Texas businesses call on WalkerCom for their phone and data communications systems needs. Founded in 1987, WalkerCom company sells, installs, and services telecommunications equipment from suppliers including Avaya, Polycom, and Plantronics. It deals in such products as network routers, wireless phones, cabling, and software. WalkerCom specializes in equipment for Applications including corporate messaging, call centers, wide area networking, and video conferencing.

Pentek Pentek provides electronic assemblies and single- board computers for cellular phones and other wireless devices, control and imaging equipment, radar and sonar systems, satellite communications, and telecommunications, among other applications. The company's digital signal processing boards use processors manufactured by Freescale Semiconductor and Texas Instruments. Its software radio products include transceivers and digital receivers. The company was established in 1986. Pentek's ownership is evenly split between co-founders Daniel Shamah (president) and Rodger Hosking (VP).

City Telecom (H.K.) Limited was founded in 1992 and is based in Kwai Chung, Hong Kong. City Telecom (H.K.) Limited, together with its subsidiaries, provides international telecommunications services and fixed telecommunications network services in Hong Kong and Canada. Its international telecommunications services include international direct dial service, international calling cards, and international call forwarding service. The company’s fixed telecommunications network services comprise dial up and broadband Internet access services, local voice-over-IP services, IP-TV services, and corporate data services. As of August 31, 2009, it had approximately 943,000 fixed telecommunications network service subscriptions consisting of 391,000 broadband Internet access, 382,000 local VoIP, and 170,000 IP-TV services subscriptions.

Public Communications Services (PCS) designs and installs inmate telephone systems for state, federal, and county correctional facilities across the US. Its systems feature collect, pre-paid, and debit calling, as well as automated call processing and security features like blocking of certain phone numbers. Clients can also use the company's proprietary systems management software, called SOPHIA, to run reports on inmate usage and to monitor and record conversations. Customers include the Ventura County, California Sheriff's Department and the Federal Bureau of Prisons.

Sarantel's revolutionary ceramic filtering antennas offer dramatically improved performance over existing antenna designs, resulting in a clearer signal, better range and a 90 per cent reduction in the amount of signal radiation absorbed by the body. Because of their smaller size and higher capabilities, Sarantel's antennas enable manufacturers to create innovative wireless products for the GPS, WiMax, Satellite Radio and Satellite phone markets.Sarantel has developed an intellectual property portfolio comprising of over a dozen core patents with hundreds of international filings on the design and production of dielectrically loaded antennas.

Singapore Telecommunications (SingTel) maintains a long-distance relationship with many of its customers. The company provides wireless and fixed-line communications services to consumer and enterprise subscribers in more than 20 countries, primarily in the Asia/Pacific region. SingTel is Singapore's largest phone company, but subsidiary Optus, Australia's #2 carrier (behind Telstra), accounts for about two-thirds of the company's revenue. SingTel primarily provides mobile and broadband Internet services, but it also offers wireline telephony, information technology, as well as pay television services under the mio TV brand. It provides Internet services domestically through SingNet, the leading ISP in Singapore.

WaveSplitter Technologies makes a spectrum of products that serves both to divide and to unite. The company's photonic components and modules extend the reach of optical signals and boost the capacity of communications networks. WaveSplitter's products include its WavePump pump laser combiner, which increases the strength of transmissions, and wave division multiplexers and couplers (WaveEssentials) and optical signal filters (WaveSelector), which separate and combine light waves. Goldman Sachs, Intel, NEC, and Sumitomo Electric all hold stakes in WaveSplitter. The company, which has privately raised more than $100 million, was established in 1996.

Gooch & Housego (G&H) manufactures precision optical components. The company's products are designed primarily for use in light measurement instrumentation and crystal manufacturing. It was founded in 1948 to make precision glass and crystalline materials; it still makes precision optics, such as coatings, lenses, prisms, and mirrors. G&H also offers acousto-optic devices, such as frequency shifters, tunable filters, fiber-coupled modulators, and standard and custom Q-switches. In 2007 G&H acquired SIFAM Fibre Optics for £5 million. The next year it bought the assets and business of General Optics from GSI Group for $21 million. Gooch & Housego PLC company does much of its business in North America.

USA TELEPHONE is the alternative for telephone service from Maine to Maryland. The company is an Unbundled Network Element Platform (UNE-P)-based Competitive Local Exchange Carrier (CLEC). USA leases network assets from incumbent carriers to provide local and long distance voice to residential and select small business customers. The company offers incomparable customer care with some of the lowest local and long distance rates in the country.

mobilkom liechtenstein serves a small nation that plays a notable role in the European marketplace as a financial center and tax haven.mobilkom liechtenstein company provides wireless telecommunications services (voice, data, mobile Internet, and multimedia) to some 6,000 consumer and business customers in its namesake country; this comes to about 17% of the total population. It also has subscribers in Switzerland and Germany. mobilkom liechtenstein is a subsidiary of mobilkom austria, which itself is owned by Telekom Austria. mobilkom austria also has operations in Belarus, Bulgaria, Croatia (VIPnet), Macedonia, Serbia, and Slovenia.

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