Hello, I am having an issue faxing using a grandstream 286 ATA. Whenever I send or receive a fax, I get a communication error. I have contacted Broadvox (my provider) and they took a packet capture and said that my system is responding with a media port of "0" which they said will shut down the media stream, and that I need to change my media port. I am not really sure what they are talking about, or where to change my media port. Any ideas? Thanks in advance.