I just purchased a Sangoma s406 phone so I can easily use VPN to access my server from anywhere (due to current virus circumstances).
I thought I had everything working, except I cannot access my voicemail.
When I tail /var/log/asterisk/full it is showing that asterisk is receiving ‘’ (no numbers).
I can dial voicemail from my Polycom phone and it works fine. Also my older s405 phone can access voicemail.
The Sangoma phones are connected to freepbx via VPN. Phones connecting with PJSIP.
Freepbx is latest version (12.7.6-2002-2.sng7) running asterisk 15.7.3.
Interesting - I change the older working Sangoma phone to VPN and it stops working too. I disable the VPN on the new phone and it works.