Hello I am a VoIP Engineer with more than 10 years of expertise in the field, i have worked with Asterisk and FreeSwitch based PBX Systems like: GOiP, Portech, Dinstar, FusionPBX, FreePBX, VitalPBX, 3CX, Cisco UCM, Grandstream and many more. i can help you configure and setup the PBX to suit your needs in now time, i can also offer support once needed.
if you are interested to talk regarding this please hit me on chat or skype: montana3601
Best Regards.