The InformaCast licence allows the SingleWire InformaCast protocol to be used. Licences are generated by 2N according to the particular serial number. After you decide which licence you want, you need to get the serial number of your unit and contact your distributor for the licence key. The licence itself comes as a key, alphanumeric string, so it can be easily sent via email and copied and pasted into the intercom. Licences are not limited in time. Once you have a licence, you have it for good. In order to activate the licence, you need to log in to the intercom web interface and paste the licence key into the System / Licence field. When you click Save, the licensed features are immediately activated. Licences can be downloaded automatically in the System / Licence menu. Once we get your order we will contact you so you can provide the serial numbers of the product(s) requiring the licence.