Remote control signifies the possibility to access the installation from a location other than that where the supervised system is situated.
Normally, telephone lines are used, as they represent a stable and economic means of communication, above all when combined with the use of the Internet (TCP/IP protocol).
The use of the Internet with control and supervisory systems allows the user to access the information relating to the control system from any place with an Internet connection.
The client does not need specific software on the local workstation, as the application management environment is made available via the WEB using the standard Internet communication protocols (http, ASP, etc.).
In this way, systems (both hardware and software) can be expanded for little cost. In addition, as one remote station can connect to different sites, the operating costs of the remote control service can be shared between the different systems controlled.
A private digital line can be used to connect directly to the installation where the supervised system is located: this guarantees a more stable connection, however it requires a dedicated line and therefore higher operating costs.
In any case, the main objective of remote control technology is to optimise management and consumption and minimise energy and operating costs. Indeed, the specific objectives of remote control systems can be summarised as follows:

ENERGY OBJECTIVES:
reduction in energy consumption and energy waste; optimum management of comfort in the controlled environment; improved operating efficiency of the systems.

MANAGEMENT OBJECTIVES:
optimisation of preventive maintenance; management of faults and alarms in real time; reduction in physical intervention times; possibility to reduce the number of personnel physically supervising the systems; improvement in the quality of service provided.
In addition, the constant control of the typical values of the installation guarantees feedback for checking the main decisions made and the sizing of the systems.