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FOSS in the Mobile World
GSM A-bis interface


BSC <-> BTS Interface
is called A-bis
has the following control layers on E1 TS1
L2ML (Layer 2 Management)
TEI management similar to ISDN
OML (Organization & Maintenance)
System parameters, events
RSL (Radio Subsystem Layer)
has encoded voice data (TRAU frames) on other E1 TS

personal git repositories of Harald Welte. Your mileage may vary