Unisys manual Guidelines for Configuring Channels, CS buses per domain for NX5820 K

Configuring Channels

	Table 5–4. Guidelines for Configuring Channels
Rule	Description
Number of	Standard: 4 CMFs per CIOM (CMF 0, 1, 2, 3 per CIOM)
CMFs per CIOM	Maximum: Up to a maximum of 16 external CMFs per domain (32 CMFs per system) for
	NX5820.
	Up to a maximum of 20 external CMFs per domain (40 CMFs per system)for
	NX5820 K.
CS-bus	A minimum of four CS-bus interfaces per CIOM are provided. When using up to 4 CIOMs
interfaces	with CS-bus connectivity, there are a maximum of 16 CS buses per domain for
	NX5820. When using up to 5 CIOMs with CS-bus connectivity, there are a maximum
	of 20 CS buses per domain for NX5820 K.
	For all models, one additional CS-bus interface is required for each server attached to
	the system. As an option, servers can be connected via the PCI thru card. Refer to
	optional configurations in this section.
	For the first CIOM in each domain, two of the four standard CMF/CS-bus interfaces
	(CMF0/4 and CMF1/5) can service channels in the internal channel rack located
	within the module assembly, plus additional external channels (up to 8 channels
	maximum per CS-bus).
	CS-bus interfaces can be connected to an external channel rack via optional package
	styles listed in Table 5–1.
	Each CS-Bus interface can service up to sixteen channel loads; however, see “Assigning
	Channel Loads” earlier in this section. Channel loads should be balanced across
	CMFs, CS-busses, and domains.

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