Provisioning Polycom, Yealink, and Grandstream phones from a hosted PBX

Hand-configuring a SIP phone through its web UI is fine for one phone. For five, ten, or fifty — you want auto-provisioning: the phone boots, fetches its config from your PBX, registers, and just works. This article covers the auto-provisioning workflow for the three vendors most LYLIX customers use: Polycom, Yealink, and Grandstream.

What auto-provisioning does

The phone boots. It looks up a configuration server URL (either from DHCP option 66, from a built-in default, or from a manually- entered URL during initial setup). It downloads its config file from that URL — typically named by the phone's MAC address (e.g. 0004f2123456.cfg). It applies the config and reboots into the configured state.