Cisco reaches 26.4 Tbps in the submarine transatlantic cable tide between the United States and Spain

The tests, which have been carried out taking advantage of the flexibility of the NCS 1004 system, demonstrate the greatest capacity and spectral efficiency achieved to date.

Culm has successfully tried the operation of its platform Network Convergence System (NCS) 1004 on The sea, the 6,600 kilometers underwater system that connects the United States with southern Europe, from Virginia Beach (Virginia) until Bilbao (Playa de Sopelana, Spain).

The test consisted of providing greater transatlantic bandwidth, among other capabilities. Taking advantage of the flexibility of the NCS 1004 system, various combinations of channel capacity to maximize the performance and spectral efficiency of the cable were tested, obtaining record results: a 400g yield without errors In the Virginia-Bilbao and Canales test with a spectral efficiency of 6,445 BPS/Hz (bits per second/Hercio); and a spectral efficiency of 4.52 BPS/Hz in the case of the return loop (from Bilbao to Virginia and back to Bilbao) for a distance greater than 13,200 km.

Network operators do not have unlimited bandwidth, so spectral efficiency is the most important measure in underwater implementations. This measure refers to the speed that can be transmitted through a given bandwidth, checking the effectiveness of the physical layer when using a limited frequency spectrum. The spectral efficiency of a communication link can be improved by packaging more information or bits in a single transmission.

The Cisco NCS 1004 platform has thus achieved a Maximum capacity of 26.4 Tbps In the tide cable, reaching until 18.9 Tbps in the case of the transatlantic return loop.

Bill Gartner, Senior vice president and general director of optical and optical systems in Cisco, highlights that "this shows that 24.7 Tbps on tide can be used comfortably, being able to deploy up to 18.5 Tbps for twice a distance in the case of the return loop, also with a wide margin."

The Cisco NCS 1004 platform has been designed to Maximize wavelength and fiber capacity in a compact size and with lower energy consumption. In 2RU, the system admits up to 4.8 TBPS of customers and 4.8 TBPS of trunk traffic. CISCO NCS 1004 offers DWDM transport capacities with agility, programming capacity and ease of use. The Cisco NCS 2000 system working with NCS 1004 offers agility, programming capacity and mass scalability for ultra long distance networks, underwater, metropolitan and business.