What function could this have?

Irving

Joined Jan 30, 2016
3,885
Its an isolation transformer module for 10baseT LAN connection. At a guess it connects to the socket above labelled JLAN which looks like a PCB-mounted RJ45 LAN Port...

I can't find a datasheet for that exact part, but its probably similar to NS6925417, it could be an older version or a custom job.
 
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