How to add your telnyx API & Number?
Download the zip file in the project directory you will see multiple_number.php you can add your telnyx api and telnyx number to power on the tool you can watch video for more details.
How to controll the sending speed?
go to this location C:\xampp\htdocs\telnyx\assets\mail.js in this file when you scroll down you will see there is settimeout function to controll the sedning limit 1000ms means 1 secound you can control you sending milit.
if you have any questions and doubts you can write the comment below the post.