PBX Systems made by Grandstream
Grandstream UCM6208 IP PBX 8FXO, 2FXS Appliance
Grandstream UCM6116 Innovative IP PBX Appliance
Grandstream UCM6204 IP PBX with 4 FXO and 2 FXS Ports
Grandstream UCM6202 IP PBX 2-Port
Grandstream UCM6108 IP PBX Appliance