We have like 5 of these in the office. They have like 20 ports on them. I have no idea what the majority of them do. I assume most of them are some specialized

We have like 5 of these in the office. They have like 20 ports on them. I have no idea what the majority of them do. I assume most of them are some specialized binary data transport that I've never used or seen, though I have some weird half memory of similar ports on an early 90s IBM PC.