Session Initiation Protocol (SIP) is being used by VoIP to convert voice to data and transmit this data over public or private IP networks. VoIP is used to cut costs, add features and capabilities, and make more efficient use of their IP networks. In this article, the author writes about some methods by which the process is better. Read more at: http://it.toolbox.com/blogs/voip-news/5-ways-you-can-successfully-implement-sip-70186