Insulated cables (so-called ‘stack cables’) in various lengths fitted with connectors at both ends. Each cable consists of 32 insulated single conductors for a voltage not exceeding 1 000 V, bundled into 16 sheathed pairs which are not twisted. These pairs are covered by a metal foil and metal threads. The cables connect switches that form switching stations (so-called ‘stacks’) used in telecommunication networks (Local Area Networks (LAN)). They enable the bidirectional transfer of data between switches using Ethernet technology. The cables do not have any additional functions (for example, to supply electric power).
[1][1]. https://eur-lex.europa.eu/legal-content/EN/TXT/PDF/?uri=CELEX:32018R17...