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.
Many phone companies offer "cheap" long distance call rates. However, Dukatech goes beyond that, by helping individuals, organizations and business clients get the true value of their money.