AddPac AP-GS1004A is one of the models of inter-network VoIP GSM gateways, through which, it is possible to format a single network unit and to use it for VoIP-telephony, analog communication lines and GSM-network.
VoiceIP-USA Incorporation a company incorporated in USA ,whose registered address is World Trade Centre Delaware, 802 West Street, Suite 105, Wilmington, Delaware 19801