PWR-COVER-4450=: Technical Design, Safety Com
Introduction to the Cisco PWR-COVER-4450= Power Supply ...
Functional Overview and Design Philosophy
The Cisco ONS-CFP2WDM-BUN4 is a quad-wavelength coherent CFP2 module engineered for metro and long-haul DWDM networks, supporting 400 Gbps aggregate throughput (4x100G wavelengths) with software-tunable modulation from DP-QPSK to DP-64QAM. Designed for Cisco’s NCS 2000 and 8000 series platforms, it integrates nonlinear impairment compensation and adaptive baud rate scaling (45–64 GBaud), achieving OSNR margins below 14 dB for 6000km terrestrial links. This module addresses the growing demand for elastic optical networks capable of dynamic bandwidth allocation and sub-wavelength grooming.
Hardware Specifications and Performance Benchmarks
- Form Factor: CFP2 (hot-pluggable, MSA-compliant)
- Wavelength Range: C-band tunable (191.3–196.1 THz) with 75 GHz granularity
- Modulation Schemes: DP-BPSK, DP-QPSK, DP-16QAM, DP-64QAM (per wavelength)
- FEC Options: SD-FEC (14.3% OH) and oFEC (25% OH) with 12.5 dB net coding gain
- Power Consumption: 24W typical @ 64QAM, 28W max
- Certifications: NEBS Level 3, ITU-T G.698.4, OpenROADM MSA 3.0
Cisco’s Optical Performance Test Suite 8.5 validates <1e-15 BER at −18 dBm receiver sensitivity in mixed-fiber spans containing SMF-28 and LEAF.
Core Deployment Scenarios
1. 5G xHaul Segment Routing
Operators deploy the module for 25G eCPRI aggregation over 200km spans, meeting 3GPP TR 38.804 latency targets (<100μs) through hitless modulation switching during fiber nonlinear events.
2. Hyperscale DCI Optimization
Cloud providers utilize 400G-ZR+ mode with 75 GHz channel spacing, achieving 19.2 Tbps/fiber capacity in Cisco’s NCS 2004 validated design.
3. Submarine Network Modernization
The module’s Raman hybrid amplification compatibility extends unrepeatered spans to 450km, reducing cable power feed equipment costs by 37% in Cisco’s Mediterranean submarine trial.
Feature Comparison: ONS-CFP2WDM-BUN4 vs ONS-CFP2WDM-BUN2
| Parameter | ONS-CFP2WDM-BUN4 | ONS-CFP2WDM-BUN2 |
|---|---|---|
| Wavelength Count | 4 | 2 |
| Max Baud Rate | 64 GBaud | 60 GBaud |
| Power Efficiency | 0.06 W/Gbps | 0.08 W/Gbps |
| Nonlinear Tolerance | 14 dB OSNR @ 64QAM | 16 dB OSNR @ 32QAM |
This table underscores why carriers prefer the BUN4 for high-spectral-efficiency networks, despite requiring 18% higher OSNR margins.
Addressing Critical Implementation Challenges
Q: How does it handle legacy fiber PMD limitations?
The module’s real-time polarization tracking compensates PMD up to 30 ps/√km, enabling 100G transmission on 1980s-vintage Corning SMF-28 with 0.5 ps/√km PMD.
Q: What’s the interoperability with third-party ROADMs?
Limited to Ciena 6500 via OpenROADM 3.0 APIs, but optimal performance requires Cisco WSS-9D with flex-grid channel shaping.
Q: How to manage firmware updates without service interruption?
Use Cisco Crosswork Automation’s hitless upgrade feature during 23:00–01:00 maintenance windows, ensuring <50ms wavelength switching.
Licensing and Total Cost of Ownership
The ONS-CFP2WDM-BUN4 requires:
- Cisco Advanced Optics License (enables programmable FEC and modulation)
- NCS 2000/8000 Base License
Over 7 years, TCO averages $0.09 per gigabit-km including sparing and Smart Net Total Care. For warranty compliance, procure through authorized partners like itmall.sale to avoid counterfeit modules responsible for 31% of DWDM link failures.
Integration with Cisco’s Optical Ecosystem
- Phase 1: Deploy Cisco NCS 2000 with Cisco Crosswork Network Controller for automated wavelength provisioning.
- Phase 2: Implement Cisco Network Insights Platform for ML-driven nonlinear noise prediction.
- Phase 3: Enable Cisco IOS XR Optical Encryption using AES-256-GCM on OTN frames (ITU-T G.709.3).
A North American operator reduced wavelength activation time from 45 minutes to 2.3 minutes using this stack.
Future-Proofing and Roadmap Alignment
Cisco’s Optical Networking Roadmap 2025 highlights:
- Q4 2024: 800G-ZR support via probabilistic shaping (PCS-64QAM)
- Q2 2025: Post-quantum cryptography integration (CRYSTALS-Kyber)
- Compliance: ITU-T G.709.5 (2026) pre-certification for adaptive rate transponders
Strategic Insights for Network Architects
While transformative for capacity scaling, the ONS-CFP2WDM-BUN4’s 64QAM mode demands pre-FEC BER monitoring—Cisco SEs recommend deploying Viavi OSA 5410 for real-time margin tracking. During field trials, 14% of modules exhibited wavelength drift beyond ITU-T G.694.1 specs in uncontrolled temperature environments; always enforce ASHRAE A2 thermal guidelines.
The module’s true value emerges in multi-vendor ROADM networks, where its OpenROADM 3.0 compliance reduces integration costs by 55%. However, enterprises must budget for Cisco-certified fiber characterization—undocumented chromatic dispersion slopes caused 9% of post-deployment performance issues.
Final Perspective: The ONS-CFP2WDM-BUN4 redefines optical efficiency, but its complexity demands operational maturity. Carriers who master its adaptive modulation capabilities will dominate the terabit economy, while others risk drowning in spectral chaos. The line between groundbreaking ROI and costly overengineering lies in precise alignment with traffic growth projections—overprovisioning today could strand tomorrow’s capacity.