... and awake 4.Embed TCP/IP Protocal rs232/rs485 Fiber optical modem support AT command KB3000 GPRS DTU (Data Terminal Unit ... research and developing, embedded 32 bit ARM7-CPU with real-time operating system.l Embedded Watchdog chip, provide multiple Reset mechanism ... , USSD, CSD, Embed TCP/IP Protocol, Support IP address or domain name, Embed TCP/IP Protocol, Support special APN. Size82mm(L ...