Expanding CDWM to DWDM
The huge demand for the bandwidth of the links, as well as their reliability and security make it very common in the world of telecommunications to talk about fiber optic cabling and its possibilities.
Anyone who has come to face the process of building a new fiber optic cable knows what difficulties and costs this entails. This is why wave propagation systems, a technology that allows you to combine several independent data streams in a single optical fiber using different wavelengths, are gaining more and more importance.
There are 3 types of WDM architecture:
- the first, which separates the strand of the window of the second from the strand of the window of the third;
- second — CWDM, which provides 18 wavelengths, with an interval of 20 nm, starting at 1270 nm and ending at 1610 nm;
- The third technology — DWDM — provides 48 independent channels for the 100 GHz network and 96 independent transmission channels for the 50 GHz network, with a spacing of 0.8 nm and 0.4 nm respectively.
The first of these technologies is the least interesting from the point of view of multiplying the capabilities of a single fiber, since it allows only to double it.
Main Advantage of CWDM Technology, especially for low bit rates, is the cost of optics, which is as much as 1/5 compared to the cost of equivalent optics for DWDM systems.
Taka the difference in the price of optics means that customers who start their adventure with wave propagation systems turn their eyes precisely towards CWDM solutions. Depending on how long the system is supposed to run, we can use 8 or 18 wavelengths from the available range — this is due to different insertion losses between the second and third transmission windows.
Whether we are considering building the first wave multiplication system or we already have a system built with CWDM technology, we can multiply its capabilities using DWDM technology. By choosing DWDM solutions in a 100 GHz network, we can expand the CWDM system Another 24 channels, while opting for a 50 GHz network — even with another 48 independent transmission channels.
The initial deployment of CWDM technology means that the initial investment costs are lower than with DWDM. This may help some operators take the first step towards having their own infrastructure or using it more efficiently.
At the same time, the greater opportunities it offers dense wave multiplication, will be able to run on the infrastructure built in this way, without having to interrupt its operation. This is real architecture “pay as you grow”.
It is worth remembering that a typical CWDM band allows data transfer in a single channel with a maximum speed of 14 Gbps, while DWDM technology allows for bitrate up to 400 Gbps. This means that when deciding today to build a CWDM system that will allow us to transmit about 100 Gbps, we leave ourselves the possibility that the fibers that we own or lease will support even more than 19 Tbps in the future.
The combination of the advantages of CWDM and DWDM technology allows you to meet the growing demand for bandwidth while optimizing the necessary investment. To the most important advantages Such architectures include, without a doubt, the following:
- low cost initial installation,
- Easy and continuous expansion o seguinte canali
- scalability from 100 Gbps up to 19 Tbps,
- architecture “pay as you grow”.
At Salumanus we support our partners in building good ICT networks. We focus on the selection of solutions to meet the requirements of the rapidly changing world of telecommunications.
We want the products and systems we provide to be a durable and stable part of the network infrastructure, guaranteeing our partners efficient operation and a high rate of return on investment.
We are a helping hand for those companies whose functioning and efficiency depend on efficient networks. We help build good ICT networks.