It offers simultaneous bi-directional 10Gbps transfer speeds over a single cable, with the flexibility to daisy-chain up to six Thunderbolt-ready devices with a single connection as well as offering full display port support for a 7th Thunderbolt or display port equipped monitor.
The PDE immediately switched over to a back-up chain, and it also shut itself down just in case the anomaly was a problem in the electronics rather than in the physical system itself.