Ralph Terry Blakemore

Black Box Corp. engages in the provision of information technology infrastructure solutions. It operates through the following segments: North America Products, North America Services, International Products, and International Services. The firm offers cabinets, racks and enclosures; cables; carts and storage; datacom; digital signage; jacks, panels, and hardware; networking; power solutions; premises security; testers and tools; video and multimedia; voice communications; and universal serial bus (USB) connectivity products. The company was founded in 1976 and is headquartered in Lawrence, PA.

Part of Essar Group, TennMark Telecommunications, Inc. is a company that manufactures communications and networking products. The company is based in Nashville, TN. TennMark Telecommunications was acquired by Black Box Corp., part of Essar Group from January 08, 2019 on December 30, 1999.

Norstan, Inc. provides communications solutions and services. Its services include protectnet life cycle services, project management, implementation, field delivery, voice and data network monitoring, managed and professional services. The company is headquartered in St Paul, MN.