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.
TalkFree provides VoIP products to make high quality, low cost communications around the world. Our products support PC, Landline, ATA, and a wide variety of Mobile phones including Nokia, iPhone, and Android