Hello!
I have all the experience you need, and already implemented many of Cloud and Local VPN/VOIP Servers for Egypt, China and Gulf companies
And I have many VOIP solutions and we can use the one that matches your needs, and I have many resources (DID/SIP Trunk providers and others) that can help us to add value to your VOIP System.
Also, I had a very good Experience with TLS protocol, so I can configure your VoIP system to work in the Gulf without need to VPN
And I have a perfect VPN Solution is working and bypass (break) VPN blocking, that is proved to link all your branches wherever it, with the cheapest cost
Kindly, if you are interested in my offer, feel free to contact me to discuss.