AsterNet.ARI external calls

you mean like this?:

var channel =
	Client.Channels.Originate(
		endpoint: "1776", 
		extension: @"PJSIP/66880038@GO_SIP",
		callerId: "12345776");

An endpoint is a Dial string, and an extension is a place in the dialplan. That is what I meant by “the exact values depend”.

“endpoint” may work as Local/1776@default but I have no idea how to dial “66880038” in your dialplan.