Cross-Connect DWDM Platform Volga

The first Russian OTN cross-connector Volga performs digital switching ODU streams in ODU0/1/2/3/4 levels in non-blocking mode. XC2T model have total capacity up to 2 Tbit/s. A cross-switch with a 4 Tbit/s matrix capacity is being developed.

OTN switching (OTN X-Connect) allows you to freely redistribute OTN traffic between different ports of the same device at the level of individual ODU-k containers on different linear ports with different wavelengths. Thus, the OTN switch allows the operator to manage the distribution of client port traffic on transport channels more efficiently. Moreover, each client port is no longer strictly connected to a specific transport channel (as in the muxponder): traffic can be switched to any transport interface through the control system, or you can configure automatic traffic redistribution depending on the load of channels.

OTN technology is the successor to SDH channel switching technology, a key element of which is cross-connection of VC-x channels. OTN cross-connect ODU-k channels took the best and useful SDH functions, such as:

1. The Add-Drop & Continue function allows you to copy the same service channel, for example, in two independent directions (linear outputs) and at different wavelengths.
2. The function of the protective switching SNCP ODU-k of the working channel to the standby ≤ 50 ms.

OTN technology is used in conjunction with DWDM spectral multiplexing technology, where several OTN ODU-k channels of different levels at different wavelengths can be transmitted simultaneously on a single fiber. A combination of OTN and DWDM technologies is today the most common solution for building modern fiber-optic telecommunication networks.