Thank you so much for taking the time to assist me.
So to be clear when I say SSL I meant the certificate on the PBX. Is it a valid cert that doesn’t throw
That is correct.

Do you have the latest versions of the system packages and modules on the phone system? How about the latest firmware on the phones?
I installed the latest firmware 4_13_1 on the phone yesterday.
I update the phone system modules once a month, so they were no more than 1 month old. I just updated the modules and system again for good measure.
Are these phones on the same LAN/VLAN as the phone system?
Yep.
If so you probably don’t want to configure them using option 66 through DHCP. Make sure DPMA Management is properly configured and ensure phones are provisioned using DPMA.
Okay, I made sure it got provisioned using the mDNS Service Name for DPMA Management and I selected that option and it provisioned successfully.
I used these instructions to configure DPMA Management.
It would help if I knew what the phone should look like when working correctly. I wonder where the VM app is normally located on the phone GUI. I haven’t found anything yet to show all that.
For example, is the Advanced setting supposed to be available to users, with the option to Reset to factory defaults without any password prompt?
Actually I would like to know how and where the Voicemail function is on this phone. Maybe it’s working and I just don’t know?
I see a Voicemail button on the Factories menu, but nothing happens when I press it. The Contacts works though.
When I select the Voicemail contact from the Contacts area, I get this:
Do you have any other thoughts on the matter, or should I just contact Sangoma support.
edit: I enabled DPMA logs and I didn’t see anything suspicious in them.
[2023-08-02 10:11:47] Asterisk 18.17.1 built by mockbuild @ jenkins7 on a x86_64 running Linux on 2023-05-08 13:11:35 UTC
[2023-08-02 10:11:47] DPMA[22226] phone_users.c: Reconfiguring triggered by endpoint
[2023-08-02 10:11:47] DPMA[22226] phone_users.c: Sangoma config detected with --phone-passwd-file '/etc/asterisk/dpma/passwords'. Attempting to load file.
[2023-08-02 10:11:47] DPMA[22226] phone_users.c: Successfully loaded phone-passwd-file '/etc/asterisk/dpma/passwords', parsing file.
[2023-08-02 10:11:47] DPMA[22226] phone_users.c: Added 7 users via phone-passwd-file.
[2023-08-02 10:11:47] DPMA[29544] phone_users.c: Reconfiguring triggered by res_digium_phone.conf
[2023-08-02 10:11:47] DPMA[29544] phone_users.c: Sangoma config detected with --phone-passwd-file '/etc/asterisk/dpma/passwords'. Attempting to load file.
[2023-08-02 10:11:47] DPMA[29544] phone_users.c: Successfully loaded phone-passwd-file '/etc/asterisk/dpma/passwords', parsing file.
[2023-08-02 10:11:47] DPMA[29544] phone_users.c: Added 7 users via phone-passwd-file.
[2023-08-02 10:11:47] DPMA[28955] phone_users.c: Reconfiguring triggered by SIP
[2023-08-02 10:11:47] DPMA[28955] phone_users.c: Sangoma config detected with --phone-passwd-file '/etc/asterisk/dpma/passwords'. Attempting to load file.
[2023-08-02 10:11:47] DPMA[28955] phone_users.c: Successfully loaded phone-passwd-file '/etc/asterisk/dpma/passwords', parsing file.
[2023-08-02 10:11:47] DPMA[28955] phone_users.c: Added 7 users via phone-passwd-file.
[2023-08-02 10:11:47] DPMA[29544] phone_users.c: Reconfiguring triggered by Voicemail
[2023-08-02 10:11:47] DPMA[29544] phone_users.c: Sangoma config detected with --phone-passwd-file '/etc/asterisk/dpma/passwords'. Attempting to load file.
[2023-08-02 10:11:47] DPMA[29544] phone_users.c: Successfully loaded phone-passwd-file '/etc/asterisk/dpma/passwords', parsing file.
