msc { | |
hscale=2; | |
UE, ENB [label="eNodeB"], BSS, MME, VLR [label="MSC/VLR"], PSTN; | |
VLR <= PSTN [label="ISUP IAM or SIP INVITE"]; | |
MME <= VLR [label="SGsAP PAGING REQUEST"]; | |
ENB <= MME [label="Paging"]; | |
UE <= MME [label="Paging"]; | |
UE => MME [label="Extended Service Req"]; | |
MME => VLR [label="SGsAP SERVICE REQUEST"]; | |
ENB <= MME [label="Initial UE Ctx Setup"]; | |
UE => BSS [label="Paging Response"]; | |
BSS => VLR [label="COMPL L3 (PAGING RESP)"]; | |
UE <=> VLR [label="Normal 2G Voice Call"]; | |
} |