German: GSM-Basic
Japanese: GSM-Basic

Communications engineering. GSM modulation scheme similar to GSM-217 except that every 26th frame is idle (the last of a multiframe). The characteristics are amplitude modulated by rectangular pulses with a pulse width of 0.576 ms, a repetition frequency of 217 Hz, a duty cycle of 1:8 and basic time division multiple access frame with every 26th frame idle.

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