[2023-08-02 10:11:47] DPMA[29544] phone_users.c: Added 7 users via phone-passwd-file.
[2023-08-02 10:12:05] Asterisk 18.17.1 built by mockbuild @ jenkins7 on a x86_64 running Linux on 2023-05-08 13:11:35 UTC
[2023-08-02 10:12:05] DPMA[22226] phone_users.c: Reconfiguring triggered by endpoint
[2023-08-02 10:12:05] DPMA[22226] phone_users.c: Sangoma config detected with --phone-passwd-file '/etc/asterisk/dpma/passwords'. Attempting to load file.
[2023-08-02 10:12:05] DPMA[22226] phone_users.c: Successfully loaded phone-passwd-file '/etc/asterisk/dpma/passwords', parsing file.
[2023-08-02 10:12:05] DPMA[22226] phone_users.c: Added 7 users via phone-passwd-file.
[2023-08-02 10:12:05] DPMA[30577] phone_users.c: Reconfiguring triggered by res_digium_phone.conf
[2023-08-02 10:12:05] DPMA[30577] phone_users.c: Sangoma config detected with --phone-passwd-file '/etc/asterisk/dpma/passwords'. Attempting to load file.
[2023-08-02 10:12:05] DPMA[30577] phone_users.c: Successfully loaded phone-passwd-file '/etc/asterisk/dpma/passwords', parsing file.
[2023-08-02 10:12:05] DPMA[30577] phone_users.c: Added 7 users via phone-passwd-file.
[2023-08-02 10:12:05] DPMA[28955] phone_users.c: Reconfiguring triggered by SIP
[2023-08-02 10:12:05] DPMA[28955] phone_users.c: Sangoma config detected with --phone-passwd-file '/etc/asterisk/dpma/passwords'. Attempting to load file.
[2023-08-02 10:12:05] DPMA[28955] phone_users.c: Successfully loaded phone-passwd-file '/etc/asterisk/dpma/passwords', parsing file.
[2023-08-02 10:12:05] DPMA[28955] phone_users.c: Added 7 users via phone-passwd-file.
[2023-08-02 10:12:05] DPMA[30577] phone_users.c: Reconfiguring triggered by Voicemail
[2023-08-02 10:12:05] DPMA[30577] phone_users.c: Sangoma config detected with --phone-passwd-file '/etc/asterisk/dpma/passwords'. Attempting to load file.
[2023-08-02 10:12:05] DPMA[30577] phone_users.c: Successfully loaded phone-passwd-file '/etc/asterisk/dpma/passwords', parsing file.
[2023-08-02 10:12:05] DPMA[30577] phone_users.c: Added 7 users via phone-passwd-file.
[2023-08-02 10:12:59] DPMA[32406] phone_message.c: Pruning old session for 'sip:10.3.0.228' on new handshake from mac '000FD3D0CF74'.
[2023-08-02 10:13:49] Asterisk 18.17.1 built by mockbuild @ jenkins7 on a x86_64 running Linux on 2023-05-08 13:11:35 UTC
[2023-08-02 10:13:49] DPMA[1802] phone_users.c: Reconfiguring triggered by endpoint
[2023-08-02 10:13:49] DPMA[1802] phone_users.c: Sangoma config detected with --phone-passwd-file '/etc/asterisk/dpma/passwords'. Attempting to load file.
[2023-08-02 10:13:49] DPMA[1802] phone_users.c: Successfully loaded phone-passwd-file '/etc/asterisk/dpma/passwords', parsing file.
[2023-08-02 10:13:49] DPMA[1802] phone_users.c: Added 7 users via phone-passwd-file.
[2023-08-02 10:13:50] DPMA[1798] phone_users.c: Reconfiguring triggered by res_digium_phone.conf
[2023-08-02 10:13:50] DPMA[1798] phone_users.c: Sangoma config detected with --phone-passwd-file '/etc/asterisk/dpma/passwords'. Attempting to load file.
