There is an abundance of security systems available all over the country.
There is a mind boggling array of accessories available for each system and for the novice or first time buyer it con become very confusing.
The preliminary step should always be to get a quotation from most of the available security system suppliers. They should do a thorough evaluation of your office security needs before they give you an estimate, not just give you one on the phone.
Check to see if a fire security system can also be a part of the entire system, since often these are sold as a complete system.
Look at all the vulnerable areas of your office, and make sure that these have been covered in the estimate provided.
Maintenance charges of many security systems are quite high, and are often not factored into the initial cost. These are essential to keep the system running smoothly and efficiently.
If you need to upgrade your system at a later date is it possible to do so? There will be a time when you will need a better system, and you should not have to install an entirely new system then.
Only after you get satisfactory answers to these questions should you begin the process of signing on the dotted line.