astTECS Mini PBX : The world’s smallest IP PBX *ast Mini IPPBX is the *asterisk based IPPBX which support 16 Subscribers. *astTECS Mini PBX which is the new generation technology in PBX world and also used widely in developed countries, Mini IPPBX to help you easily transition from simple telephony to feature-rich UC solution. Connect with various interfaces and *astTECS IPPBX will connect all your remote offices through VOIP.