1.Wireless modem,industrial 2.GSM 900/1800MHz 3.Support SMS,Telephone,CSD ... (RTC)6.Local and remote configuration over the air7.Support Fax:Group 3, Class 1, 28.Support CSD up to 14 ... .4 kbps, USSD, non transparent mode, V.1109.Support SMS:Point-to-point MO and MT SMS ... temperature: -20°C~ +55°CStorage temperature:-50°C~85°Chumidity:≤90% Widely used for your solution,easy for intergration.GSM ...