To install a new firmware version on a base station and/or handset, please follow the instructions provided in the firmware update guide.
After upgrading to version 450BXX or higher the rollback to version 410BXX or previous is not possible.
After the base upgrade to 450B08 also handsets must be upgraded to the version 450B08.
Please read the release notes carefully before upgrading, some major known issue are present
MAJOR KNOWN ISSUES:
DECT-632: Wrong SIP request URI in Record-Route (strict routing) scenario. This issue is breaking compatibility with 3CX SBC (and other SBCs that require strict routing)
DECT-629: No audio after hold INVITE or reINVITE
Update via http://dect.snom.com
Firmware update server address: https://dect.snom.com
Required version: 450
Required branch: 08 (for the base M700 and M300)
Required branch: 05 (for the handsets M25 M65 M85)