Ericsson RBS 2106 Hardware Reference Manual page 102

Radio Configurations
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The Radio Base Station 2000 (RBS 2000) is Ericsson's second generation of
RBSs developed to meet the GSM specifications for BTSs.
2 References
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GSM Requirements 05.05 phase 2+ Radio
Transmission and Reception.
GSM Requirements 05.08 phase 2+ Radio Subsystem
Link Control.
RBS 2106 and RBS 2206
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