Documentation about custo.manifest

Hello,

I am looking for a really detailed documentation about custo.manifest file allowing a telephony-computer integration via Rainbow.

This page allowed me to make some conclusive tests, but I would like to go further.

Is it possible for the action to take place after the call is answered? And not on every call?

My custo.manifest file :

{
	"version" : "1",
	"extension-points" : {
		"on-incoming-pbx-call-actions" : [
			{
				"name" : "actionIn",
				"command" : {
					"url" : "C:\Program Files (x86)\Microsoft Office\root\Office16\EXCEL.EXE",
					"params" : "C:\Rainbow\${caller.phoneNumber}.xlsx"
				}
			}
		]		
	}
}

Regards
Paul