Installing IP PBX for companies and institutions Extending internet network cables, installing internet boosters Installing IP phones, installing Grandstream PBX Features of IP PBX Hua PBX is an internal PBX that facilitates communication with employees. An landline can be used to receive external calls from other companies. It supports call center and you can use a voice message to help the caller choose the direct department #IP_phones #Internal_PBX #IP_PBX #Grandstream_phones #IP_PBX #