I have a customer who wants a stand-alone teleconferencing system with local access numbers, customized prompts and branding and is completely separate from their PBX.

Basically "the company" is actually more than a dozen independent companies over eight states and two provinces each doing their own thing IT and telephone wise. But the "head office" assumes certain responsibilities and is trying to get a handle on teleconferencing costs and wishes to do so by hosting their own system after some poor experiences with "value" providers. I have supported their Norstar/CallPilot install for a decade and they came to me with this.

It seems obvious this is something that should be built on a software PBX platform with SIP trunks. But which one? Snom? 3CX? Asterisk? Is there an off-the-shelf appliance solution? (that doesn't cost $40,000).

I have Asterisk and 3CX setup at home with a bunch of Linksys and Yealink phones but I have never actively marketed VOIP anything.

Insights are appreciated,

Gord