Abstract: An apparatus for monitoring a digital television decoder connected to a network comprising a monitor engine and a monitor server wherein the monitor engine is operable to receive and/or retrieve raw event data from a digital television decoder connected to a network, generate significant event data in dependence on the received raw event data and in dependence on a set of predetermined rules, and transmit the significant event data to the monitor server which is operable to receive the significant event data from the monitor engine and store the significant event data, the monitor server being operable to retrieve the significant event data on request. Also provided is a method of monitoring a digital television decoder connected to a network comprising the steps of a. receiving and/or retrieving raw event data from a digital television decoder connected to a network; b. generating significant event data in dependence on received raw event data and in dependence on a set of predetermined rules; and c.