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Submarine Terrestrial Integration

World leader in submarine networks

Nokia is the industry leader in the design, manufacture, deployment, and maintenance of submarine networks, with more than 150 years of submarine cable experience and more than 200 submarine systems deployed to date.

Nokia develops its technology and systems in-house, including repeaters, branching units, power feed equipment, SLTE, and terrestrial WDM systems. Our extensive research, product development, and testing facilities ensure industry leading solutions for both terrestrial and submarine WDM applications.

Upgrading submarine capacity

Nokia offers several solutions for upgrading existing submarine systems with newer, higher capacity systems, including the Nokia 1830 Photonic Service Switch (PSS) WDM system and the Nokia 1620 Softnode platform. With these solutions, you can:

  • Upgrade or expand existing SLTE sites with additional capacity
  • Support 100G wavelengths over submarine wet plant
  • Optimize network capacity with multi-modulation transponders supporting 100G to 500G per unit
  • Integrate SLTE with existing terrestrial- based WDM networks
  • Reduce cost by eliminating back–to-back transponders at interconnection points
  • Reduce size and reduce power consumption per bit.
Fig.1 1830 PSS
Fig.2 1620 Softnode

Submarine - Terrestrial integration

Directly integrating terrestrial WDM nodes with the submarine wet link eliminates back-to-back transponders and terminals used to interconnect the cable landing station to the closest metro Point of Presence (POP).

As submarine cables are brought onshore, they terminate at telecommunications buildings known as cable landing stations, which house the SLTE nodes, as well as additional equipment to provide electrical power and network management.

Most cable landing points are in remote locations, so terrestrial WDM networks are deployed to connect the landing station to the nearest metro Point of Presence (POP) office, often 40 to – 200 kKm away. Unfortunately, each of these network segments use utilize separate WDM systems with back- to- back transponders (O-E-O) at the interconnection points.



Integrating terrestrial WDM nodes with the submarine wet link eliminates back-back transponders and terminals to connect the cable landing station to the closest metro POP.