T54W , EXP50, mobile Account, & DSS Keys

[wireless-dj]

Hello,

I have a Yealink T54W, and my iPhone connected as a mobile device account via Bluetooth.
This works pretty well so far. Incoming calls and outgoing calls are fine.

I would now like to tell the Yealink that there are some numbers from the directory, or preferably via the DSS keys of the extension module always via the mobile device account line should be dialed out. But neither with the directory, nor with the DSS extension can this account can be selected.

I cannot imagine that this should not be possible.
Surely I have not activated something in the configuration.

Can you please tell me something about this?

Thank you & best Regards from Germany,

Volker Schaefer