Modular Connectors and RJ Connectors from Black Box

Red Modular Adapter Kit DB25 Male to RJ45 Female -- FA4525M-RD

 
 
Red Modular Adapter Kit DB25 Male to RJ45 Female -- FA4525M-RD -- View Larger Image
Red Modular Adapter Kit DB25 Male to RJ45 Female -- FA4525M-RD-Image

Adapt DB25 RS-232 ports to RJ-45 modular jacks. Other colors, as well as RJ-11 versions also available.