How to get Throughput of the network formed with XBee PRO S2 modules?

We are working with XBEE PRO S2 modules, y we are analizing the performance of our network for this reason we need to know how to get the real throughput, we mean the real bits per second that each module transmits to the gateway.


If you look in the product manual for the XBee ZB OEM RF Module, you will find it listed.