32 lines
1.1 KiB
Plaintext
32 lines
1.1 KiB
Plaintext
msc {
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hscale=2;
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bsc[label="BSC"], stp[label="STP"], _msc[label="MSC"];
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|||;
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||| [label="We assume the MSC is already well connected to the STP and MGW(CN)"];
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--- [label="SCTP/IP level establishment"];
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bsc =>> stp [label="SCTP INIT"];
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bsc <<= stp [label="SCTP INIT_ACK"];
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bsc =>> stp [label="SCTP COOKIE_ECHO"];
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bsc <<= stp [label="SCTP COOKIE_ACK"];
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||| [label="SCTP payload can now be carried over the link"];
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|||;
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|||;
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--- [label="M3UA level establishment (over SCTP)"];
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bsc =>> stp [label="M3UA ASPUP"];
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bsc <<= stp [label="M3UA ASPUP_ACK"];
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bsc =>> stp [label="M3UA ASPAC (routing context)"];
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bsc <<= stp [label="M3UA ASPAC_ACK (routing context)"];
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bsc <<= stp [label="M3UA NTFY (AS-ACTIVE)"];
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||| [label="M3UA payload can now be carried over the link"];
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|||;
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--- [label="BSSMAP level establishment (over SCCP/M3UA/SCTP)"];
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bsc =>> _msc [label="BSSMAP RESET (OPC=BSC, DPC=MSC)"];
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bsc <<= _msc [label="BSSMAP RESET ACK (OPC=MSC, DPC=BSC)"];
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||| [label="BSSMAP connection-oriented data can now be exchanged"];
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|||;
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--- [label="Repeat BSSMAP level establishment (to other MSCs in the pool)"];
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|||;
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}
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