- GSM 850/1900Mhz FWT; -Connect with phone set,PBX; -With LCD to show calling ID; -Suport G3 Analog F,battery. 900/ ... 1800MHz GSM FWT1803B ,with G3 Fax and LCD DisplayMain Function1. Network ,GSM/GPRS 850/1900MHz2. G3 Analog Fax ... for making & answering calls after connection to telephone set.3. LCD Display Time,Power, Phone number, Battery, Network, Working and Signal Intensity ...