... four itmes,different item different function and of course different price,we have wavecom modem with Q2303,Q2403,Q2406,Q24Plus. Q2303 support ... SMS,MMS,FAX,WEB,JAVA MC52i dual band 900/1800Mhz,support SMS,MMS,FAX,WEB,TCP/IP,JAVA MC55 three-band, ... Support SMS,MMS,WAP,GPRS,FAX,Voic,AT command,TCP/IP stackMulti-socket GSM GPRS 16 ports modem poolProducts FeaturesJust like eight single-channel equipments ...