I used a Delcom dual switch several years back with XP. Worked fine. Tried it with Win7 Pro 64 bit and it didn't work. Company confirmed that it wouldn't. 64 bit was the killer.

Ordered current model (Gen 2). It didn't have the capabilities to record a long string of text that the earlier one did. Only a few characters and in a rather awkward manner . I was disappointed, but found a workaround using some additional software.

I suggest you contact Delcom to see if it will work with your system.