As a Gigaset installer and reseller, we had the pleasure of testing the Gigaset PRO T300 for you. In short, this Gigaset IPBX is designed for small and medium-sized businesses: – server license and 5 user licenses included – up to 15 registered users and up to 15 simultaneous calls – calls via IP, analog line and ISDN – simple web administration Details about this Gigaset PBX