Hi,
there is no provisioning model for Fanvil PA3
it is very famous Paging in korea.
we wish you help us 
here is firmware
https://www.fanvil.com/Support/download/id/135.html
Hello,
At the moment we don’t have support for gateways but we’ll investigate how the provisioning works and add it for a future update.
Hi roger,
Great !
thanks for reply