... Cards : GSM(A) and GSM (B), Conveniently choose GSM(A), GSM(B) or PSTN. TM2000D-2 GSM/PSTN Wireless Terminal (FWT 2 GSM + 1 ... GSM(A) and GSM (B),Conveniently choose GSM(A), GSM(B) or PSTNAuto-select Low cost route according settingFive working modes: GSM(A+B),PSTN,PSTN/GSM(A+B),GSM(A),GSM(B ... ≤60dB(A)Atmospheric pressure 86~106kPa IV. GSM ParametersFrequency bands GSM850/900/1800/1900 MHz Frequency ...