how to sending data to enddevice from coordinator through router

we are using xbee,coordinator and router and enddevice these are in the same network.but i didn’t get the how to send data through router to enddevice?

First, allow the Router to associate with the coordinator. Then set NJ to 0 on the coordinator. Next allow the end device to associate with the router. Now set the DL and DH of the coordinator to match the SL and SH of the end device. Send data one packet at a time as the router can only hold up to 120 bytes or two packets for an End device at a time.