Looks like those bulk sms ‘gateway’ boxes sold on Ali etc: https://ejointech.shop/products/ejointech-4g-16-port-gsm-voip-gateway-256-sim-goip-gsm-gateway-sim-bo

Looks like those bulk sms ‘gateway’ boxes sold on Ali etc: https://ejointech.shop/products/ejointech-4g-16-port-gsm-voip-gateway-256-sim-goip-gsm-gateway-sim-box-voice-sip-gateway https://ejointech.shop/products/ejointech-4g-16-port-gsm-voi... Edit: removed tracking id