How the Three Xbee Communicate in Transparent Mode/AT

I Want to communicate Three Xbee S2C TH Reg In AT mode , Coordinator connected with arduino and router Stand alone without arduino and End Device connected with arduino to send data to coordinator via Router for achieve high distance. Is it possible and how
Thanks In Advance

Try following what is listed in https://forms.na1.netsuite.com/app/site/hosting/scriptlet.nl?script=457&deploy=2&compid=818164&h=5928a16f2b6f9582b799&articleid=461

While this is not using an Arduino, the steps are the same.