Tunnel - Meter reading via GSM data call (CSD) and IP communications (with SSL/TLS security). Incorporation of Device Manager (with SSL/TLS security) for modem management - Webdyn
6NH9720-3AA01-0XX0 MODEM MD720 / GSM / GPRS / 2G- MOBILE RADIO MODEM WITH RS232- INTERFACE / FOR GSM- SERVICES CSD / GPRS / SMS / QUADBAND-GSM / AT COMMAND INTERFACE / PLEASE