Challenge and Solution

The bandwidth carried on core and metropolitan (metro) DWDM networks is growing exponentially, but operators' revenues are not growing as quickly. The Cisco ONS 15454 40 Gbps solution can dramatically lower the cost to carry bandwidth, helping maintain and improve customers' profitability. Internet growth is still exponential, mainly because of demand for next-generation services such as quadruple play (data, voice, video, and mobility), video distribution, Internet Protocol Television (IPTV), and other high-bandwidth services.

This growth in data transmission in DWDM networks that require technology advances to support such large bandwidth. Scaling from 10 to 40 Gbps is the perfect solution for this problem; it quadruples the bandwidth that can be transported over existing fiber networks.

New modulation techniques now support ultra-long-haul (ULH) networks with more than 2000 km of unregenerated optical links. The Cisco ONS 15454 MSTP 4-Port 10Gbps Full-Band Tuneable CP-DQPSK Muxponder Card is designed to satisfy the following requirements.

? 40-Gbps signals must work in fully uncompensated networks up to more than 2000 km.

? 40-Gbps signals must work with very low-quality fiber with very high polarization mode dispersion (PMD) coefficients.

? 40-Gbps technology must work on 50-GHz systems with negligible filtering penalty.

? 40-Gbps units must fit mechanically and thermally with existing installed shelves with no effect on existing units, allowing full back-compatibility and no restriction rules for where the units can be placed.