In the current EPOS Manager you can manually add the serial numbers of Analog (Easy disconnect) headsets.
Option 1: Manually add serial number of one device at a time.
Open EPOS Manager --> Manage devices --> on Stock --> Create new device as shown in below picture.
Choose Analog headset and choose any Easy disconnect headset from the drop-down menu as shown in the below picture.
Option 2: Import excel file with list of all serial numbers.
Open EPOS Manager --> Manage devices --> on Stock --> Import devices.
Download the sample template.
Here you can upload the csv file as shown in the below picture.