I have a remote user with a physical Yealink T46 phone. He can make calls and we can call him using his extension, but when someone is trying to call the que that he is an "agent" in, he is able to answer the call, but unable to hear anything from caller or himself, when he hangs up, the que continues to ring. Seems like his phone can't seem to pick up the call. We have re-provisioned the phone, rebooted it several times. Not sure what else to try.