I have just installed Freepbx 220.127.116.11 on my network all local ext are working.
But I have 4 external ext coming in over the internet, Thay are shown as loged in and I can all to and from them ok.
But the is no voice on the channel.
When you pick up the phone you get a tone call the number and the ext rings but when you answer the phone the line is connected but dead.
I am using the grandstream 486 ata.