GSM RS232 MODEMS 1.Supports SMS, CSD and Dial-up 2.ideal for industrial automation 3. remote monitoring and control system F1003 GSM MODEM SPECIFICATIONF1003 GSM modem is based on 2G GSM network and adopts industrial wireless GSM module.It supports SMS and CSD function.F1003 GSM modem is designed with industrial standard and has been widely used on finance,water supply,environment protection, ...