The SENSEI Pan-European testbed realizes a subset of the SENSEI techniques for integrating heterogeneous sensor networks with the Internet. 

 * What makes up the testbed? Reference the figure. 

[[Image(deployment-highlevel.jpg, 400px)]]

 * What components make up the testbed? Reference to Components wiki section.

 * What roles are played in this setup? Reference the Roles wiki section.

 * How does the testbed work?