Originally I was trying to use Asterisk 13 but ran into an issue with my Cisco 7960 devices not registering properly where as it works fantastically on v11. I think it has to do with chan_sip being on port 5060 in v11, but in v13 pjsip is on that port. I tried adjusting the ports in the configs but the changes wouldn't stick, and my phones kept wanting to communicate on 5060.
Based on my preliminary look at this issue and adding some debug statements to the config.php file:
$exten = \FreePBX::Core()->getUser(123);
$vm = ((($exten['voicemail'] == "novm") || ($exten['voicemail'] == "disabled") || ($exten['voicemail'] == "")) ? "novm" : $exten['extension']);
echo $vm;When Voicemail is OFF echo $vm will output 123 (my extension). When I turn Voicemail back ON echo $vm will output novm. Considering this appears to be the exact same logic used to write the file (I grabbed it from modules/core/functions.inc.php) it's not a small wonder the settings are't correct inside of the config file.
Seems like a rabbit hole, so I'll give v13 another shot and see if I can get my phones to authenticate properly again.
Thanks for your assistance debugging this problem!