MH Connectors MHDA 25-S-MJ8
RJ45 to 25 Way D Inter Series Adapter
RJ45 Modular socket connector to 25 way D type socket.
You are buying 3 of these adapters here!
The RJ45 input socket has 8 gold plated pins,
it is connected via multi coloured wires within the shell to 8 gold plated socket pins,
these will simply push and lock into the casing of the 25 way D type socket shell (pin position is user defined 8 positions being used 17 will remain empty).
The D type side has two locking thumbscrews, these will retain the D type and if necessary lock the adapter into a mating D socket.
For datasheet copy and paste:- http://www.datasheetarchive.com/dl/Scans-020/ScansEX17174.pdf