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.
|Parameters / Chassis||XC9R2||V10R2-X2||V10R2-X4*|
|Chassis switching capacity||900 G||2 T||4 T|
|Number of cards||11+2 (out of cross connect for transponders)||13|
|Line cards||100 G||1x200G, 2х100G, 2x200G|
|Types of client cards||10х10 G (10GE, STM-64, OTU2, 10GFC, 100GE)||2x100G, 20X10G (10GE, STM-64, OTU2), 10GFC, 100GE, 40G, STM-256|
|Redundancy X-connect cards||1+1||2+1|
|Redundant control units||1+1|
|Sync block reservations||1+1|
|Power supply redundancy||1+1|
Equipment for the Volga series chassis with OTN switching
- Transfer up to 2 channels 100 / 200G from one line card
- Replaceable CFP / CFP2 modules on line cards
- A wide variety of client interfaces and the number of ports (up to 20) on client boards
- Plug-in SFP + / SFP28 modules on client boards
The WDM / OTN cross-switch architecture implies the presence in the chassis of separate line cards (DWDM side) and tributary cards (client interface side), interconnected via the OTN cross-connect matrix. For example, in the new XC900 chassis, it will be possible to use 2 slots for conventional transponders.
Line Card Features
|Number of interfaces|
|Automatic dispersion correction|
up to ± 20 ns/nm
до ± 50 ns/nm
до ± 40 ns/nm
|OSNRτ (0,1 nm, BER=10-¹²|
|Output power (BER=10-¹²)|
Client Card Features
|Quantity and interface type|
20 (SFP+ /SFP28)
2 x ( QSFP+/
2 x ( QSFP+/QSFP28) + 1 x SFP+/
10GE, OTU2, STM-64,