After firmware update over Connection -> FLASH update -> ISDN FLASH download is neither a Local nor an ISDN download of the configuration possible. Why?
This can happen if the software structure was changed by the FLASH download. The ISDN Flash download will be finished only after the reset call. You might: 1. After firmware download wait for reset call from dialer (Can last some minutes). 2. Over Tools -> Database management start the Update DB from userstring. 3. Prepare a new Konfig.bin. 4. ISDN download repeat.