VoIP Standards and Internet Protocols
Voice over internet protocol (VoIP) uses Internet protocol (IP) to route voice packets over an IP network. The use of VoIP allows voice to be transmitted across any type of IP network. The network can be the Internet, an intranet, or a LAN.
On an IP network, a VoIP signaling protocol is used to create a call, carry data, locate users, and negotiate bandwidth. Below, you will find some of the most widely used VoIP protocols.
VoIP Protocols/Standards
H.323
One of the most widely used VoIP standards, H.323 is used to send voice and video data over an IP network. H.323 is the most popular VoIP standard used by VoIP service providers to transmit voice data. It is especially popular for the transmission of voice data to internation locations.
SIP
SIP is poised to become the building block of future VoIP systems. SIP is a simple text-based VoIP protocol that uses UTF-8 encoding. Using port 5060, SIP can be used with either UDP or TCP. SIP makes communication possible and must be used with other protocols. One of the most popular protocols used with SIP is RTP.
RTP
RTP is a VoIP standard which is used to route real-time data like audio or video over an IP network. While RTP provides the mechanisms required to transfer data over an IP network, it does not guarantee that the data being sent or received will arrive in real-time.
