Apartment Intercoms
Apartment intercom systems can vary from telephone based systems that call a handset using older audio only telephone technology to IP Video based systems with touch screen directories and cloud management.
Cabling may be telephone cables or multicore alarm cabling and may even include coaxial cable and multiple multicore cables with some systems.
Understanding the cabling system is first step to any intercom system and particularly apartments because of the amount of cabling work required.
There are solutions which bypass cabling altogether: Upgrading an Apartment Intercom System without recabling