SNCF platic box <STM> (Signalling - Telephony - Multiples) on two stakes. This type of STM box is often present near a level crossing. It may contain a relay, bars or fuses, diodes, etc.), in this case it is used to make the connection between the overhead line (telephony) and one or more cables protected by fuses. FBX/PBR Phiphitrainz 2022 3d object made from documents by Georges Pinthon.