User's Guide

2 Sapphire Eye 4
7signal Ltd, Panuntie 6, FI-00620 HELSINKI, FINLAND, [phone], [e-mail], www.7signal.com
7signal Sapphire Carat Carat User Guide Release 3.0
A monitoring station conducts both passive and active measurements in a WLAN environment.
The passive measurements consist of listening to data traffic that uses the IEEE 802.11
protocol and of general analysis of the radio frequency spectrum in the coverage area. Passive
measurements have no effect on the functionality or utilization rate of the target network, or
the effect is very small (probe request transmissions). During active measurements, Sapphire
Eye contacts each monitored access point in turn and uses the network services via the WLAN;
i.e., it acts like a user or other client in the network. Using both active and passive
measurements, the 7signal WQA solution can monitor the experienced network performance
along the entire length of the service chain and locate problems in both WLAN and LAN
environments.