I would like to have a UC solution in HQ and have one or two IP Phones in the remote locations.
Have some technical questions as below, and what would be your recommendation for such setup?
Is it mandatory to have Call Manager in every branch?
For IP Phones in the branches to be registered into CM in HQ, some kind of L2 VPN connectivity is needed like VPLS or EVPN?
Thanks in advance!
R