Stephen Nelson

XCast Labs, Inc. provides software and hardware solutions. It offers hosted IP-PBX solution, SIP trunking solution, video solution, VoIP mobile and WIFI, phones and devices, and carrier and wholesale services. The company was founded by Patricia Mathis, Vladimir Smelyansky, Roman Marchevsky, Gregory O Welch and Cliff Rees in 2002 and is headquartered in Los Angeles, CA.

Level 3GC Ltd. operates as a global communications service provider. It offers data, voice and collaboration services to the companies in the Fortune 500, as well as carriers, mobile operators and Internet service providers around the world. The company offers telecommunication solutions, including broadband, voice, data, multimedia communications, readily accessible audio, video and web-conferencing. It serves Latin American businesses through its operations in Argentina, Brazil, Chile, Colombia, Ecuador, Panama, Peru, Mexico, Venezuela, the United States and the Caribbean region. The company was founded in March 1997 and is headquartered in Hamilton, Bermuda.

AT & T is the global leader in providing local, long distance, Internet, and transaction-based voice and data services. AT&T provides unparalleled quality and reliability in communications services

Winstar LLC used to offers fixed wireless and broadband communications services including voice, video, data and Internet to government customers. The company used fixed wireless technology that bypasses traditional local phone companies to provide voice and data transport services to enterprise customers. It was headquartered in Newark, NJ.