Cisco NCS 2000 100-Gbps DWDM Line Card with Soft Decision FEC Data Sheet

Your dynamic optical networks require consistent performance across extended distances, widely varying fiber plants, and challenging transmission environments. Get the exceptional transmission performance you need with the Cisco^® NCS 2000 100-Gbps DWDM Line Card with Soft Decision Forward Error Correction (FEC). Based on state-of-the-art Cisco nLight^™ silicon, the Cisco NCS 2000 100-Gbps DWDM Line Card with Soft Decision FEC delivers exceptional transmission performance.

Product Features and Benefits

The Cisco NCS 2000 100-Gbps DWDM Line Card with Soft Decision FEC (Figure 1) is a module for the Cisco Network Convergence System 2000 Series (NCS 2000 Series) which transports 100 Gigabit Ethernet interfaces and services across metro, regional, and long haul dense wavelength division multiplexing (DWDM) optical networks.

The card features a pluggable client interface, allowing it to map the client or a signal from an optional tributary line card to a single DWDM line interface, providing transponder or muxponder capabilities. The client port supports the Cisco CPAK^™ pluggable transceiver.

The card features a software-configurable baud rate between 27.952 and 31.241 Gbaud depending on FEC selection and a G.709v3 OTU-4 wrapped optical interface. Operated within the outlined specifications, the trunk card can operate with a post-FEC bit error rate (BER) of better than 1 x 10^-15.

The Cisco NCS 2000 100-Gbps DWDM Line Card with Soft Decision FEC is designed to provide the following benefits:

●   Transport of 100-Gbps wavelengths over fully uncompensated networks with very high polarization mode dispersion (PMD), with unregenerated optical reach of up to 6800 km.

●   Support for one hundred twenty eight (128) channels at 37.5GHz channel spacing, or up to 150 channels at minimal spacing.

●   Continuously tunable laser and Nyquist transmit filtering for creation of multi-carrier DWDM superchannels.

●   Exceptional system density of 42 100-Gbps transponders per rack with a 100GBASE-LR4 client interface.

●   Support for different configurations - transponder, muxponder, or regenerator.

Modulation Scheme

The Cisco NCS 2000 100-Gbps DWDM Line Card with Soft Decision FEC features a coherent polarized differential quadrature phase shift keying (CP-DQPSK) modulation format with active cycle slip management to optimize 100-Gbps transmission in terms of optical signal-to-noise ratio (OSNR), CD, and PMD robustness.

Forward Error Correction

The Cisco NCS 2000 100-Gbps DWDM Line Card with Soft Decision FEC supports multiple FEC mechanisms on its trunk and client interfaces. The trunk port supports two FEC modes:

●   Soft Decision FEC with 20 percent overhead

●   Hard Decision FEC with 7 percent overhead - Standards based ITU-T G.975

The Soft Decision FEC employs an advanced differential encoding and cycle slip-aware algorithm offering excellent performance and robustness against high cycle slip rates. Hard decision FEC is fully interoperable with previous generations of Cisco NCS 2000 Series and Cisco ONS 15454 MSTP 100-Gbps DWDM trunk cards. The client port supports the ITU-T G.975 FEC algorithm when configured as an OTU-4, which can be activated or disabled through software configuration.

Protocol Transparency

The Cisco NCS 2000 100-Gbps DWDM Line Card with Soft Decision FEC can transparently deliver 100-Gbps point-to-point services. Table 1 shows transponder client configurations and mapping.

Table 1.       Transponder Client Configurations and Mapping

Wavelength Tunability

The card supports software-provisionable, continuous tunability across the full C band. The trunk frequency can be tuned in increments of 0.1 GHz.

Protection Mechanisms

The line card supports multiple protection mechanisms commonly used in optical transport networks. Table 2 outlines the available protection options and the associated service-level agreements (SLAs) that can be provided.

Table 2.       Protection Formats

Flow-Through Timing

The Cisco NCS 2000 100-Gbps DWDM Line Card with Soft Decision FEC allows timing to flow through from client to line optical interface. The received timing from the client interface is used to time the line transmitter interface. This flow-through timing allows multiple trunk cards in the same shelf to be independently timed, independent of the network element timing.

