Adder Technology 2XPRO - Manual (Page 19)

SmartView XPro Installation and Use Page 18
SmartView XPros may also be cascaded to single user SmartView Pro products with
the restriction that the SmartView Pro units must be on the last layer of the tree and
that no further units are cascaded off these.
When cascading SmartView XPros keep in mind the following rules
The maximum number of layers in a SmartView XPros cascade is four.
You may cascade 4XPro units with 1, 2, 3 or 4 KVM links and 2XPro units with 1
or 2 KVM links. The number of KVM links that you install defines the number of
simultaneous uses that are supported.
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 between SmartView XPros then ensure
that the cables are approximately the same length.
SmartView Pro devices may be cascaded to XPro cascades but the Pro units
must always be on the lowest level of the cascade (in other words you must not
cascade an XPro device off a Pro device)
SmartView XPro 4, XPro 8, XPro 12 and XPro 16 models may be cascaded
together.
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 4.16 for more details)