TCP/IP stack Hispeed 4800SMS/H Germany Cinterion core module built-in 8 GSM / GPRS MODEM, 1U high standard 19 "chassis GSM/GPRS 8 Ports Modem Pool Cinterion TC55I TCP/IP Protocol &AT Command Modules NomuberFuctionFrequency(MHz)Cinterion Modules TC35/MC368 SMS900/1800TC35I/MC35I/MC39ISMS,MMS,TCP/IP Protocol900/1800MC52I/MC37ISMS,MMS900/1900 MC388/MC389 SMS,MMS900/1800 MC55I SMS,MMS,TCP/IP ...