The OptiX BWS 1600G Backbone DWDM Optical Transmission System, the OptiX BWS 1600G for short, is a large capacity and long haul backbone transmission product. It is designed in line with the present conditions and the future development of optical networks, with inherited flexible configuration and good compatibility of OptiX series.

With the modular design that enables rich configurations and flexible protection features, the OptiX BWS 1600G plays a leading role in a transmission network. The access capacity of an optical fiber can be smoothly expanded from 10 Gbit/s to 1920 Gbit/s (192 × 10 Gbit/s). During the expansion, there is no need to shut off the equipment or interrupt the service. You need to only insert new hardware or add new nodes.

The OptiX BWS 1600G system can be deployed in point-to-point, linear and ring networks. As a piece of equipment used at the backbone layer, it connects main cities to carry heavy traffic of optical switching equipment, metropolitan area network (MAN) DWDM equipment, SDH equipment or routers. It provides transmission channels with large capacity for services and network outlets.

To meet the requirements of different areas, users, and investment, the system is available in six types.

The system is classified into different types based on the following considerations:

• Requirements of different users
• Requirements on network capacities in different areas
• Fiber types in different areas
• Initial and overall investment budgets of different users

• C400G/C800G System
• C480G/C960G System
• C1600G/C1920G System
• LHP System
• 2.5G Transmission System
• 40G Transmission System

The product can apply to the following networking topologies: point-to-point network, chain network, ring network.

Through the above topologies, the product achieves the following applications:

• Long haul transmission
• Ultra long haul transmission
• Ultra long haul plus long hop transmission

• Point-to-Point Network
  It is composed of OTM and OLA stations, and it is the most prevalent networking mode adopted by the system.
• Chain Network
  A chain network may comprise OTM, OLA, OADM, REG and OEQ stations and can be regarded as the extension of a point-to-point network.
• Ring Network
  Ring network may comprise OADMs or back-to-back OTMs depending on the practical situation.

The transmission capacity varies with the system type.

The system meets the demands for bandwidth of operators to the best extent by accessing:

• 192 channels with 10 Gbit/s rate of each channel
• 80 channels with 40 Gbit/s rate of each channel

The system adopts of modular design. The access capacity can be expanded easily. The system expansion from 40->80->120->160 wavelengths can be realized. The extended C band can also be used to obtain extra 20% transmission capacity. In this case, a maximum of 192 wavelengths are available. The system upgrade is achieved by increasing the number of wavelengths easily. This design enables carriers to invest and construct the backbone transmission network phase by phase according to the actual needs.

The product supports extra long haul transmission without electrical regeneration.

The system chooses to adopt FEC, SuperWDM, dispersion compensation or optical equalization technology based on the actual fiber line type. It supports the transmission of extra long distance without electrical regenerators. The maximum transmission distance without electrical regenerators reaches 50×22 dB, that is, 4000 km.

There are three communication modes: HWECC, IP over DCC and OSI over DCC.

• HWECC: The management information is transmitted by using the HWECC protocol sharing method.
• IP over DCC: The management information is transferred by using the IP protocol sharing method.
• OSI over DCC: The management transmitted is transferred by using the OSI protocol sharing method.

The system supports different types of functional units.

By functions, the boards can be categorized as follows:

• Optical transponder board
• Optical multiplexer and demultiplexer board
• Optical add and drop multiplexing board
• Optical amplifier board
• Optical supervisory channel and timing transmission board
• Spectrum analyzer board
• Variable optical attenuator board
• Optical power and dispersion slope equalizing board
• Optical fiber automatic monitoring board
• Protection board
• System control and communication board