I’m investigating using Asterisk as a PBX for a new office I’m involved with setting up. I’m currently interested in using a VoIP service provider for all outgoing and incoming calls. In looking at some of the plans they all seem to limit you to a maximum of 4 simultaious calls per account. Our office could potentially have 25+ people with more then 4 people on the phone at any one time. How could I address this?