Outline of the Atlantic Fibre Optic Cable Seascape: EXA
EXA has emerged as the dominant player on the Atlantic routes. Its original subsea network consisted of the the highly diverse North and South Hibernia cables complemented by the much faster and younger Express cable. North EXA cable was RFS 2001. It connects London & New York via landings highly diverse to its competitors. North lands in Canada at Halifax and at Southport, UK. In contrast, most Atlantic cables land near New York City and in Cornwall near Bude. North's diversity makes it an excellent choice for network planners focusing on resiliency. Obviously, the cable's latency is high, but that is generally the tradeoff one must accept to achieve physical diversity. I think the RTD 60 Hudson/Telehouse London is probably 76 ms. dfs South EXA cable was also RFS 2001. It lands at the same CLS as North on both sides of the Atlantic. I believe the latency is slightly higher. Express was built much later (RFS 2015). It is designed to be the lowest latency path from LD4 Slo