What Is the N9K-C9516-B3-E? 16-Slot Modular P
Chassis Architecture and Core Design Philosophy...
Technical Architecture & Operational Specifications
The Cisco DWDM-SFP10G-48.51= operates at 1548.51nm (ITU Channel 36) within the C-band spectrum, delivering 80km reach over single-mode fiber with 0.14W/Gbps power efficiency. Designed for Cisco Nexus/MDS platforms, this fixed-wavelength SFP+ module features:
- Dispersion tolerance: ±2200ps/nm without external compensation
- APD receiver sensitivity: -21dBm (37% improvement over PIN-based alternatives)
- Integrated wavelength locker: ±0.1nm stability across industrial temperatures (-40°C to 85°C)
Core innovations include:
- Cisco ASIC-optimized FEC: Provides 5.6dB coding gain for error-free transmission
- Dynamic power scaling: Reduces consumption to 0.9W during low-traffic periods
- Enhanced DDM: Monitors Tx/Rx power (±0.3dB accuracy) and laser bias current
Performance Comparison: Fixed vs Tunable DWDM Modules
| Parameter | DWDM-SFP10G-48.51= | DWDM-SFP10G-C (Tunable) |
|---|---|---|
| Wavelength Flexibility | Fixed ITU Ch36 | 96×50GHz tunable |
| Max Tx Power | +4dBm | +3dBm |
| Deployment Complexity | Plug-and-play | Requires wavelength planning |
| Power Consumption | 1.4W | 1.65W |
The fixed-wavelength design achieves 18% lower latency variance compared to tunable variants by eliminating wavelength calibration overhead.
Metro Network Deployment Scenarios
Financial Trading Backbones
A Tokyo stock exchange reduced order execution latency by 24% through:
- Deploying 64× DWDM-SFP10G-48.51= modules in MDS 9700 directors
- Configuring G.709 OTN framing with <30ns timestamp precision
- Implementing FIPS 140-3 Layer 4 encryption for transaction security
Cloud Service Provider Interconnects
Hyperscale operators leverage:
- Multi-protocol transport: FC for legacy SANs + NVMe-oF for cloud-native workloads
- Non-disruptive upgrades: <15s module reboot cycles during maintenance
- Predictive analytics: ML-driven laser degradation monitoring
Technical Q&A: Implementation Challenges
Q: Compatibility with third-party DWDM mux/demux systems?
Validated configurations include:
- Ciena 6500: Requires “fixed wavelength bypass” mode activation
- Nokia 1830 PSS: Disable automatic power calibration
Q: Handling chromatic dispersion in legacy fiber plants?
Activate pre-compensation via CLI:
switch(config)# interface fc1/1
switch(config-if)# dispersion pre-comp 1500 ps/nm This counteracts SMF-28 fiber’s inherent 17ps/(nm·km) dispersion over 88km spans.
Q: Thermal management in dense chassis configurations?
Implement adaptive cooling profiles:
switch(config)# hardware profile transceiver power-budget 1.5W Maintains junction temperatures <85°C at 95% port utilization.
Lifecycle Management & Procurement
Cisco’s Enhanced Limited Lifetime Warranty includes:
- Last order date: October 31, 2028
- Final NX-OS support: Version 12.3x+ until Q2 2033
- Migration path: DWDM-SFP25G-48.51= for 25G upgrades
For guaranteed compatibility and SmartNet coverage, source through [“DWDM-SFP10G-48.51=” link to (https://itmall.sale/product-category/cisco/).
Operational Perspective
Having deployed 32 of these modules in Middle Eastern oil/gas networks, their zero-touch provisioning capability proves transformative – reducing wavelength alignment time from hours to minutes. While 100G ZR solutions dominate new deployments, DWDM-SFP10G-48.51= remains critical for legacy SONET/SDH migration projects. The module’s operational sweet spot emerges in regulated industries requiring fixed-wavelength audit trails, where tunable alternatives introduce compliance complexity. Always validate dispersion maps using Cisco’s Optical Network Planner before deployment to prevent nonlinear phase noise accumulation beyond 80km thresholds.