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The current Sangoma (Digium) D-Series phones and the Switchvox Mobile App use an SSL certificate to encrypt phone configuration messages which will expire on May 28th, 2021. Unless the upgrade instructions below are followed, the phones and app will no longer be able to get configuration information from Asterisk, FreePBX, PBXact, and Switchvox and will not be usable after that date.

Who is affected:

All Asterisk based systems (Asterisk, FreePBX, Switchvox, PBXact, etc) using D-Series phones or the Switchvox Mobile App with DPMA.

Affected DPMA Versions

Any System running DPMA versions older than the following are affected:

  • DPMA 3.4.13 for Asterisk 11, 13, 15, 16
  • DPMA 3.5.7 for Asterisk 13, 15, 16, 17, 18
  • DPMA 3.6.2 for Asterisk 13, 16, 17, 18

How to Resolve


Visit the DPMA Downloads page, navigate to the folder appropriate for your version of Asterisk and architecture, and download the appropriate DPMA tarball. Follow the included installation instructions.

When Building/Installing Asterisk

Under the "Resource Modules" section of menuselect (or cmenuselect), select "res_digium_phone" under "External Modules".  When you next run make install the latest DPMA version will be automatically downloaded and installed.


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