This is definitely the best way. Set up an asterisk box either at your location, or better yet, in a datacenter and then get a sip provider like http://www.broadvoice.com/.
They can give you local numbers all over the world and you can then grow your asterisk install with your business to as many inbound numbers and extensions as you need.
It takes about a week for the average geek to install and grok asterisk but it is well worth the effort.
They can give you local numbers all over the world and you can then grow your asterisk install with your business to as many inbound numbers and extensions as you need.
It takes about a week for the average geek to install and grok asterisk but it is well worth the effort.