IP networks
IP is replacing telephony as the most important form of communication. Internet applications like chat, e-mail and instant messaging are becoming more and more popular. This shift puts pressure on Communication Service Providers worldwide for implementing Lawful Interception in their IP networks.
The best, or sometimes the best affordable way, for Lawful Interception varies from network to network. In some situations active interception suits best because of the network equipment used. Other situations require passive interception to render the best solution for lawful interception. Even combinations of active and passive interception are not uncommon.