Packages for Grandstream Brand

I’m trying to add new phones to PBX, but I need a package file to upload so it recognizes the model number. Does anyone know where to get this??

if yes go to oss endpoint configuration and select the brands and models you want to use (assuming the phones are supported in OSS EPM). don’t forget to install the firmware. however I don’t think there is any development ongoing on the OSS EPM so you might need to invest in the paid version.