1. Enable it on the extension in the matrix. (Please ask Euphoria Support to do this)
  2. Log into the Yealink account by inserting the IP address in a web browser.
    Note: To log into the device, the user will need the IP address (refer to the devices configuration manual)
  3. Click on Account settings and change the Transport to TLS, and the Server port to 5061
  4. Double-check in Settings under SIP (if the phone supports it) that the TLS SIP Port is 5061
  5. In Account settings under the Advanced tab, Set RTP Encryption (SRTP) to Compulsory.
  6. Click on Security settings and Disable "Only Accept Trusted Certificates" 
    Note: There will be a padlock on the phone's display when making a call out.