The most expensive GPS-antenna installation ever? Testing multiple GSM-R-rings deep inside a mountain - (PPT)

摘要

Frequency is 876-880 Mhz for the uplink and 921-925 for the Downlink. Roaming to public 900 MHz is designed and possible. Voice group calls. Voice broadcast services. Location dependent addressing. Functional addressing ("follow me"). Enhanced Multi-level Precedence and Preemption.