@startuml
!include skin.inc

autonumber "#'.'"

participant "Server" as srv 
participant "Application" as app 
participant "<i>Browser</i>" as bro #ffffff


app -> srv: PUT VvoipOffer(offerSdp)
alt Alternative 1: synchronous response
	srv --> app: Response with SVC1007
else Alternative 2: asynchronous response
	srv --> app: Response
	srv -> app: POST or NOTIFY VvoipConflictNotification
end
	note over bro, app #ff0000: Ed. Note: application indicates roll back to the browser. Still under discussion in W3C how. \nSolve in CONR.

@enduml