIP and H.323 - Protocols Working With VoIP

SIP allows people around the world to communicate using their computers and mobile devices over the Internet. It is an important part of Internet Telephony and allows you to harness the benefits of VoIP (voice over IP) and have a rich communication experience. But the most interesting benefit we derive from SIP is the cutting down of...

SIP is used to make calls over the Internet and other IP networks. A SIP address is a unique identifier for each user on the network, just like a phone number identifies each user on the global phone network, or an email address. It is also known as a SIP URI or a SIP profile

What is SIP? The Session Initiation Protocol is complementary with VoIP since it provides signaling functions to it. Apart from VoIP, it is used in other multimedia technologies as well, like online games, video and other services. SIP provides the necessary signaling for creating, modifying and terminating sessions with one or more...

H.323 is the ITU-T protocol for allowing multimedia communication over Packet based systems. It enables voice, video conferencing and data transmission.

Free SIP Providers - Having a free SIP account is a great way of making free calls on the Internet. You only need to choose a SIP provider that gives you a SIP account for free. There are many of these. Here is my list.

Free SIP Softphone Apps - Having a SIP account gives you a lot of freedom to communicate through VoIP. Among the benefits is the ability to make and receive free phone calls to other SIP users worldwide, and to be able to use a softphone software of your choice, without being tied to what one VoIP service provider offers. But which are the best...