Step 1: Enable it on the extension in the matrix. (Please ask Euphoria Support to do this)

Step 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)

Step 3: Click on Account settings and change the Transport to TLS, and the Server port to 5061

Step 4: Double-check in Settings under SIP (if the phone supports it) that the TLS SIP Port is 5061

Step 5: In Account settings under the Advanced tab, Set RTP Encryption (SRTP) to Compulsory.

Step 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.