I have a client who pushed out some “updated” firmware to his users’ Aastra 6867i phones. Since then, if the user does not have a VM, and they press the “Voicemail” button on their phone, the screen says “Cannot Display” and then goes back to the main screen.
If there is a VM on their phone, then it works as normal.
Prior to this, if there was no VM and the user hit the “Voicemail” button, they would just get a screen that didn’t list any VMs, but they could still access their Settings (change greetings, etc.)
I am not able to connect a phone remotely to their system to test from that perspective, but I have connected my test 6867i phone to another client’s FreePBX system (same version) and cannot replicate the issue. I even “upgraded” my phone with the same firmware version this particular client pushed out.
So, it doesn’t look like an issue with the firmware but rather something system-side.
Any ideas what could be causing this?