OmniMetrix provides remote monitoring and control solutions utilizing a variety of wireless data transport channels.  They include:

GSM:  GSM boasts the largest voice and digital coverage in America. Omnimetrix systems use a packet-base platform on GSM networks to deliver outstanding data collection performance.
Click Here For Cingular/GSM Coverage

Nextel: Nextel uses a packet-based platform, the integrated Digital Enhanced Network (iDEN) technology, developed by Motorola. This all-digital technology provides exceptional sound and transmission quality, using state-of-the-art methods to deliver unparalleled Nextel services.
Click Here For Nextel Coverage

GLOBALWAVE:  The GLOBALWAVE satellite channel utilizes geosynchronous satellites to provide bidirectional data flow to a very large geographic area.  The North American footprint is continental in scale, with coverage throughout the Caribbean and 200 miles offshore in the Atlantic and Pacific.  There are other satellites for other continents.  Contact OmniMetrix for more information outside the US.

Iridium:  The Iridium constellation provides real-time connectivity to any spot on the globe.  It requires absolutely no antenna pointing thanks to its omni directional antenna.  This makes installation simple for engine techs who do not have electronics experience.  The Iridium system also covers all of the world's oceans, making it ideal for offshore drilling locations and commercial work boats. 

VSAT:  The VSAT solution delivers high bandwidth connectivity with global coverage options.  In applications where a remote internet connection is needed for high performance, reliability and security, this system is unmatched.  This system can even deliver Voice Over Internet Protocol (VOIP), allowing telephone service at the remote location via the high bandwidth connection.