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GSM standard
commun. GSM-Standard (European digital mobile RT standard, 900 MHz band, uplink 890-915 MHz, downlink 935-960 MHz, channel bandwidth 200 kHz, 124 carrier frequencies in each direction, 8 full-duplex voice channels per pair of carrier frequencies, TDMA channel access, FDMA access to pair of carriers, voice transmission RPE/LPE coded, GMSK modulation, s. 'D-Netz')