Voice Mail displayed on T48S?

[nickpl]

As far as I'm aware no VoIP phone maker provides a visual voicemail app on their phones unless the phones are bundled with the SIP server.

Currently there's no Visual Voicemail standard so it's not like Yealink could just add this feature and have it work everywhere, they would have a write hundreds of different apps for every different SIP server in existence.

Yealink provides tools through the XML Browser that companies who make SIP servers can use to develop their own visual voicemail apps.

I'm not familiar with the Auerswald 5500R, so I can't tell you if it's simular or not to Asterisk.