Remote access data visualisation system

Using a World Wide Web browser having the capability of downloading software, a user can download data together with data visualization software. In a particular arrangement, the user can download traffic data from the call records of a network provider, in relation to particular network numbers. By downloading a data visualization software tool at the same time, the user can look almost in realtime at events on the network. This means a service provider, providing a service on the network can monitor the response to an advertising campaign for instance where a Freephone number has been launched.