A PBX is a company switchboard, that allows everyone in the company to make and receive calls from the same number(s), and transfer and forward calls between each other. NoPBX is a new concept in company switchboards, because: - it works entirely over your existing smartphones; - it uses real GSM calls to connect you, not Voice over Data connections; and - it is simple enough that you can set it up yourself (online on our web site), no technician needed!