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msc {
bts [label="Baseband Transceiver"], bsc [label="BSC"];
--- [label="Initial state after establishing OML"];
bts => bsc [label="STATE CHG REP (Disabled/Notinstalled/Locked)"];
--- [label="MO requests software activation"];
bts => bsc [label="SW Activate Req"];
bts <= bsc [label="SW Activate Req Ack"];
--- [label="BTS instructs BTS to activate software"];
bts <= bsc [label="Activate SW"];
bts => bsc [label="Activate SW Ack"];
--- [label="MO reports new state after SW activation"];
bts => bsc [label="STATE CHG REP (Disabled/Dependency)"];
bts => bsc [label="SW Activated Report"];
--- [label="BSC requests RSL establishment"];
bts <= bsc [label="IPA RSL Connect"];
bts => bsc [label="IPA RSL Connect ACK"];
bts <= bsc [label="OPSTART"];
bts => bsc [label="OPSTART ACK"];
--- [label="As this object is locked, we need to unlock it"];
bts <= bsc [label="Change Adm State (Unlocked)"];
bts => bsc [label="Change Adm State Ack (Unlocked)"];
bts => bsc [label="STATE CHG REP (Disabled/Dependency/Unlocked)"];
}
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