Hi jmalhan and welcome to LQ.
This question seems related to your other one about the Yealink phone and Centos:
https://www.linuxquestions.org/quest...-a-4175615117/
Please note that for both questions, you've been very brief and not clear about what steps you have followed, whether you are following a guide, what the documentation for that phone states regarding Linux support, or if you've searched the web and found any information about this. What led you to install Asterisk to help to solve this problem?