I would like to know if I can purchase 5 inbound home SIP lines from lets say Vonage only for now. Tell all my customers for my SOHO(Small Office Home Office) business only one phone number and config Asterisk so that this one phone number is never busy unless all 5 phone numbers are busy. I would normally call this an inbound trunk roll-over. Now I know usually you buy these from phone companies but I was hoping that there was a way to have Asterisk handle this? I can dream up an idea for how Asterisk might do it. Asterisk could recieve call on line 1 from Vonage and three way the call to line 2, then transfer the call to line 2, and have line 1 hang up.
Any help would be great.