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Altigen Communications, Inc. designs, develops, markets, and supports integrated communications solutions worldwide. It provides MaxCS IP-PBX, a software-based phone system that provides customers with business communications solutions; MaxACD Voice Over Internet Protocol (VoIP) Contact Center, a software-based automatic call distribution engine, which offers call routing and call distribution options; MaxMobile that extends a set of business PBX functionality to smart phone devices; and MaxCommunicator, a Windows-based desktop application, which provides call control and visual voice mail management to the desktop. The company offers MaxAgent, a Windows-based desktop application to bring call control and workgroup information to call center agents; MaxSupervisor, a Windows-based desktop application for call center supervisors; and MaxACD for Skype, a call center solution. In addition, it provides hosted services, which include hosted IP PBX, Skype for Business, session initiation protocol trunk, call center solution, voice and video calling, conference calling, and various long-distance services; and software assurance services, which offer customers with software updates, patches, new releases, and technical support for the applications they are licensed to use. The company serves financial services, healthcare, retail, and business services industries through a channel of distributors and resellers. Altigen Communications, Inc. was incorporated in 1994 and is based in Milpitas, California.

ClearOne, Inc., together with its subsidiaries, designs, develops, and sells conferencing, collaboration, and network streaming solutions for voice and visual communications in the United States and internationally. The company offers a range of audio conferencing products, including professional audio conferencing and sound-reinforcement products for use in enterprise, healthcare, education and distance learning, government, legal, and finance organizations; mid-tier premium conferencing products for smaller rooms, and small and medium businesses, which interface with video and Web conferencing systems; USB-based personal and group speakerphones that could be used with PCs, laptops, tablets, smartphones, and other portable devices; and traditional tabletop conferencing phones used in conference rooms and offices. It provides professional microphones consisting of beamforming microphones, ceiling microphones, and wireless microphones. In addition, the company offers video products, such as video conferencing and collaboration solutions; professional-grade cameras; and AV networking, which deliver the IP A/V experience by streaming time sensitive high definition audio and video, and control over TCP/IP networks. It sells its commercial products to a network of independent professional audiovisual, information technology, and telecommunications distributors, as well as systems integrators, dealers, value-added resellers, and end-users. ClearOne, Inc. was incorporated in 1983 and is headquartered in Salt Lake City, Utah.

Communications Systems, Inc. engages in the provision of network infrastructure and services for global deployments of enterprise and industrial networks through its subsidiaries. It operates through the following segments: Electronics and Software, Services and Support, and Other. Electronics and Software segment designs, develops, and sells Intelligent Edge solutions that provide connectivity and power through Power over Ethernet (PoE) products and actionable intelligence to end devices in an Internet of Things (IoT) ecosystem through embedded and cloud-based management software. The Services and Support segment provides technology solutions that address prevalent IT challenges, including network resiliency, security products and services, network virtualization, and cloud migrations, IT managed services, wired and wireless network design and implementation, and converged infrastructure configuration, deployment and management, and SD-WAN network devices. The Other segment includes non-allocated corporate overhead costs.The company was founded by Curtis A. Sampson in 1969 and is headquartered in Minnetonka, MN.

Zoom Telephonics, Inc., together with its subsidiary, designs, produces, markets, sells, and supports Internet access and other communications-related products in North America and internationally. It provides cable modems and gateways, multimedia over coax adapters, digital subscriber line modems, mobile broadband modems and routers, dial-up modems, local area network products, mobile broadband sensors, wireless and wired networking equipment, phone jacks and AC power adapters, and language-related specifics. The company sells its products through retailers and distributors, Internet and telephone service providers, value-added resellers, PC system integrators, and original equipment manufacturers, as well as through a direct sales force and independent sales agents. ZoomTelephonics, Inc. was founded in 1977 and is headquartered in Boston, Massachusetts.

Zoom Technologies, Inc. does not have significant operations. Previously, it distributed wireless communication products in the United States. The company is headquartered in Beijing, China.