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Telephone conferencing services
Video conferencing/teleconferencing services
Facsimile (fax) services
Value added telephone services
Trunked radio service providers
Payphone card network operators
Network providers for mobile telephones (cellular phones)
Paging services
Telephone answering services
Telephone directory enquiry services
Telecommunication operators
Telephone network operators, wireless local loop
Telephone network operators, analog
Telephone network operators, digital
Cloud computing services
Internet access providers
Internet service providers (ISPs)
Holding companies, telecommunications
Holding companies, services
Telephone conversation recording machines
Telephone answering machines
Telephone call counters
Telephone call logging equipment
Coders and decoders, telephone systems
Voice and/or video mail systems
Voice recording (logging) systems, digital
Voice announcer systems, digital
Speech scramblers and telephone privacy equipment
Telephone muted call system
Global system for mobile communication (GSM) modules
Automated attendant systems, telephone
Telephone plugs and sockets (jack type)
Wireless communication headsets
Telephone booths and room hoods, acoustic
Telephone switchgear, selector and accessory equipment
Music on hold and digital announcer systems for telephone systems
Filters for telecommunications
Connection and protection boxes for telephone and telematic transmission equipment
Accessories for external telephone lines
Mobile telephone (cellular phone) jamming equipment
Mobile telephone (cellular phone) detectors
Uniselectors, telecommunication
Telecommunication multiplexers
Discriminators, telecommunication
Line communication system line extenders
Manual telegraphy equipment, Morse and Hipp, Baudot, Hughes
Integrated services units (ISU)
Noise suppressors, telecommunications
Microwave rotary joints
Concentrators, telephone line
Audio detectors
Ear sets and microphones, hands-free, for mobile telephones (cellular phones)
Accessories for mobile telephones (cellular phones)
Frequency changers, telecommunication
Control and monitoring equipment for data transmission systems
Telephone set components and accessories
