Open Source - Why Can't I See The Image On My Sangoma Phone?

In Switchvox version 6.6.x.x and higher, if you cannot see the image on your Sangoma phone, follow these steps:
Enable allow insecure SSL under Setup > Manage > click on yellow pencil > Phone Settings tab > Advanced Phone Options > SIP Settings: Allow Insecure SSL set to Yes
Save SIP Extension

Note: In an unsecured SSL environment, phones don’t use the negotiated certificates to validate the host. Please see this article for more detailed information.