TG400 is usually a compact 4 channels VoIP GSM gateway that connects GSM community with VoIP. it is actually the ideal generation for small and medium-sizedcorporations with weighty burdens of phone calls to mobile https://antonieyc424375.bloggazzo.com/28980950/little-known-facts-about-yeastar-dubai-gsm-gateway-analog-voip-gateway-pbx-module