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Anatomy Of A Deep Sea Fibre Optic Cable

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On the left is a deep sea fibre optic cable. It consists of fibre pairs, ranging from two to 24, placed in a hermetically sealed stainless steel chamber surrounded by closely packed steel wires, then a copper power conductor layer, and finally a polyethylene sheath. The diameter is usually just 17 millimeters or 1.7 centimeters. A standard home garden hose in the US is about 16 mm. Deep sea cables must be thin because the cable's length can be as much as 12,000 kilometers. It would be very difficult to transport and lay a thick cable over long distances. Deep sea cables have always been thin. The engineering challenge is to make it thin and highly reliable.  Note that in shallow waters, usually defined as either 2,000 or 1,000 meters deep and less, the cables may have external armor in the form of steel wires wrapped around the polyethylene sheath. This protects against fishing and anchors. The cable sample on the right is armored. An armored cable typically has one to three sets o...
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London/Singapore Redundancy: When the Red Sea Gives You Heart Burn

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Routing: Singapore/Tokyo/LA/Secaucus Equinix/Slough Equinix.
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Invest In Your Human Capital: Classic Textbook on Subsea Cable Technology

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 I recommend this book on subsea cable technology. I am ordering it today for myself. https://shop.elsevier.com/books/undersea-fiber-communication-systems/chesnoy/978-0-443-29886-8
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Subsea Capacity Report: Kenya

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As most of you know, Kenya is one of East Africa's two subsea hubs (Djibouti is the other). The Communication Authority of Kenya requires cable operators to report total lit capacity on a quarterly basis. The chart below shows the market is tight. Only Seacom was able via a large upgrade to increase lit capacity. It appears to me the local cables are maxed out. Seacom itself is getting old. It went live in July 2009. Hence it is approaching 20 years. So it is likely unless Ciena whips up more modulation magic that Seacom is at its lifetime max capacity. Note that 2Africa data has not been integrated into the official statistics, but it is important to note that international traffic is largely between Kenya and Europe, not Kenya and South Africa. Since 2Africa remains incomplete in the Red Sea, it may not affect total lit bandwidth that much. We know the local market is tight not just from the lack of growth in lit capacity, but also the high prices that 100G waves com...
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Another Tool In Your Network Belt: SEA-H2X

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I don't see any compelling reason for totally excluding Chinese Layer 1 capacity from your network. Data should be Layer 3 encrypted in any case and most DWDM box manufacturers such as Ciena offer Layer 1 encryption. The SEA-H2X fibre optic subsea cable went live in May. It offers 200 Tbps throughput on several key routes such as Thailand/Singapore, HK/Singapore, and Malaysia/Singapore. Moreover, it is an open cable system. This means each fibre pair owner selects their submarine line termination equipment. So you might even find a non-Chinese carrier on the system who purchased spectrum or fibre pairs. SEA-H2X is a 8 fibre pair cable whose main trunk connects Singapore to two Chinese landings. Hauwei was the system integrator with China Mobile, China Unicom, and Converge as consortium members. Converge is a large Philippine fibre-to-the-home provider with 2 million subscribers.
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Subsea Cable Class of 2029: AUG East

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Asia United Group East (AUG East) cable's main trunk links Tokyo and Singapore with branches to South Korea, Taiwan, Philippines, Brunei, Malaysia, and possibly Indonesia (the consortium has stated the cable will land in Indonesia, but the map below shows Indonesia is off-net). Few project details are available. Fibre pair count is unknown, but it will be at least 16 and likely as much as 24 fibre pairs given the region's incredible Layer 3 traffic growth. Consortium members include Microsoft, Amazon, Singtel, the Japanese long haul carrier ARTERIA, Chunghwa Telecom (Taiwan PTT), DREAMLINE (Korean competitive carrier), GLOBE Telecom, and Unified National Networks (Brunei). Like Candle, it avoids the South China Sea by hugging its perimeter in order to avoid Chinese permitting (China claims the South China Sea as territorial waters and requires Chinese government permits for all subsea cables laid in it) and put distance between itself and the large number of cables packed toget...
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The Subsea Cable Class of 2028: Candle

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Candle is one of the more interesting Intra-Asian cables to go live over the next several years. It is the first 24 fibre pair system to serve this region. Total transmission capacity is 570 Tbps. This makes it one of the highest capacity cables on the planet. Like Apricot, Candle avoids the South China Sea due to Beijing's territorial claims and permitting demands. The main trunk links the inseparable couple of Tokyo and Singapore with branches into the Philippines, Taiwan, Indonesia, and Malaysia. Consortium leaders include META, Softbank, and Telekom Malaysia. This project, like Apricot, exemplifies the geopolitics of American-Chinese rivalry. Hyperscalers avoid China and HK and exchange traffic at neutral Singapore. However, the routing is shorter than Apricot because Candle is deployed at the edge of the South China Sea as opposed to a long detour around Indonesia and up the East Coast of the Philippines. Like Apricot, Candle offers physical diversity to the usual suspects mak...
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