Digital communicator (Digi ) is the most cost effective method to connect an alarm to a receiving centre. A digital signal is down the telephone line to the receiving centre and then all details are displayed to an operator who can then take the required action. i.e. call Police, key holders etc. Both domestic and small commercial/retail premises are suitable for this type of monitoring. Prices start from only £16 per month by direct debit. If you are a business you should check with your insurance provider that this type of monitoring is acceptable.