7signal Ltd., Helsinki, Finland, offers its Site Miner tool for troubleshooting WLAN networks and ensuring the end-to-end quality of WLAN deployments. Site Miner analyzes WLAN environments, reports on application usability, and identifies ways to improve network performance. It is based on a WLAN monitoring agent with an antenna array; the system monitors end-t-end network performance across multiple access points. It can perform either passive or active monitoring. The device can be used by wireless network designers, system integrators, and network administrators.