Yealink T21P E2 - Specific one way audio issue

[cynjut (Dave Burgess)]

Check this out and see if it sounds familiar.

FPBX13 RC, G722 and 1-way audio - even to voicemail

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…