An intercom is an electronic communications system within a building or group of buildings. Intercoms are generally composed of fixed microphone/speaker units, which connect to a central control panel. A small home intercom might connect a few rooms in a house. Larger systems might connect all of the rooms in a school or hospital to a central office. Intercoms in larger buildings often function as public address systems, capable of broadcasting announcements. It contains master station, sub-stations, door stations and power supply. Master station initiates a call with any of the stations. Sub-stations and door stations are capable of only initiating a call with a master station. Power supply is used to feed power to all units.
An intercooler is a device used on turbocharged and supercharged internal combustion engines to improve their volumetric efficiency by increasing the amount of charge in the engine by lowering charge air temperature, thereby increasing power and reliability. It is also known as a charge air cooler, especially on larger engines that may otherwise easily self-destruct with high intake-air temperatures.
Interface cables provide direct communication between UPSs and desktops, workstations and servers. Interface cables are available for connecting to the WAN interfaces on a router. These cables contain a special ID, which informs the router of the interface type required and used to configure the WAN interface.