Underground Telephones

Together with TELKOM-TELOS SA, of which Telvis is the sole shareholder, it is the largest industrial and intrinsically safe telephone manufacturer in Poland and one of the largest in Europe. All devices are certified in accordance with the European Union's ATEX 100A and EMC directives, which permit the use of the CE mark.

Since 1988, they have been manufacturing the highest quality devices and systems for telephone and alarm-broadcast communication in industrial design for Group I - Category M1 and Group II - Category 1 hazardous areas. Their solutions have been successfully operating for years in coal, copper, and salt mines, in petrochemical plants, and in industrial facilities requiring reliable wired communication under extremely harsh conditions.