The Digium Phone Module for Asterisk or DPMA for short is an Asterisk software module that provides a secure communications channel between D-Series phones and Asterisk. This secure channel is used to ensure an easy installation process and offers direct integration with many Asterisk capabilities, including presence, voicemail, call parking, and call recording. The DPMA is utilized in stand-alone Asterisk systems, in FreePBX systems, and Switchvox systems.
The D-Series telephones possess an embedded root certificate used to encrypt communications between the D-phone and the DPMA. This certificate was created during the initial development of the D-Series phones in 2011 and had a ten-year lifetime.
As a result, the certificate will expire and become invalid on Friday, May 28, 2021, at 4:45 pm Eastern Daylight Time.
The effect of this certificate expiring is that after May 28, any D-phones already in use will experience application loading errors, which affects voicemail, status, parking, and queues. Any new D-phones that are started anew or rebooted will be unable to connect to and provision. The D-phone will attempt to “contact proxy,” and it will never succeed.
However, we do know how to fix it.
Sangoma has produced new versions of DPMA, Proxy, D-Series telephone firmware, and Switchvox mobile softphone that remediate the problem. Administrators (except Switchvox Cloud and PBXact UCC) MUST take action before the expiration date. For Switchvox users on 7.x, the new firmware is included in Switchvox version 7.6.2. For Switchvox users on 6.x or 5.x, the latest releases are 6.8 and 5.12, respectively.
Steps to take…
Sangoma has developed quick to implement and future-proof solutions. Please visit the resource page for complete information on how to resolve the issue.
Since the certification expires on May 28, 2021, this is a time-sensitive issue that requires immediate action to be taken. Please visit the resource page for complete information on how to resolve this issue.