- Which Mikrotik hardware and software (RouterOS level) do I need?
the rb1100ahx2 is the best hardware for central office, en the remote office you can use a rb450G.
- The hardware in the central site is capable to support the seven tunnels at the same time?.
yes,
- VoIP to be implemented in the future, Mikrotik has any hardware that could run Asterisk?.
yes, read the metarouter with asterisk from http://forum.mikrotik.com/t/metarouter-images/28791/1