Page "Tandem Computers" Paragraph 29

Up to 14 TXP and NonStop II systems could now be combined via FOX, a long-distance fault-tolerant fibre optic bus for connecting TNS clusters across a business campus ; a cluster of clusters with a total of 224 cpus.

This allowed further scale-up for taking on the largest mainframe applications.

Like the CPU modules within the computers, Guardian could failover entire task sets to other machines in the network.

World-wide clusters of 4000 CPUs could also be built via conventional long-haul network links.