c455ip neue firmware ist da

- VoIP Wideband function added (DTMF Outband signalization only). This feature can be used with S67H and SL37H handsets only.
- Line selection via account index added (#0 - #9).
- Dialing Plan added.
- VoIP Call Transfer function added. (Depends on the provider).
- Call rejection via Onhook-Key added.
- IP address exchange via paging call.
- SNTP protocol support added (automatic Time/Date adjustment).
- E-Mail username length is enlarged up to 50 characters (configurable via Web Configurator).
- VoIP Accounts can be stored without user name.
- Info service functionality added e.g. Weather forecast as Screensaver. This feature can be used with C47H, S67H and SL37H handsets only.
- Call Waiting Rejection function added.
- If you try an outgoing call for the first time with a wrongly configured VoIP or Gigaset.net account, you are being asked if you want to start the installation assistant.

Alles wie beim neuen S675IP

Gibt es da auch eine aktualisierte Doku zu? Hört sich ja nach einigen Neuerungen "über der Haube" an, die man konfigurieren kann.

Ich würde dir die Anleitung vom S675IP empfehlen.