GSM
Free GSM Protocol Stack Introduction
GSM Protocol Stack explained Protocol Stack GSM Layer 1 Radio Transmission GSM900 Upstream : 890 ~915 Mhz Downstream : 935 ~ 960 Mhz Duplex Interval : 45 Mhz Bandwidth : 25 Mhz Frequency Interval : 200 Khz TDM / FDMA Modulation – GMSK GSM Layer 2 – Data Link Layer Read more…