I have been subsiding my clients for Groundwire as it is rock solid and Switchvox Mobile was just a basket case - especially in Telstra in AU. To discover that Sangoma have licensed a custom Groundwire from Acrobits is amazing - now I don’t have to eat $15 every time a client wants Softphones, the address book works and it can autoprovision!!! TheGiaKz - re outbound call delays, make sure you have the Acrobits push servers whitelisted and excluded from Fail2Ban. I had exactly the same issue and it turned out the push servers couldn’t hit my system. One I fixed that we were golden. I am very happy with this outcome.