I am new at this but studying hard. I have the XBee S2, not the PRO version. In X-CTU Modem Configuration - Modem: XBEE there is the option of XB24-B or XB24-ZB. I am trying to find what the difference is. I assume XB24-ZB is just newer more up-to-date?
I see in XB24-B there is "ZNET 2.5 Router/End Device API (version 1347)and in XB24-ZB there is ZIGBEE END DEVICE API (version 29A0).
I have a point to multi-point configuration so I do not think I need a router, just an end-point.