I currently have a local network setup using CPE510's (which works superbly) and now want to add another network using CPE210's pointing in a different direction.

My question is: Can I use the existing POE and ethernet cable to my existing base CPE510 and "split" the ethernet just before the 510 to feed the 210.

Getting the ethernet cable from my PC up through the house and out to the mast is a nightmare, particularly with my 70 year old joints.