digraph {
	rankdir=LR;

	subgraph cluster_0 {
		label="Data Center";
		SIM0 [shape=rect];
		SIM1 [shape=rect];
		SIM2 [shape=rect];
		SIM3 [shape=rect];
		SIM4 [shape=rect];
		SIM5 [shape=rect];
		SIM6 [shape=rect];
		SIM7 [shape=rect];
		sysmoOCTSIM [shape=rect];
		{
			rank=same;
			bankd [label="remsim-bankd"];
			server [label="remsim-server"];
		}

		SIM0 -> sysmoOCTSIM [label="ISO-7816-2/3",dir=both];
		SIM1 -> sysmoOCTSIM [label="ISO-7816-2/3",dir=both];
		SIM2 -> sysmoOCTSIM [label="ISO-7816-2/3",dir=both];
		SIM3 -> sysmoOCTSIM [label="ISO-7816-2/3",dir=both];
		SIM4 -> sysmoOCTSIM [label="ISO-7816-2/3",dir=both];
		SIM5 -> sysmoOCTSIM [label="ISO-7816-2/3",dir=both];
		SIM6 -> sysmoOCTSIM [label="ISO-7816-2/3",dir=both];
		SIM7 -> sysmoOCTSIM [label="ISO-7816-2/3",dir=both];

		sysmoOCTSIM -> bankd [label="USB CCID",dir=both];

		bankd -> server [label="RSPRO/IPA/TCP"];
	}

	subgraph cluster_1 {
		label="Remote Site A";
		client1 [label="remsim-client"];
		SIMtrace1 [label="SIMtrace2\nAPP=cardem",shape=rect];
		Phone1 [label="Phone/Modem",shape=rect];
		client1 -> SIMtrace1 [label="USB",dir=both];
		SIMtrace1 -> Phone1 [label="ISO-7816-2/3",dir=both];
		bankd -> client1 [label="RSPRO/IPA/TCP/IP",dir=both];
		client1 -> server [label="RSPRO/IPA/TCP"];
	}

	subgraph cluster_2 {
		label="Remote Site B";
		client2 [label="remsim-client"];
		SIMtrace2 [label="SIMtrace2\nAPP=cardem",shape=rect];
		Phone2 [label="Phone/Modem",shape=rect];
		client2 -> SIMtrace2 [label="USB",dir=both];
		SIMtrace2 -> Phone2 [label="ISO-7816-2/3",dir=both];
		bankd -> client2 [label="RSPRO/IPA/TCP/IP",dir=both];
		client2 -> server [label="RSPRO/IPA/TCP"];
	}


}