The most popular type of entry phone is a door entry system used in flats, but you may also want something where you can open the door from one or more rooms in your house. A security expert or locksmith is the best person to consult on the best type for you, but a carpenter or joiner should be able to fit one in your door.
They will need to attach the entry phone system to your lock, or install a new lock, and they may need to chisel out a larger hole in your door for the locking mechanism. The cost of the job will largely depend upon the system that you decide to have installed. Some tradesmen will give you a quote for the whole package, whereas others may offer to install a system that you purchase yourself. A good professional should be able to advise on new or replacement entry phone systems that they have installed before and that previous customers have been happy with.
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