I'm new to 3cx. Using free hosted pbx version. I am trying to place an intercom call to a Fanvil 4X phone by dialing *9 + Extn. Error I am getting is: "02/19/2018 7:21:06 AM - [Flow] Target endpoint for *9222 can not be built!" In other threads I read that there should be a dial code in for *9 but I don't see that listed with the other dial codes.