Good afternoon all. I had initially opened this as a bug for the FPBX 13 RC, but was told this wasn’t a bug at all and that I clearly need assistance from support or the forum. Personally, I don’t believe that’s true, but hey, I’m game - because this is just too weird. So, here goes:
Endpoints are Grandstream 3240/3275/2140 sets. Phone configs haven’t been modified from old FPBX system (no tweaks to the SIP settings).
We are using PJSIP for the endpoint drivers.
Phones calling something as simple as voicemail hear nothing (but they can transmit sound - so they can leave a voicemail). This 1-way audio is also occurring on inbound/outbound external calls. Station to station calling works fine (but paging does not). Dialing a feature code also is silent (no prompts, no beep).
I was able to narrow it down to having G722 permitted for the endpoints. When G722 is allowed, we get 1-way audio, when its disallowed (removed from allowed list), we get 2-way audio (granted, at the next codec in line - 711u/PCMU).
Since this wasn’t an issue on FPBX12 with the PJSIP driver, I’m very much inclined to say this should be classified as a bug, but my ticket was abruptly closed.
Phones and system are on the same subnet, so no firewall blockage or anything like that (and again, phones worked fine on FPBX12/PJSIP with g722).
Does anyone have any thoughts on how I could have possibly screwed up a fresh install to create 1-way audio directly into the system (where STUN/NAT isn’t in the mix)?