Entry phone systems come in various configurations, but you will usually need a locksmith, electrician and/or a carpenter to repair one that operates with your external door. Some entry phone systems just give the householder a way to communicate with callers, whereas more complex systems allow you to open the door with a button on the phone, as well as seeing the caller on a video screen.
Problems can occur with the technology and electrics behind the entry phone system, the mechanics of the locking system or the fit of the locks. The cost of the job will largely depend upon the type of entry phone that you have and any replacement that you choose to buy, but the installation of a basic set up should not be costly in terms of labour. A security expert or locksmith should be able to advise you on the best system to choose for you home as well as knowing the most effective ways to repair your current system.
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