Offering: IT services, Internet services, web services in India, Uttar Pradesh

SIP is an open protocol for communications that allows users to connect to a server and use the services. It supports a range of transport protocols like TCP, SCTP and UDP. It can initiate multimedia sessions and allow the users to transfer not only voice messages but also chats and videos. SIP enabled VoIP iPhone is fast replacing the traditional phone systems. http://www.voipinfotech.com/iphone-sip-client.html

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