Step 1 - Add Postman as an Add-on for your Google Chrome browser. This video tutorial should be useful.
If the plugin is not working, you can use this function directly by downloading the free Postman App.
Step 2 - Sign up and begin importing after launching the app (by clicking on https://www.getpostman.com/collections/da36b086217bca1fb732, the collection's settings will be automatically imported to your Postman app/account).
Step 3 - Replace all the following variables:
|<your_api_key>, <your_api_token>, <your_sid>||How to find my Exotel Key, Exotel Token and Exotel SID?|
|<agent_number>||Enter the 'From' or the caller's number, who would answer the call first|
|<customer_number>||Enter the 'To' or the callee's number, to whom the caller/agent is trying to connect|
|<ExoPhone>||Enter the virtual number / DID through which you wish to route the call|