[2023-08-02 10:13:50] DPMA[1798] phone_users.c: Successfully loaded phone-passwd-file '/etc/asterisk/dpma/passwords', parsing file.
[2023-08-02 10:13:50] DPMA[1798] phone_users.c: Added 7 users via phone-passwd-file.
[2023-08-02 10:13:50] DPMA[28955] phone_users.c: Reconfiguring triggered by SIP
[2023-08-02 10:13:50] DPMA[28955] phone_users.c: Sangoma config detected with --phone-passwd-file '/etc/asterisk/dpma/passwords'. Attempting to load file.
[2023-08-02 10:13:50] DPMA[28955] phone_users.c: Successfully loaded phone-passwd-file '/etc/asterisk/dpma/passwords', parsing file.
[2023-08-02 10:13:50] DPMA[28955] phone_users.c: Added 7 users via phone-passwd-file.
[2023-08-02 10:13:50] DPMA[1798] phone_users.c: Reconfiguring triggered by Voicemail
[2023-08-02 10:13:50] DPMA[1798] phone_users.c: Sangoma config detected with --phone-passwd-file '/etc/asterisk/dpma/passwords'. Attempting to load file.
[2023-08-02 10:13:50] DPMA[1798] phone_users.c: Successfully loaded phone-passwd-file '/etc/asterisk/dpma/passwords', parsing file.
[2023-08-02 10:13:50] DPMA[1798] phone_users.c: Added 7 users via phone-passwd-file.
[2023-08-02 10:14:31] DPMA[3385] phone_message.c: Pruning old session for 'sip:10.3.0.228' on new handshake from mac '000FD3D0CF74'.
[2023-08-02 10:21:44] Asterisk 18.17.1 built by mockbuild @ jenkins7 on a x86_64 running Linux on 2023-05-08 13:11:35 UTC
[2023-08-02 10:21:44] DPMA[15458] phone_users.c: Reconfiguring triggered by endpoint
[2023-08-02 10:21:44] DPMA[15458] phone_users.c: Sangoma config detected with --phone-passwd-file '/etc/asterisk/dpma/passwords'. Attempting to load file.
[2023-08-02 10:21:44] DPMA[15458] phone_users.c: Successfully loaded phone-passwd-file '/etc/asterisk/dpma/passwords', parsing file.
[2023-08-02 10:21:44] DPMA[15458] phone_users.c: Added 7 users via phone-passwd-file.
[2023-08-02 10:21:45] DPMA[17722] phone_users.c: Reconfiguring triggered by res_digium_phone.conf
[2023-08-02 10:21:45] DPMA[17722] phone_users.c: Sangoma config detected with --phone-passwd-file '/etc/asterisk/dpma/passwords'. Attempting to load file.
[2023-08-02 10:21:45] DPMA[17722] phone_users.c: Successfully loaded phone-passwd-file '/etc/asterisk/dpma/passwords', parsing file.
[2023-08-02 10:21:45] DPMA[17722] phone_users.c: Added 7 users via phone-passwd-file.
[2023-08-02 10:21:45] DPMA[28955] phone_users.c: Reconfiguring triggered by SIP
[2023-08-02 10:21:45] DPMA[28955] phone_users.c: Sangoma config detected with --phone-passwd-file '/etc/asterisk/dpma/passwords'. Attempting to load file.
[2023-08-02 10:21:45] DPMA[28955] phone_users.c: Successfully loaded phone-passwd-file '/etc/asterisk/dpma/passwords', parsing file.
[2023-08-02 10:21:45] DPMA[28955] phone_users.c: Added 7 users via phone-passwd-file.
[2023-08-02 10:21:45] DPMA[17722] phone_users.c: Reconfiguring triggered by Voicemail
[2023-08-02 10:21:45] DPMA[17722] phone_users.c: Sangoma config detected with --phone-passwd-file '/etc/asterisk/dpma/passwords'. Attempting to load file.
