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.
A leader of innovation and state of the art solutions for Gateways and SIM Server solutions, locally and internationally to all existing networks GSM/CDMA/UMTS/VoIP