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path: root/doc/manuals/images/sgs-mt_sms_idle.msc
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msc {
	hscale=2;
	UE, MME, VLR [label="MSC/VLR"], HSS [label="HSS/HLR"], SMSC;

	UE box HSS	[label="EPS/IMSI attach procedure"];
	...;

	VLR <= SMSC	[label="MAP/GSUP ForwardSM"];
	MME <= VLR	[label="SGsAP PAGING"];
	UE <= MME	[label="Paging"];
	UE box MME	[label="Service Request"];
	MME => VLR	[label="SGsAP SERVICE REQ"];
	MME <= VLR	[label="SGsAP DL UNITDATA\n(CP-DATA/RP-DATA/TPDU)"];
	UE <= MME	[label="DL NAS Transport"];
	UE => MME	[label="UL NAS Transport"];
	MME => VLR	[label="SGsAP UL UNITDATA"];
	...;
	UE => MME	[label="UL NAS Transport"];
	MME => VLR	[label="SGsAP UL UNITDATA"];
	VLR => SMSC	[label="Delivery report"];
	MME <= VLR	[label="SGsAP RELEASE REQ"];
}