[c-nsp] cisco cube or a solution based on asterisk?

[luismi]

Hi all,

I would like to deploy a VoIP PBX here with also SIP trunk options to
multiple VoIP Providers.

As far as I know Cisco Cube just support 1 SIP Trunk -I thought to
remember that in one version out there it supported more but I didn't
find that information again so maybe I am wrong about it-

The idea is...
 - Provide SIP services here to several offices
 - Have options to have SIP trunks to several providers depending the
destination number
 - Provide advanced services as: voicemail, IVR....

Is anyone here doing that or something similar?
I would like also to know if anyone here is using an astekisk PBX
solution -it must have also commercial support in the background-