Starting yesterday afternoon, I have 2 sites that have grand stream phones connected to cloud based Free PBX and outbound or “internal” extension calls are unable to be made…I have attached a trace showing me making an inbound call and answering. I then try to make an outbound (both calls to 701.212.5263) and it fails…I then make an internal call using Bria soft phone “internally” from extension 15 to 11, and it works inbound on 11 (grand stream phone), but I can’t call outbound on the grand stream phone.
It appears this is an issue related to grand stream hardware, as the Bria soft phone has no issues.
Here’s a link to the PCAP