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Published Date: 01 June 2019

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


  • 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

  • Firmware update server address:
  • Required version: 450
  • Required branch: 08 (for the base M700 and M300)
  • Required branch: 05 (for the handsets M25 M65 M85)

Binaries download

  • M700  SHA-256: 3bbaa35807d0245691d8712ba2a5e348f5acf33d4d09d3f4b9b49ed521193a90
  • M300  SHA-256: a101956a2d6dddfc862727a84fdfdc9ce7302ce0193473375154fc6e411fc8d5
  • M85    SHA-256: cc8f22654f2faf6f7dc4e14b0168545526e9343506657287d259e521cf766d14
  • M65    SHA-256: 6c07195c9c116d76076be0cf910ccb56e5b791b0f17d26a0cdbcbd0099c73d07
  • M25    SHA-256: ad97f4f9d9df40f7bf75494089682021cf849b72e31e8660d322ffa7af788740
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