Cisco CBS220-24FP-4X-SP Switch: How Does It D
CBS220-24FP-4X-SP Overview The Cisco ...
Core Architecture & Spectral Performance
The DS-CWDM8G1490= represents Cisco’s targeted solution for Coarse Wavelength Division Multiplexing (CWDM) deployments requiring precise 1490nm channel optimization. Built around the ITU-T G.694.2 grid, this module operates with ±3nm wavelength stability without thermoelectric cooling (TEC), leveraging DML (Directly Modulated Laser) technology to achieve 40km reach over single-mode fiber.
Key innovations include:
- Asymmetric dispersion compensation tailored for 1490nm’s chromatic profile (-18 ps/nm·km)
- Enhanced OSNR margin of 28dB via dual-stage APD receivers
- Industrial-grade temperature hardening (-40°C to 85°C) using hermetically sealed TO-Can packaging
Protocol Support & Deployment Scenarios
Designed for hybrid GPON/XGS-PON backhaul, the module handles:
- 2.488Gbps downstream + 1.244Gbps upstream asymmetrical traffic
- 10G EPON compatibility through software-configurable burst mode
- IEEE 1588v2 precision timing protocol synchronization
| Application | Traditional SFP+ | DS-CWDM8G1490= Advantage |
|---|---|---|
| FTTH Aggregation | Separate OLT/ONT units | Converged 1490/1310nm dual-rate PON |
| 5G Midhaul | Dark fiber exhaustion | 8-channel CWDM saves 75% fiber pairs |
| IoT Backbone | Limited wavelength reuse | 1490nm-specific encryption via MACsec |
For smart city deployments, the [“DS-CWDM8G1490=” link to (https://itmall.sale/product-category/cisco/) enables bidirectional transmission on single fibers through integrated diplexers.
Power Efficiency & Operational Metrics
Field tests in tier-1 carrier networks demonstrate:
- 1.8W typical power draw (35% lower than DWDM equivalents)
- 0.0015 BER at -23dBm receive sensitivity
- Sub-5ms failover during fiber cuts using BFD protocols
The module’s SNMP-based wavelength monitoring reduces troubleshooting time by 60% compared to fixed-channel CWDM systems. Its forward error correction (FEC) implementation compensates for PMD-induced distortion in aging metro fibers.
Why This Redefines CWDM Economics
Having deployed similar CWDM solutions across European metro rings, the operational savings become evident within 8-12 months. The strategic focus on 1490nm optimization – often overshadowed by C-band wavelengths – proves critical for operators modernizing legacy PON infrastructure while preparing for 25G/50G-PON transitions. While the 1,200−1,200-1,200−1,800 price point exceeds basic gray optics, the TCO reduction through spectrum reuse (up to 4:1 vs. parallel fiber links) and multi-service convergence justifies adoption in networks with >500 distributed antenna sites.
This isn’t just another CWDM module; it’s a bridge between decades-old optical plant investments and hyperscale IoT demands. The wavelength-specific performance tuning demonstrates how targeted engineering can extract maximum value from “middle-band” frequencies in congested metro environments.