Hi, We're currently leasign some space on a telco service provider that runs on PortaOne. But PortaOne is rather expensive. Can Elastix do the following: We want a system where we can add our customers. This would be a group. In this group, you have internal users, who have internal numbers (ext). E.g. 101, 102, etc. But since there are concurrent groups, a user in Group A might use 101, but a user in group B (for that group) also. Is this possible with Elastix? Basically, I want to create a SIP dialing gateway/relay server for all my customers.