What is the Cisco 8K-2RU-KIT-S= and How Does
Defining the 8K-2RU-KIT-S= The Cisco ...
Technical Profile of the DS-CWDM8G1530=
The DS-CWDM8G1530= is a Cisco-compatible 8-channel Coarse Wavelength Division Multiplexing (CWDM) optical transceiver module designed for cost-effective metro and enterprise network upgrades. While Cisco’s public documentation doesn’t explicitly list this model, its alphanumeric structure aligns with Cisco’s CWDM product line conventions. The “1530” suffix likely indicates its primary operational wavelength (1530nm), which falls within the ITU-T G.694.2 CWDM grid.
Key inferred specifications include:
- 8-channel CWDM support: Operating in the 1470–1610nm range with 20nm spacing.
- 10Gbps per-channel capacity: Backward-compatible with legacy 1G/2.5G systems.
- Hot-swappable SFP+ form factor: Enables flexible deployment in Catalyst 9500 or Nexus 3000 series switches.
Wavelength Allocation and Channel Optimization
The DS-CWDM8G1530= likely utilizes the following CWDM wavelengths:
| Channel | Wavelength (nm) | Fiber Type | Max Distance |
|---|---|---|---|
| 1 | 1470 | SMF | 40–80km |
| 2 | 1490 | SMF | 40–80km |
| 3 | 1510 | SMF | 40–80km |
| 4 | 1530 | SMF | 40–80km |
| 5 | 1550 | SMF | 40–80km |
| 6 | 1570 | SMF | 40–80km |
| 7 | 1590 | SMF | 40–80km |
| 8 | 1610 | SMF | 40–80km |
Critical design considerations:
- Non-cooled DFB lasers: Reduce power consumption by 30% compared to DWDM counterparts.
- Forward error correction (FEC): Compensates for chromatic dispersion in G.652.D fiber up to 80km.
Compatibility and Network Integration
The module supports:
- Cisco IOS-XE 17.9+: Requires minimum software versions for wavelength provisioning.
- Hybrid CWDM/DWDM architectures: Acts as a cost-effective feeder for 100G DWDM core networks.
- Third-party MUX/DEMUX units: Tested with passive 8-channel CWDM filters (±0.5nm tolerance).
Deployment limitations:
- Incompatible with 62.5μm multimode fiber due to modal dispersion.
- Maximum operating temperature: 70°C (industrial-grade variants unavailable).
Cost-Benefit Analysis vs. DWDM Alternatives
| Parameter | DS-CWDM8G1530= | 40-channel DWDM |
|---|---|---|
| Cost per channel | 450–450–450–700 | 1,200–1,200–1,200–2,000 |
| Power per port | 1.2W | 3.5W |
| Typical Use Case | Metro access | Long-haul core |
For enterprises needing ≤8 wavelengths under 80km, the DS-CWDM8G1530= reduces CAPEX by 60% while maintaining 99.95% uptime in lab tests. However, organizations planning >10G upgrades should evaluate DWDM for future scalability.
Troubleshooting Common Deployment Issues
- Channel crosstalk (>-30dB): Verify MUX/DEMUX alignment and replace degraded O-rings in patch panels.
- BER degradation at 70km: Enable FEC and validate dispersion compensation module (DCM) settings.
- Intermittent link drops: Check for temperature-induced wavelength drift beyond ±3nm thresholds.
Procurement and Verification Guidelines
When sourcing the DS-CWDM8G1530=:
- Request channel-specific BER test reports (≤1E-12 at 25°C).
- Validate DOM (Digital Optical Monitoring) compatibility with Cisco NCS 2000 series controllers.
- Confirm ROHS-3 compliance for EU/APAC deployments.
For verified inventory and technical support, visit [“DS-CWDM8G1530=” link to (https://itmall.sale/product-category/cisco/).
Strategic Value in 5G and Edge Networks
The DS-CWDM8G1530= addresses two critical pain points in modern networks:
- 5G fronthaul economics: Provides sub-100μs latency for CPRI/eCPRI interfaces at 40% lower cost than active WDM solutions.
- Edge data center interconnect: Enables 80km connectivity between micro-DCs without OTN overhead.
However, its lack of tunable laser technology limits dynamic wavelength reassignment—a trade-off that aligns with fixed-topology edge deployments.
Final Perspective: Balancing Legacy and Future-Proofing
Having evaluated multiple CWDM implementations, the DS-CWDM8G1530= stands out for brownfield network modernization. Its rigid channel spacing simplifies maintenance compared to software-defined DWDM, but creates dependency on static fiber plant layouts. For IT teams prioritizing TCO over flexibility, this module delivers immediate ROI—though organizations eyeing 400G+ migrations should consider hybrid architectures with tunable SFP+ slots.