Fault finding publications and links for Cat 5/6, alarm systems, telephone systems

[CTID]

As the title suggests, can anyone recommend any publications or Internet links relating to elv systems. Most of my work is on large commercial systems and the company I subby to contract out for data/tv/alarm etc. I'd like to be able to learn as much as I can about these systems from recommended literature. Too many sparks I work with don't seem to know much about these systems. I'd be particularly interested in fault finding processes.

Thanks in advance folks

 

[amlu]

Re: Fault finding publications and links for Cat 5/6, alarm systems, telephone system

large data/tv/alarm.
no previous technical documentation available, so many different systems on the market, spending days figuring up what existing gear and spaghetti of wires supposed to do when it worked.