Verkkoliitäntälaiteyksikön

Verkkoliitäntälaiteyksikkö, often abbreviated as VLU, is a Finnish term referring to a network interface device. It acts as a crucial bridge between a customer's internal network and the public telecommunications network, typically provided by an internet service provider or telecommunications company. The primary function of a VLU is to terminate the incoming network line, such as an optical fiber or copper cable, and convert the signal into a format that is usable by the customer's own equipment, like a router or modem.

This device is essential for establishing and maintaining internet connectivity. It handles the physical connection and often performs initial signal processing. Depending on the specific technology, the VLU might also incorporate functions like power supply for the incoming line or basic diagnostics. In many modern installations, the VLU is a compact unit installed at the entry point of a building or residence. Its presence signifies the point where the service provider's responsibility for the network ends and the customer's equipment takes over. Understanding the role of the VLU is key to troubleshooting network issues and understanding the structure of a typical home or business internet connection.