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Features : - The Siemens SIM900B is a standard AT commands based GSM module, it support GPRS communication. - The SIM900B module is AT command controlled GSM modem, via serial port RS232 TTL communication. - Frequency bands: 900MHz ,1800MHz,
Direct routing between IP and GSM network without using the FXO port or PSTN network any more. Witura’s VOIP GSM gateway is a professional, heavy duty gateway with either 32 ports, suitable for terminating low and high volumes of mixed call
Direct routing between IP and GSM network without using the FXO port or PSTN network any more. Witura’s VOIP GSM gateway is a professional, heavy duty gateway with either 8 ports, suitable for terminating low and high volumes of mixed call
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