Lindy 32353 User Manual page 19

The Dual MP unit should be used as the master (i.e. at the top of the tree). All
other levels should be Dual products.
Keep all cascade cables as short as possible. The video quality is maximised by
using the shortest possible total cable run from computer to KVM.
If you are making multiple cascade links then ensure that the cables are
approximately the same length.
You must choose groups of cascade ports from the following table. When you
cascade using a group of ports the system will allocate the first available free port in
that group (see section 4.10 and 4.15 for more details)
LINDY CPU Switch Dual Multi-Platform Installation and Use Page 18