SIP protocol was made within IETF (Internet Engineering Task Force) – organization occupied with establishing Internet standards and general standards concerning TCP/IP protocols.
Cell Tel Inc.
Cell Tel Inc. is a leader in mobile communications. Headquartered in Brooklyn, New York, Cell Tel offers easy-to-use and inexpensive wireless technology for individual, family and company use. Using satellite, fiber optic, and Cell Tel`s own patented netw
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