I have an Avaya 1608i that is hosted on a remote IPO. This is strictly on a hobbyist system. When I receive a phone call, I get both incoming and outgoing audio to work just fine. But when I place a call, I cannot hear what the other end is saying, nor can they hear me. DTMF does not carry either after the call is placed. My provider has exhausted every possibility on their end, and other users of the same system do not have the same issue as I do on their remote extensions, it seems to be isolated to my network. I have a TP-Link Deco system as my router, and it would appear that the cause of my issues is that. Has anyone else run into this, or can anyone recommend a fix?