Industrial 4G M2M DTU with RS-232 interface. Network support: 2G (GSM), 2.5G (GPRS), 2.75G (EDGE), 3G (WCDMA), 4G (HSPA+, LTE). The product has been discontinued. The offer includes a product with similar parameters: GTM-203M-3GWA CR.Industrial high-performance embedded processor, CPU with MMU memory management unit to prevent memory overflow.Functions:Remote wakening: support the wakening ways like SMS, voice, data and disconnection overtim..