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#This is the default signalling chart
#Edit and press Ctrl+W to see the result
#You can change the default chart
#in the Edit|Preferences... menu.
UA_A,MTAS[pos=0.8],UA_C [pos=0.4],OCS[pos=0.4];
UA_A->MTAS:INVITE(SDP1);
activate MTAS;
MTAS->OCS:CCR(Initial Request, A->B);
MTAS--MTAS:10;
MTAS->UA_A:100 Trying;
deactivate MTAS;
OCS ->MTAS:CCA(Initial Request, A->B);
activate MTAS;
MTAS->UA_A:181 Call is being forwarded;
MTAS--MTAS:20;
MTAS->OCS:CCR(Initial Request, B->C);
deactivate MTAS;
OCS ->MTAS:CCA(Initial Request, B->C);
activate MTAS;
MTAS->UA_C:Invite(SDP1);
MTAS--MTAS:30;
deactivate MTAS;
UA_C->MTAS:180 Ringing;
activate MTAS;
MTAS->UA_A:180 Ringing;
MTAS--MTAS:40;
deactivate MTAS;
UA_C->MTAS:200 OK(INVITE)(SDP2);
activate MTAS;
MTAS->OCS:CCR(Update Request, B->C);
MTAS--MTAS:50;
deactivate MTAS;
OCS ->MTAS:CCA(Update Request, B->C);
activate MTAS;
MTAS->OCS:CCR(Update Request, A->B);
MTAS--MTAS:60;
deactivate MTAS;
OCS->MTAS:CCA(Update Request, A->B);
activate MTAS;
MTAS->OCS:200 OK(INVITE)(SDP2);
MTAS--MTAS:70;
deactivate MTAS;
UA_A->MTAS:ACK;
activate MTAS;
MTAS--MTAS:80;
MTAS->OCS:ACK;
deactivate MTAS;
UA_A->MTAS:BYE;
activate MTAS;
MTAS->OCS:BYE;
MTAS->OCS:CCR(Termination Request, A->B);
MTAS--MTAS:90;
MTAS->OCS:CCR(Termination Request, B->C);
deactivate MTAS;
OCS->MTAS:CCA(Termination Request, A->B);
activate MTAS;
MTAS--MTAS:100;
deactivate MTAS;
OCS ->MTAS:CCA(Termination Request, B->C);
activate MTAS;
MTAS--MTAS:110;
deactivate MTAS;
UA_C->MTAS:200 OK(BYE);
activate MTAS;
MTAS->UA_A:200 OK(BYE);
MTAS--MTAS:120;
deactivate MTAS;
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