How do Zero Touch Provisioning Servers Work?
This article will explain the basics of what Zero Touch Provisioning Servers are and how they work. For more in-depth information such as ZTP security, please seek documentation from the brand's manufacturer.
Examples of Zero Touch Servers are 'Polycom ZTP', 'Yealink RPS', and the 'VTech Redirect Server'.
What are they?
ZTP servers are an easy way for individual phones to get ahold of their provisioning server's address (http://sipcfg.io/cfg). They are typically Servers controlled by the manufacturer that allows you to input a MAC Address and a provisioning server URL. ZTP Servers typically do not house the configuration file itself.
When the phone powers on, it will check-in with its manufacturers ZTP Server. If the MAC address exists on the ZTP Server the phone will automatically grab the provisioning link and attempt to pull its configuration file.