Abstract: A network monitoring device and methods for monitoring data streams in an IP surveillance network. A capture filter of the device captures data packets from a data stream between first and second end-points of an IP surveillance network. A packet parser of the device parses packets captured by the capture filter to obtain packet information. A stream model of the device creates and stores stream records corresponding to data streams and either matches the packet information to a stream record listed in the stream model, or, if no match is found, to initialises a new stream record for the captured packet. A monitor of the device applies one or more rules to the captured packets and executes one or more actions based on the application of the one or more rules.

Abstract: A method and apparatus to assist users to understand the operation of a telephone in a system comprising a telephone with buttons, a telephone controller and a memory, said method comprising