GSM 1800

German: GSM-1800
Japanese: GSM 1800

Communications Engineering. In 1991, extension of the GSM standard of the second generation of mobile communication systems into the 1800 MHz frequency range took place. Since 1995, short message service (SMS) and further data transmission services are open to customers in the GSM standards. Frequencies from 1710 MHz - 1785 MHz are used for the uplink and frequencies from 1805 MHz - 1880 MHz for the downlink.

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