Auto Provisioning Polycom Phones via DHCP Option 160 with EdgeMax/EdgeRouter

Need to automatically provision your Polycom phones against Endpoint Manager in FreePBX, or another config source with a Ubiquiti EdgeRouter? 

Simply add this to your DHCP configuration and substitute YOUR_DHCP_NAME_HERE, your subnet (192.168.100.0/24) and the IP address (192.168.100.5) or name with your provisioning server below.  To change to ftp or http, simply change the URL prefix.

set service dhcp-server global-parameters "option option-160 code 160 = string;"
set service dhcp-server shared-network-name YOUR_DHCP_NAME_HERE subnet 192.168.100.0/24 subnet-parameters "option option-160 "tftp://192.168.100.5";"

Took me a while of searching and experimenting to get this right, but I can tell you with tftp and the exact example above it works perfectly!  

Also at my tech blog: http://blog.waldrondigital.com/2016/10/13/auto-provisioning-polycom-phones-via-dhcp-option-160-with-edgemaxedgerouter/