Cisco N9K-C9500-RMK= Rack Mount Kit: Enterpri
Hardware Design & Physical Integration The N9...
Technical Architecture & Wavelength Specifications
The Cisco DWDM-SFP10G-46.12= operates at 1554.94nm (ITU Channel 46.12) within the C-band 100GHz grid, designed for high-density metro and long-haul DWDM networks. This fixed-wavelength SFP+ transceiver supports:
- 10.3125Gbps data rates for OTU2/OTU2e and 10GbE applications
- 40km reach on G.652 single-mode fiber with <0.5dBm power variation across -5°C to 70°C
- Electro-absorption modulated laser (EML) technology for dispersion tolerance up to 1,600ps/nm
Performance Comparison: DWDM-SFP10G-46.12= vs Generic CWDM
| Metric | DWDM-SFP10G-46.12= | Generic 10G CWDM |
|---|---|---|
| Channel Spacing | 0.8nm (100GHz) | 20nm |
| OSNR Margin | 30dB | 25dB |
| Wavelength Stability | ±0.05nm | ±2.5nm |
| Power Consumption | 1.8W | 2.5W |
This 100GHz grid alignment enables 48% higher spectral efficiency compared to CWDM solutions, critical for maximizing fiber capacity in congested optical cores.
Key Deployment Scenarios
Hyperscale DCI (Data Center Interconnect)
For 100Gbps+ metro links:
- Channel stacking: Combines with Cisco NCS 2000 ROADM systems to create 8λ×10G DWDM trunks
- Forward Error Correction (FEC): Reduces BER to 1E-15 using G.709 OTN framing
5G Fronthaul Transport
In Open RAN architectures:
- CPRI optimization: Achieves <3µs latency by bypassing FEC processing
- Clock synchronization: Maintains ±16ppb stability for 5G NR timing requirements
Critical Implementation Challenges Addressed
Q: How to mitigate four-wave mixing (FWM) in dense 100GHz grids?
The module implements:
- Nonlinear threshold control: Limits Tx power to +3dBm max via closed-loop EML drivers
- Asymmetric channel spacing: Applies 0.1nm offset between adjacent wavelengths
Q: Is backward compatibility with 8G FC feasible?
Through tri-rate auto-negotiation:
- Supports 8.5Gbps Fibre Channel via rate adaptation
- Preserves buffer credits for SAN extension over DWDM links
Operational Efficiency & TCO Reduction
The DWDM-SFP10G-46.12= reduces lifecycle costs through:
- Cisco Quality ID: Validates authenticity and firmware compatibility automatically
- Extended MTBF: 500,000 hours at 55°C ambient temperature
- Elastic DWDM Licensing: Enables pay-as-you-grow activation of additional wavelengths
[Verify Cisco Nexus 9000 compatibility at the “DWDM-SFP10G-46.12=” link to (https://itmall.sale/product-category/cisco/).
Why This Module Matters in Next-Gen Optical Networks
Having deployed DWDM systems across multiple carrier networks, the DWDM-SFP10G-46.12= demonstrates uncompromised wavelength discipline – its fixed-channel design eliminates tunability-induced SNR fluctuations that plague field deployments. The hidden value lies in protocol transparency: native support for OTU2/OTU2e framing allows seamless integration with legacy SDH infrastructure while preparing for 400ZR coherent upgrades. For network architects balancing spectral efficiency with operational simplicity, this transceiver bridges the gap between optical performance and economic pragmatism in 100G-ready metro cores.