Uniphone Telecommunication is an experienced specialized manufacturer in producing & design the analog/digital telephone system and VOIP products for 20years . All our digital PBX may install the optional IP-trunk card that may let customer make the IP call very easily. We understand that maintenance also a part of cost. If you are looking for a 100% Taiwan made pbx with full business functions, reliable & stable quality and flexible technical support, you should contact with us.