2 GSM module applies to CooVox-U50/U80/U100 IP Phone System. The Module is Designed with quad-band GSM engine SIM900 for global market Inter operable Modules: 4FXO ,4FXS ,2FXOS ,4BRI ,1E1/T1(PRI). Supported Protocol: Voice (2G) and SMS Accessible through Asterisk 1.8x LED indicators for status visibility of the Network Dimension : 88.5 x 132 mm Power supply : Single supply voltage 3.4V-4.5V Frequency Bands : GSM 850, EGSM 900, DCS 1800, PCS 1900. The SIM900 can search the 4 frequency bands automatically. Compliant to GSM Phase 2/2+ Transmitting power :Class 4(2W) at GSM 850 and EGSM 900 Class 1(1W) at DCS 1800 and PCS 1900
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