100G LR4 QSFP28 single vs dual rate transceivers | OTN

The aim of these four articles about optical transceivers is to familiarise potential users with the technology used in the modules, the potential solutions, functional differences, areas of application and possible integration with other GBC Photonics products.

Are single or dual rate transceivers best for my application?

To best address their target applications, single and dual rate optical transceivers present several differences in their construction, such as the type of laser they use, as well as some of their internal components.

For example, dual rate transceivers deal with two transmission speeds, meaning that signal operations are more demanding and challenge manufacturers to ensure good signal integrity. Moreover, in the case of OTN and Ethernet standards there are other levels of tolerance for signal parameter deviations. For example, a bit-rate tolerance parameter for OTN equals +/- 20 ppm, while for Ethernet it equals +/- 100 ppm. For these reasons, dual rate transceivers are more expensive than single rate transceivers of a similar type.

Transceivers for OTN systems

From the user’s point of view, the purchase of dual rate transceivers is justified where transceivers are designed to work in OTN transmission systems, or when the current infrastructure based on Ethernet standards is being switched to OTN transmission technology. When switches and routers work only in the Ethernet network environment, it is advisable to use more cost-effective single rate transceivers.

  • Tags:
Product added to compare.