28 lines
857 B
Plaintext
28 lines
857 B
Plaintext
msc {
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hscale="1.2";
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bsc [label="BSC"], bts [label="BTS"], pcu [label="PCU"], sgsn [label="SGSN"];
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|||;
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bts box bsc [label="A-bis OML connection"];
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bsc => bts [label="Set OML Attrbibutes (NSVC,CELL)"];
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bts rbox pcu [label="PCU Unix Domain Socket"];
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pcu => bts [label="connect to PCU socket"];
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pcu <: bts [label="Config. parameters"];
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pcu rbox pcu [label="bind/connect UDP socket"];
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pcu note sgsn [label="NS-over-IP (UDP port 23000)"];
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pcu => sgsn [label="NS RESET"];
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pcu <= sgsn [label="NS RESET ACK"];
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...;
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pcu => sgsn [label="NS UNBLOCK"];
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pcu <= sgsn [label="NS UNBLOCK ACK"];
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pcu box sgsn [label="NS link established"];
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...;
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pcu => sgsn [label="BVC RESET"];
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pcu <= sgsn [label="BVC RESET ACK"];
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...;
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pcu => sgsn [label="BVC UNBLOCK"];
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pcu <= sgsn [label="BVC UNBLOCK ACK"];
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pcu box sgsn [label="BSSGP link established"];
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|||;
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}
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