The GSM module is a GSM terminal for transmitting data, faxes and SMS (short message service) text messages in GSM networks (GSM = global system for mobile communication). The GSM Module M1 comprises the following components: • GSM transceiver; • Data and power supply unit; • Serial interface (V.24) for data transmission and control; • Manufacturer-specific interface for DC power supply, external antenna and audio signals. When the GSM Module M1 is registered in the network, it serves as a standard modem for fax and data transmission for a computer connected to the V.24 interface. Special AT+C commands as per GSM 07.07 or GSM 07.05 for controlling GSM-related functions (PIN entry, network selection, etc.) and for the short message service are available via the V.24 interface. The GSM Module M1 offers the following features: • Transparent data transmission at 2400, 4800 and 9600 bps (BS24,25,26); • Group 3, Class 2 fax transmission conforming to TR-29.2 at 2400, 4800, 7200 and 9600 bps; • Short message service mobile originated (SMS MO, TS22) • Short message service mobile terminated (SMS MT, TS21) The GSM Module M1 conforms to GSM standards. However, note that the device can still emit radiation and therefore must not be used or even switched on in certain environments. • Leaving the GSM Module M1 switched on in airplanes is prohibited by law. • The module must not be used near service stations, fuel depots, chemical plants or blasting operations. • The module may also interfere with the functioning of electronic medical devices (hearing aids, pacemakers, etc.) that are not properly shielded. In case of doubt, consult your physician. Do not touch the antenna during a call. • Using the GSM Module M1 in the direct vicinity of electronic devices (radios, televisions,PCs, etc.) can cause slight interference. www.m448中国最大的资料库下载