Telvis - Underground and Shaft Communication Systems and Telephones

The MIT meter is locked in a portable casing, providing IP54 protection degree, and contains a battery sufficient for a minimum of eight hours of continuous operations.

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  Telvis’ TIG telephone sets have been designed for exploitation in hard...
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  PST are used for announcing alarm signals, voice and acoustic messages sent...
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  Telvis’ ITM telephone set enables the checking of lines and equipment of...
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  The stationery part of the ITS shaft communication system consists of a...
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  The MIT meter is locked in a portable casing, providing IP54 protection...

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