Make sure you attach the built-in direct_dial application.
Plivo will append random numbers to your endpoint username. Make a note of your endpoint username.
Host your XML
You need to host a static URL which returns a Dial XML when Plivo requests the URL.
Create a file with the following contents. Append phone.plivo.com to your endpoint username and change the SIP URI “sip:firstname.lastname@example.org” in the below example to your endpoint’s SIP URI. Make sure your URI starts with “sip:”