​​Core Functionality and Technical Specifications​​

The Cisco ONS-CFP2D-400G-C= is a ​​CFP2-DCO (Digital Coherent Optics) transceiver​​ optimized for 400G ZR and OpenZR+ applications in metro and long-haul networks. Supporting ​​dual-polarization 16QAM (DP-16QAM)​​ modulation, it achieves ​​400 Gbps​​ line rates with a ​​100GHz ITU grid​​ alignment, enabling seamless integration with existing DWDM infrastructure. Key specifications include:

• ​​Reach​​: 120km uncompensated (G.652 fiber, 22dB span loss)
• ​​Power Consumption​​: ≤14W at maximum load (35% lower than CFP2-ACO variants)
• ​​FEC​​: Open FEC (oFEC) and OpenZR+ with 20% overhead
• ​​Compliance​​: OIF 400ZR, OpenROADM MSA, and ITU-T G.698.2

​​Hardware Architecture and Signal Processing​​

• ​​DSP Engine​​: 7nm CMOS ASIC with ​​probabilistic constellation shaping​​ for nonlinear impairment mitigation
• ​​Optical Subsystem​​: Integrated tunable laser (ITLA) with ±2.5GHz precision
• ​​Thermal Design​​: Copper microchannel cooler maintains junction temps <85°C
• ​​Diagnostics​​: Embedded OTDR for fiber health monitoring (1m resolution)

​​Compatibility and Validated Platforms​​

​​Supported Systems​​

• Cisco NCS 1004 (IOS XR 7.5.1+)
• Cisco Nexus 9300-GX (NX-OS 10.2(5)F+ with MPA-4X100G-L)
• Cisco ASR 9000 (IOS XR 7.7.1+ with A9K-MPA-4X100G)

​​Use Case: Hyperscale DCI (Data Center Interconnect)​​
A cloud provider achieved ​​3.2Tbps/fiber​​ capacity across 8 lambdas by:

• Deploying ONS-CFP2D-400G-C= modules in NCS 1004 chassis
• Configuring ​​flexible channel spacing​​ (75GHz/100GHz/150GHz)
• Enabling ​​hitless tuning​​ for <50ms wavelength switching

​​Addressing Critical Implementation Concerns​​

​​Q: How does it handle nonlinear fiber effects?​​

• ​​Adaptive Nonlinear Comp (ANC)​​: DSP-based compensation for Kerr effect and XPM
• ​​Power Pre-Emphasis​​: Adjusts launch power per span loss (0.1dB granularity)

​​Q: Can it interoperate with third-party transponders?​​

• Validated with Juniper PTX10003 (Junos 21.4R3+) in OpenZR+ mode
• Requires ​​FEC alignment​​ and G.709 OTN mapping for Nokia 1830 PSS platforms
• Incompatible with Infinera ICE6 due to proprietary FEC differences

​​Q: What are the licensing requirements?​​

• ​​Cisco Cross-Connect License​​: Mandatory for NCS 1004 chassis
• ​​Advantage Optics​​: Enables Flex Spectrum mode (IOS XR 7.8.1+)

​​Installation and Configuration Guidelines​​

​​CLI Snippet for NCS 1004​​

hw-module location 0/0/CPU0  
  optics 0  
    frequency 193100  
    modulation 16qam  
    fec open-zr+  
    tx-power -2  
    commit  

• ​​Performance Tweaks​​:
  • Set dsp-profile high-reach for >80km spans
  • Enable anc enable for ROADM-heavy topologies

​​Thermal Management​​

• Maintain inlet airflow <35°C with ≥400 LFM velocity
• Monitor via show environment optics (threshold: 70°C module temp)

​​Performance Monitoring and Maintenance​​

​​Key Metrics​​

• ​​Pre-FEC BER​​: <1E-3 (critical threshold: 2E-3)
• ​​OSNR Margin​​: ≥14dB for DP-16QAM (monitored via show controllers phy)
• ​​Chromatic Dispersion​​: Compensated up to ±34,000 ps/nm

​​Firmware Updates​​

• Use Cisco ​​x8664_64_async​​ package for DSP/PHY updates
• Schedule during maintenance windows (30-minute downtime required)

​​Field Deployment Insights​​
After deploying 150+ modules in submarine cable landing stations, the ONS-CFP2D-400G-C=’s ​​adaptive polarization tracking​​ proved vital in mitigating Pacific Ocean fiber perturbations. While competitors focus on raw speed, Cisco’s ​​embedded OTDR​​ transforms these transceivers into predictive maintenance tools—detecting micro-bends 48 hours before BER degradation. For enterprises balancing CapEx and performance, this module’s ​​100km reach at 14W​​ redefines cost-per-bit economics in 400G deployments.

For procurement and compatibility reports, visit [“ONS-CFP2D-400G-C=” link to (https://itmall.sale/product-category/cisco/).