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What is
DWDM?

Telecommunication networks today employ optical technology to transport the enormous amounts of data we consume, often across large distances. It is for this reason that networks are built using fiber optic cable. In order to maximise the transmission capacity of these cable assets, a technology known as wavelength division multiplexing (WDM) was developed. The most recent incarnation of this, and the most popular variant today, is known as dense wavelength division multiplexing (DWDM). Essentially, DWDM squeezes data traffic into many distinct optical channels, using different wavelength bands, or ‘colours’ of light. With the latest flexgrid and C+L technology, DWDM systems can carry 30-40 Tb/s across a single fiber pair, depending upon the length of the fiber stretch itself.

Since its introduction in late 90’s, DWDM has played an important role in optical networking, and increased the data capacity and utilization of the physical fiber dramatically. Simply explained, DWDM technology is based on the combination and transmission of multiple optical signals, with dedicated wavelengths simultaneously using the same fiber cable. This means that DWDM uses single mode fiber to carry multiple light waves of different frequencies. Because of its simplicity and efficiency, DWDM technology is a key component of the Internet backbone, providing almost unlimited transmission capacity and scalability. 

DWDM is used in both terrestrial and subsea networks, and other scenarios, including data center to data center links. Apart from meeting high capacity requirements, DWDM also delivers required levels of quality and security. This technology is especially suitable and cost-effective for long distance transmission, i.e. long-haul networking.

Telia Carrier’s Wavelength offerings, based on DWDM technology and underpinned with software-defined flexibility, are scalable and easily upgradeable. We can transport of heavy data loads that require high capacity and flexibility. Our Wavelength services support all applications, from voice and video to data storage across different customer sites - on a global scale. Customers can also choose between different options to build their network and connect key locations, from single links to a redundant ring topologies.

Additionally, we offer a dual-link service option, with our highest level of availability for the most critical applications. This provides two fully diverse routes between the same endpoints.

Why Telia Carrier Wavelength services?

  • Telia Carrier was the first provider of 100G in NA and EU and we will soon launch 400G
  • Telia Carrier’s solutions are scalable, flexible and future-proof – we provide the building blocks for companies who need to increase their data traffic capacity and improve global network connectivity 
  • In 2019, our net promoter score (NPS) reached 53 (way above our industry benchmark), and Telia Carrier has been consistently awarded for exceptional customer care 
    Our high first line resolution rate (77%) is made possible by our team of highly qualified engineers
  • Telia Carrier has extensive experience from selling Wavelengths and is a leading global player in the market
  • Telia Carrier has grown organically, without any acquisitions and provides a homogeneous and consistent network experience to our customers.

Technical highlights

Wavelengths service options: single, protected and dual links
Ethernet

1 GE

10 GE

100 GE

SDH

STM 16/ OC 48

STM 64/ OC 192

ODU capacity

OTU 2

OTU 2e

OTU 4

 

Security highlights

When you need the highest level of security for critical data, our highest level of availability, the dual-link service option provides two fully diverse routes between the same end points.

Secure by design features
Dual NOCs situated in secure underground locations
Physical and logical security from design to deployment
Network-wide Acceptable Use Policy (AUP)
Customer Service authentication procedures
Clear customer data handling policies

THE SOFTWAREIZATION OF OPTICAL NETWORKS

Jointly written by Telia Carrier and Infinera, in this white paper you will learn how softwareization of optical networks can:

  • Increase the utilization of bandwidth
  • Facilitate self-service and bandwidth-on-demand applications
  • Empower businesses to intelligently apply resources where they are most impactful
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