Modern Windows blocks unsigned kernel drivers. The Multikey driver is not Microsoft-signed.

One of the primary functions of the 1822 Link is compression. When the latch is engaged, it exerts massive clamping force. This compresses internal gaskets (often poron or silicone foam) to create an airtight seal.

You likely won’t find “Multikey 1822 Link” in a Cisco manual or RFC database. However, the concept appears in: