MagTek OPOS FOR MSR - Manual (Page 17)

Section 2. Utility
13
When clicking the LDN button, the Logical Device Name Management dialog is launched for
adding and deleting Logical Device Names registrations for each MagTek MSR Master Key: 1)
MagTek_MSR-1 (representing the non-encrypted based reader) and 2) MagTek_MSR-2
(representing the encrypted based reader).