Management

The Cisco NCS 2000 Series provides comprehensive management capabilities to support OAM&P capabilities through the integrated Cisco Transport Controller craft interface with support from the Cisco Prime^™ Optical element management system. The trunk card features provisionable digital wrapper (G.709) functions, providing per-wavelength performance-management capabilities, especially for services transported transparently across the network. The generic communication channel (GCC) of the digital wrapper provides a separate communications channel on a per-wavelength basis to be used by the platform when transparent signals are transported. GCC allows the Cisco NCS 2000 Series to extend its advanced network autodiscovery capabilities to DWDM-based services.

Far-End-Laser-Off Behavior

The Cisco NCS 2000 100-Gbps DWDM Line Card with Soft Decision FEC can provision the far-end-laser-off behavior when SONET/SDH payloads are present. The remote client can be configured to squelch or to send an Alarm Indication Signal (AIS) following a fault condition. For 100 Gigabit Ethernet signals, the default behavior is squelching.

Performance Monitoring

The Cisco NCS 2000 100-Gbps DWDM Line Card with Soft Decision FEC supports both transparent and non-transparent signal transport performance monitoring. The digital wrapper channel is monitored according to G.709 Optical Transport Network (OTN) and G.8021 standards. Performance monitoring of optical parameters on the client and DWDM line interface includes Loss of Signal (LOS), laser bias current, and transmit and receive optical power. Calculation and accumulation of the performance-monitoring data are supported in 15-minute and 24-hour intervals as per G.7710.

Physical system parameters measured at the wavelength level, such as mean polarization mode dispersion, accumulated chromatic dispersion, and received optical signal-to-noise ratio (SNR) are also included in the set of performance-monitoring parameters. These parameters can greatly simplify troubleshooting operations and enhance the set of data that can be collected directly from the equipment.

The trunk card incorporates faceplate-mounted LEDs to provide a quick visual check of the operational status of the card.

Regeneration

The Cisco NCS 2000 100-Gbps DWDM Line Card with Soft Decision FEC supports OTU-4 regeneration capabilities. Regeneration terminates OTU-4 overhead while allowing the ODU-4 payload to transparently pass through. GCC0 is terminated, while GCC1 and GCC2 are passed through. No Cisco CPAK client is required, as communication between the two cards in a regeneration group occurs through the chassis backplane.

Muxponding Configurations

The Cisco NCS 2000 100-Gbps DWDM Line Card with Soft Decision FEC can be paired with various line cards to provide muxponding capability. Muxponding client cards, listed in Table 3, are placed in an adjacent slot, communicating with the trunk card through the chassis backplane.

Table 3.       Muxponding Client Cards

Transponder Application

The Cisco NCS 2000 100-Gbps DWDM Line Card with Soft Decision FEC provides a very efficient single-slot solution using the Cisco CPAK pluggable transceiver as the client interface. The Cisco CPAK is available in two variants providing IEEE-compliant 100GBASE-SR10 and 100GBASE-LR4 optical interfaces. Interworking with CXP and CFP 100 Gigabit Ethernet transceivers is supported. Please refer to the Cisco CPAK 100GBASE Modules Data Sheet for additional information. 100 Gigabit Ethernet LAN-PHY is supported as a client signal.

Regulatory Compliance

Table 4 lists regulatory compliance information for the trunk card. Note that all compliance documentation may not be completed at the time of product release. Please check with your Cisco sales representative for countries other than Canada, the United States, and the European Union.

Table 4.       Regulatory Compliance

Other Specifications

Table 5 lists system requirements for the Cisco NCS 2000 100-Gbps DWDM Line Card with Soft Decision FEC. Table 6 provides the DWDM specifications. Table 7 details receive-side optical performances. Table 8 lists performance monitoring parameters. Table 9 provides card specifications, and Table 10 gives ordering information.

Table 5.       System Requirements

Table 6.       DWDM Specifications

Table 7.       DWDM Receive-Side Optical Performances

Table 8.       Performance Monitoring Parameters

Table 9.       Card Specifications

Table 10.     Ordering Information

Warranty

The following warranty terms apply to the Cisco Network Convergence System 2006 as well as services you may use during the warranty period. Your formal warranty statement appears in the Cisco Information Packet that accompanies your Cisco product.

●   Hardware warranty duration: Five years

●   Software warranty duration: One year

●   Hardware replacement, repair, or refund procedure: Cisco or our service center will use commercially reasonable efforts to ship a replacement part for delivery within 15 working days after receipt of the defective product at Cisco's site. Actual delivery times of replacement products may vary depending on customer location

Product warranty terms and other information applicable to Cisco products are available at: http://www.cisco.com/go/warranty.

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