[2023-08-02 10:21:45] DPMA[17722] phone_users.c: Successfully loaded phone-passwd-file '/etc/asterisk/dpma/passwords', parsing file.
[2023-08-02 10:21:45] DPMA[17722] phone_users.c: Added 7 users via phone-passwd-file.
[2023-08-02 10:23:17] DPMA[20841] phone_message.c: Pruning old session for 'sip:10.3.0.228' on new handshake from mac '000FD3D0CF74'.
[2023-08-02 10:28:35] DPMA[28914] phone_avahi.c: Could not create Avahi client.
[2023-08-02 10:31:59] Asterisk 18.19.0 built by mockbuild @ jenkins7 on a x86_64 running Linux on 2023-07-24 11:33:46 UTC
[2023-08-02 10:32:00] DPMA[2797] phone_crypto.c: Invalid character in hex string 'G'
[2023-08-02 10:32:00] DPMA[2797] phone_users.c: Reconfiguring triggered by SIP
[2023-08-02 10:32:00] DPMA[2797] phone_users.c: User SIP settings missing or invalid
[2023-08-02 10:32:00] DPMA[2797] phone_users.c: Reconfiguring triggered by User SIP
[2023-08-02 10:32:00] DPMA[2797] phone_users.c: Reconfiguring triggered by Voicemail
[2023-08-02 10:32:00] DPMA[2797] phone_users.c: Reconfiguring triggered by res_digium_phone.conf
[2023-08-02 10:32:00] DPMA[2797] phone_users.c: Sangoma config detected with --phone-passwd-file '/etc/asterisk/dpma/passwords'. Attempting to load file.
[2023-08-02 10:32:00] DPMA[2797] phone_users.c: Successfully loaded phone-passwd-file '/etc/asterisk/dpma/passwords', parsing file.
[2023-08-02 10:32:00] DPMA[2797] phone_users.c: Added 7 users via phone-passwd-file.
[2023-08-02 10:32:00] DPMA[2797] phone_users.c: Reconfiguring triggered by SIP
[2023-08-02 10:32:00] DPMA[2797] phone_users.c: Sangoma config detected with --phone-passwd-file '/etc/asterisk/dpma/passwords'. Attempting to load file.
[2023-08-02 10:32:00] DPMA[2797] phone_users.c: Successfully loaded phone-passwd-file '/etc/asterisk/dpma/passwords', parsing file.
[2023-08-02 10:32:00] DPMA[2797] phone_users.c: Added 7 users via phone-passwd-file.
[2023-08-02 10:32:01] DPMA[2797] phone_users.c: Reconfiguring triggered by Voicemail
[2023-08-02 10:32:01] DPMA[2797] phone_users.c: Sangoma config detected with --phone-passwd-file '/etc/asterisk/dpma/passwords'. Attempting to load file.
[2023-08-02 10:32:01] DPMA[2797] phone_users.c: Successfully loaded phone-passwd-file '/etc/asterisk/dpma/passwords', parsing file.
[2023-08-02 10:32:01] DPMA[2797] phone_users.c: Added 7 users via phone-passwd-file.
[2023-08-02 10:32:02] DPMA[2797] phone_users.c: Reconfiguring triggered by identifier load
[2023-08-02 10:32:02] DPMA[2797] phone_users.c: Sangoma config detected with --phone-passwd-file '/etc/asterisk/dpma/passwords'. Attempting to load file.
[2023-08-02 10:32:02] DPMA[2797] phone_users.c: Successfully loaded phone-passwd-file '/etc/asterisk/dpma/passwords', parsing file.
[2023-08-02 10:32:02] DPMA[2797] phone_users.c: Added 7 users via phone-passwd-file.
[2023-08-02 10:32:02] DPMA[2876] res_digium_phone.c: Digium Phone Module Started
[2023-08-02 10:35:35] DPMA[5970] phone_message.c: Pruning old session for 'sip:10.3.0.228' on new handshake from mac '000FD3D0CF74'.