Phone provisioning means the phone automatically connects to the Private Branch Exchange (PBX) after booting and is assigned a phone extension. Phone provisioning is used for automatic configurations of the selected hardware Session Initiation Protocol (SIP) phones.
This article provides information about how phone provisioning works.
Phone provisioning works as follows:
- The telephone boots in the network and sends a DHCP request for an IP address.
- The DHCP server accepts the request, assigns an IP address, and sends it back in a DHCP reply. Besides the IP address, the message also contains TFTP (Trivial File Transfer Protocol) server address.
- SIP phone connects to the TFTP server integrated into Kerio Operator.
- Kerio Operator checks whether the phone is new:
- If it is new, Kerio Operator generates a new phone extension for the phone.
- If it is not new, Kerio Operator finds the extension which the phone has used.
- Kerio Operator generates a configuration file suitable for the particular phone type and sends it via the TFTP protocol.
- The phone is configured using the values it has acquired in the configuration file and is ready to be used.
Note: Some phones perform an automatic restart during the configuration.
The following image shows a graphical representation of automatic phone provisioning: