Checking the identity of a person entering or exiting a premise whether he or she is a friend, family member or stranger is a basic security measure performed in both homes and offices. Not all people realize that there are security risks when approaching strangers. You can't really know what their intentions are.
Ideally, a person or security guard performs this duty and ensures only authorized personnel or known individuals have access to the premises. Unfortunately, not all people can afford to hire full time personnel to guard their entrances and exit. Is there an alternative solution? Yes, intercoms and video door phones provide an inexpensive way of monitoring people entering and exiting your premises. Using a intercom system, you can check who is outside your door and talk to him or her before approaching. With a video door phone or intercom system in place, you have protection against possible attack when approaching an unknown individual.