thumb|Integra-Signum trackside magnets Integra-Signum is a Swiss train protection system introduced in 1933. Originally it was called Signum; the name Integra was added later. It transmits data inductively and is simple, robust and reliable also in snow.
thumb|Integra-Signum trackside magnets Integra-Signum is a Swiss train protection system introduced in 1933. Originally it was called Signum; the name Integra was added later. It transmits data inductively and is simple, robust and reliable also in snow.
==How it works== The locomotives have three sending and receiving magnets and there are two trackside magnets near the signals.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).