Switchvox - What Codecs can be used with Switchvox softphone app

Switchvox Softphone for iOS and Android supports G711 (U-Law, A-Law). These codecs must be enabled in the Phone section in the extension setting page, otherwise calls will fail due to incompatible codec. 

Switchvox Desktop Softphone for Windows and macOS uses Opus;U-Law. That cannot be modified in the extension's Phone Settings.