Connecting this equipement to the home phone line, you can send commands using the dual tone phone keyboard, in order to activate your heating system or other devices, without the need to connect them to the recever, since it operates through radio-controlled modules. A local wired connection is anyway provided to switch-on a PC programmed to wait for incoming Remote Desktop calls. The receiver drives the slaves through a momentary or two states logic, as desired. A personal PIN number is required to access from remote, in order to avoid unwanted or malicious usages. Full project is here: http://www.purchiaroni.com/progetti/SpuTel/SpuTel.html