Just wanted to add a few notes on our new SIP phone.
PROS:
- easy to setup with FreePBX or any other PBX system
- cheap as dirt ($32 on Amazon at the time of writing)
- very solid phone with good design all around
- easy to use and fairly straight-forward to add custom features
- simple address book syncing with PBX or any other external data
That is besides OK web interface.

CONS:
- documentation is hard to find on some custom settings/featuresThere's no place like ~

There was one issue with setting this phone with FreePBX.



Auto-generated password (Secret) by FreePBX is too long for Htek UC840P. Shorten it to 11 characters and phone accepts it fine.
No warning issued by account setup form - it just would not register.



Remote Phonebook:



Setting-up remote phonebook is quite straight-forward but, if XML file is used in our case this format did not work with multiple phones for one entry:


had to use separate entry for each phone:


Phone refreshes remote phonebook on reboot, did not try the restart. Yes, phone can be restarted or rebooted.
CURL can be used to restart phone remotely, i.e.

for some reason if CURL called from cron, authentication fails but if call repeated - it works fine.There's no place like ~