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Sage Instruments makes field test sets, automated wireless test systems, and various other test components and systems for the telecommunications and wireless test industry.Sage Instruments company specializes in VoIP (Voice over Internet Protocol) testing, a burgeoning area in communications test, as more telecommunications occur over Internet protocol networks, rather than the copper-wiring infrastructure of AT&T, Deutsche Telekom, France Telecom, NTT, Verizon Communications, and other telecom giants. NASA is one of the company's customers. Sage Instruments was established in 1984 by CEO Brett Mackinnon, who is the majority shareholder in the company.

Sandvine develops equipment used by broadband service providers to better manage peer-to-peer network traffic. In addition to traffic management, the company's products enable network administrators to manage network security features. Sandvine serves clients including Hughes Network Systems and has sales partnerships with companies such as Telindus. The company received private funding from such investors as BDC Venture Capital, Tech Capital Partners, and VenGrowth. Sandvine was co-founded by veterans of former digital video distribution systems developer Pixstream, which was acquired by Cisco Systems.

Santur corporation makes widely tunable laser components for optical communications networks, especially long-haul WDM (wavelength division multiplexing) systems. The company's transmitters and transponders use an array of lasers integrated on a single chip combined with an external modulator for wide tunability with reduced power loss. Santur's products are intended for use by telecommunications carriers, such as AT&T and Sprint Nextel. The company's customers include CoreOptics, Harris, and Opnext. Santur was founded in 2000 by Bardia Pezeshki (former CTO) and Ed Vail (director of packaging).

Satellite Engineering Group, Inc. (SEG) won't be blasting its way into orbit anytime soon. Despite the name, Satellite Engineering Group, Inc. (SEG) has taken a grounded approach to its business offerings, specializing in in the sale and distribution of cable TV, broadcast, satellite, and VSAT- related products. Customers consist of telephone and cable companies located around the world.Satellite Engineering Group, Inc. (SEG) also offers installation, maintenance, and systems integration services for clients located throughout North America. Thanks to distribution agreements with Motorola and the Scientific-Atlanta unit of Cisco Systems, Satellite Engineering Group supplies products for most US cable platforms. The company was acquired in 2009 by TVC Communications.

SCOTTY Group (formerly Motion Media) designs and develops video and audio telecommunications systems used to enable broadcasting, distance learning, videoconferencing, and security services among others. In addition to corporate clients, the company serves consumers, government agencies, educational institutions, healthcare providers, and security and surveillance organizations. Customers include BT Group, Orange, Vodafone Group, Ericsson, Sprint, FOX News Network, and the US Veterans Administration. SCOTTY Group operates from subsidiaries and offices in Asia, the UK, and the US.

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