Hardware to Software

Hello everyone, The last six years I've been involved with radio transmitting equipment. From large fm and tv broadcast stations to small home based HAM and personal communications equipment. But mostly I work with cellular sites with the major wireless carriers. Since I've been involved in the wireless community, I've installed alot of wireless site to site broadband networking equipment. I never had the chance to get into the software side of things and I've allways wanted to know how it all actually worked and what type of security it takes to keep them secure. Basically anything computer related interests me, so I'm open to learn anything really, I look forward to it :D