In an industrial environment, several fibre optics are usually bundled inside a multi-core optical cable (outdoor armed cable) to connect the switch room with the production area.
The individual fibre optics must be connected to the individual fibre optics of the multi-core optical cable via optical connectors.
This is usually achieved by means of a splice box, which is available in various designs.
Some have a large number of optical connectors for connecting a multi-core optical cable with individual fibre optics.
Splice box with 8 optical connectors for 4 data connections (for sending and receiving):

The simpler versions usually have 2 optical connectors (Rx and Tx), into each of which two fibre optics of the optical cable are spliced. It is usually possible to combine these in a block, resulting in a variable number of optical connectors.
Distribution of 4 fibre optic data connections with 4 single splice boxes.

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