It works great, as simple as, install, configure and deploy.
You will need an installed and working WHMCS, version 4.2 or higher.
You will need Bestvoipreselling account, you don't have to buy credit for this to work.
You will need FTP access to your WHMCS installation directory.
Download and extract itsp.zip from your account area.
ITSP directory contains 2 folders and 1 files; (BVR_UsersImporting), (itsp) and (itsp_hook.php)
Copy directory BVR_UsersImporting to whmcs_home_dir/modules/addons
Copy directory itsp to whmcs_home_dir/modules/servers/
Move itsp_hook.php to whmcs_home_dir/includes/hooks/
Now you have the module installed.
You can configure ITSP in three different ways providing three types of packages.
After installation of module, verify module activation.
Login to your WHMCS admin panel
Go to Setup then Products/Services and Products/Services
Create a product group
Create a product
Configure product details
Configure Module settingsFor more details on configurations scenarios for different packages types please visit help section after login to your account