- Marconi
 - Global telecommunications equipment and services company providing optical networks, broadband routing and switching, and broadband access technologies and services. - Bookham Technology@
- EPC Services UK Ltd
- Provides advanced telecommunications and IT consultancy and project management. Also installs business telephone systems, videoconferencing, and voice PBX.
- Aston Telex
- Offers a range of stand alone and PC based telex machines, as well as telephone systems, from central control units to single cards.
- Telecommunications, Phones, Fax, and Headsets Directory
- Lists suppliers of business telecommunications equipment, fax machines, BT office phone systems, Siemens phones, and Bluetooth phone headsets.
- Visual Contact
- Offers videoconferencing, video phone products, and consulting services.
- Direct Communication Radio Services (DCRS)
- Dealers for manufacturers including Motorola and Dolphin.
- Portsmouth Communications
- Supplies and installs new and used business telephone systems. Also provides cabling, electrical, and PC installation services.
- Andrews & Arnold Orange Mobile Phones
- Sells telecommunications equipment, specialising in ISDN.
- BT Business Information Systems
- On-site communications equipment and services for all sized businesses.
- Netbricks
- Develops, manufactures, and supplies telecommunication technologies to computer and communications equipment manufacturers.
- Racal Translink
- Provide advanced and specialised telecommunications solutions with emphasis on the transportation market.
- PRP Telecom
- PRP Telecom provides business phone systems and communications solutions to companies throughout the U.K. Includes VOIP solutions, structured cabling, and business headsets.
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