Portugal Telecom is the Portuguese market leader for fixed- line and mobile phone services. The company's primary mobile phone interests include Telecomunicações Móveis Nacionais, or TMN, the domestic provider. It also owns stakes in international telecom companies, including the Vivo joint venture with Telefónica Móviles, which is the leading wireless communications provider in Brazil. Portugal Telecom's fixed-line segment, PT Comunicações, provides domestic and international phone services and corporate Internet services. Portugal Telecom also provides interconnections and leases lines to other Portuguese carriers.

Proxim Wireless works without a wire when it builds nets. The company provides broadband wireless network equipment, including radios, bridges, and access gear. Communication carriers and service providers, enterprises, government agencies, schools, and health care providers use its products to offer network access, build video surveillance and public safety systems, and provide telecom backhaul connections. Proxim sells its products worldwide through distributors, resellers, systems integrators, and OEMs. Its engineering team works with channel partners and end users.

Purple Communications, Inc., together with its subsidiaries, provides video and text relay services, and professional interpreting for deaf, hard-of-hearing, and speech-impaired persons primarily in the United States. The company offers Internet protocol text relay services that enable deaf or hard of hearing callers to use an Internet-connected computer or wireless handheld device to place calls, which are connected to a relay operator under the ‘IP-Relay’ and ‘i711’ brands. It also provides video relay services, which enable a deaf caller to make a call by communicating with a sign language interpreter over a live video connection primarily under the ‘Purple Language Services’ and ‘i711’ brands. In addition, Purple Communications offers infrastructure and interpreting services for video relay services; and community interpreting services in situations where relay services may not be available or ideal. The company was formerly known as GoAmerica, Inc. and changed its name to Purple Communications, Inc. in February 2009. Purple Communications was founded in 1996 and is headquartered in Novato, California.

Antennas are par for the course at Q-Par Angus. The company makes microwave antennas, including broadcast, split reflector, broadband steerable, prime focus, and waveguide horn antennas. The company also makes antenna positioners, controller software, adaptors, polarizers, filters, attenuators, and phase shifters. Its research and consulting services range from radiation hazard surveys and microwave materials analysis to distance, depth, and moisture content measurements. Customers include QinetiQ, Thales Underwater Systems, and the UK Ministry of Defence. The company gets about 45% of its sales overseas. Q-Par Angus was founded in 1973 by managing director Richard Holliday and company secretary Jenny Holliday

If you're calling Qatar, you're calling Qtel. Qatar Telecom, commonly known as Qtel, is the exclusive provider of telecommunications services in the small Persian Gulf country. Qtel provides wireline and wireless communications, including national and international long-distance calling, Internet access, and cable television services to nearly 58 million subscribers in 17 countries. The company's joint ventures include Nawras, through which it offers mobile telephone service in Oman, and NavLink, a managed data services venture with AT&T serving businesses in the Middle East. Qatar's government partially privatized Qtel in 1998 by selling a 45% of the company but still retains a 55% stake.

Qiao Xing Mobile Communication brings the ring to Chinese callers on the move. The company, through its primary operating subsidiary CEC Telecom (CECT), manufactures a full range of mobile phone handsets. Qiao Xing offers about 50 different models and sells about 2 million phones a year under the CECT brand and its luxury line, VEVA. Its products, which are based around the GSM wireless standard, are sold to local and national distributors throughout China. The company operates its own manufacturing facilities but also utilizes outsourced services. Qiao Xing Universal Resources owns more than 60% of the company; its largest individual shareholders are brothers Zhi Yang Wu (Chairman) and Rui Lin Wu (Vice Chairman.)

The fabless apple doesn't fall far from the wireless tree. Qualcomm CDMA Technologies (QCT), founded as a division of QUALCOMM in 1995, designs integrated circuits (ICs) and software for wireless communications equipment based on the CDMA standard. QCT products go into mobile phones, navigation devices, notebook computers, and other consumer electronics. QUALCOMM pioneered the use of CDMA in commercial wireless applications and is the leading supplier of CDMA chipsets. Its products include baseband, radio- frequency, and power amplification chips. QCT is the largest segment of QUALCOMM, accounting for about 60% of sales.

Qwest Wireless' customers seek cellular and online satisfaction. The company is a reseller of wireless voice and broadband Internet services to consumers within a 14 state local calling area. Its services are enabled through a deal with network operator Verizon. Qwest's agreement with Verizon, which began in 2009, allows the Denver-based company to maintain sales, marketing, customer service, billing, and collection services under its own brand. The company is a subsidiary of Qwest Communications.

As the physical infrastructure for the Internet grows, so grows Radiall. The company manufactures electronic components for the aerospace, military equipment, telecommunications, and automotive industries. It makes antennas and microwave components (attenuators, couplers, terminations) for wireless networks and connectors for fiber-optic and coaxial networks. The company's rack and panel connectors are standard components used by aerospace giants Airbus and Boeing; other clients include Alcatel and Continental. Radiall also offers radio-frequency base stations for mobile networks. The Gattaz family founded Radiall in 1952 and still controls it. Nearly half of sales come from Europe.

Radio Frequency Systems has radio antennas and related products to enable everything from the rush hour traffic report to battlefield communications. The company, which does business as RFS, designs and manufactures a wide range of wireless and radio network infrastructure equipment used by broadcasters, telecommunications service providers, network equipment manufacturers, and government agencies. Products include radio-frequency (RF) systems, antennas, filters and combiners, cables, connectors, accessories, and related software. The company operates globally from 32 sales and support offices and nine manufacturing facilities located in Asia, Australia, Europe, and the Americas.

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