I installed the update yesterday and broke everything:
Grandstream phones in the office started calling themselfs and i resolved by upgrading the firmware and using default templates (except a 1620 that doesnt want to upgrade, still figuring out).
Now after the SP3 i can make calls but i cannot receive any call from the outside. When i try it simply drop the call; i tried with a free account on messagenet and when i call doesnt drop but i get a voice mail message from messagenet.
I have a backup of the configuration pre-sp3 but not the setup (exe) for the install
PBX on Windows
Various Phones: GS 1620, GS 2160, Yealink T28P and Yealink T46G
EDIT1: i backed up, removed and reinstalled the latest version using the new backup and now everything is working