It work with technology that can connect to communication networks. So when person send message or call, info can go to the investigators who need it. Its not spying really, more about safety and follow law. Companies like Sino-Telecom make the tools for this. They build secure and fast systems, so only right people can see the lawful interception information.
Where to Find Reliable Wholesale Lawful Interception Solutions
Lawful interception play big role to make security better and follow rules in modern time. This way let authorised agencies monitor talks legally, essential for fight crime and protect citizens. For example police use it to find criminals or stop threats before happen. They can listen calls, read messages, watch online stuff, but only with permission from judge or authority. This ot network visibility legal part very important