Abstract: According to an aspect of the present invention there is provided a VoIP asset discovery system for discovering and identifying VoIP assets on a VoIP network, the asset discovery system comprising an IP address module for determining at least one IP address to discover, a port scanner for scanning VoIP specific ports of the received IP addresses, a service detection module for detecting a VoIP service at the received IP addresses. The asset discovery system further comprises a fingerprinting module for fingerprinting VoIP applications based on responses received to specific queries and a correlation module for correlating the information from the port scanner module, the service detection module, and the fingerprinting module to identify the instances of the discovered assets.