User's Manual

4 Sonar 6
7signal Ltd, Panuntie 6, FI-00620 HELSINKI, FINLAND, [phone], [e-mail], www.7signal.com
7signal Sapphire Carat Carat User Guide Release 3.1
4 SONAR
The role of the Sonar test server in 7signal Sapphire is to emulate one of the customer’s
production servers. Sapphire Eye connects to Sonar to measure QoS provided by the network.
Measurements are performed both directions (uplink and downlink). Uplink means traffic from
end-user device (e.g Eye) towards network (e.g. Sonar). Downlink means traffic from network
towards the end-user device.
Single Sonar can serve several monitoring stations which has access through IP networks to
Sonar. One Sonar can therefore be used as the test point for several networks.
The 7signal Sapphire WQA solution supports the concurrent use of several Sonar test servers,
which means that Sonar can be installed on several servers within a company. Using several
Sonars enables the company to detect and locate problems in its network. Sonar can be
located in the same network as the access points, in a server room in the same building, or
anywhere on the Internet – such as in the centralized identification and authorization center of
an international organization.