I’m a fresh engineer in M&E consultant. Often I have to design various ELV and security system but I have not very sure what cable needed to used in the applications. Can anyone please help me to get clear what type of cable to be used in the following system?
a) CCTV
b) Door Access (EM Contact, card reader, push button)
c) Public Address System (Ceiling speaker)
d) Security alarm (Magnetic alarm contact, siren)

Thank you.

Purchased a Security Blackbox camera dvr system. Probelm is i get a message from the Device Manager, Need to install Video controller. I have no disks and the company is out of business. Anyone one what i can do??
What is the chipse manufacturer? Not sure what that means, is that the company with made that chip.??

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