(129 companies) Automated voice answering systems are used to take messages and to provide automated information retrieval requests.
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(161 companies) Global positioning system (GPS) modules and GPS devices are radio-navigational devices that provide accurate position information about objects on Earth, based on information from orbiting satellites.
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(150 companies) Intercoms are an electronic communications system generally composed of fixed microphone/speaker units connected to a central control device.
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(6 companies) Magnetic receivers use the electromagnetic principle to receive and analyze signals. The simplest of these devices is the telephone.
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(157 companies) Navigational instruments include products such as distance meters, range finders and mapping systems.
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(6 companies) Optical interconnects are used in telephone (voice) and TV applications, as well in data communications, sensing, and high-speed computing.
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(19 companies) Pagers are electronic communications devices that are used to notify or alert a user about an event. They beep, vibrate, flash, display text, and use other alerts or methods of notification.
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(71 companies) Phone switchboards are used for routing telephone calls and adding advanced features to telephone systems.
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(94 companies) Radar systems and radar products have synchronized transmitters and receivers that send radio waves and detect their reflections from objects, surfaces or sub-surface structures.
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(257 companies) Radios are communication systems that send and/or receive electromagnetic waves. Devices such as citizens’ band (CB) radios, walkie-talkies, and handie-talkies are two-way radios that can be used for interpersonal communications.
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(96 companies) Specialty communication devices use specialized or proprietary interfaces or technologies.
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(452 companies) Telephone components and telephone accessories are used in telephone systems.
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(400 companies) Telephones and cellular phones convert voice or other sound signals into a form that can be transmitted to another device that receives and reconverts the waves back into sound.
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