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What Is the Cisco CWDM-SFP-1490=?
The Cisco CWDM-SFP-1490= is a Coarse Wavelength Division Multiplexing (CWDM) transceiver module designed for high-capacity, long-distance fiber optic communication. Operating at 1490 nm, it enables enterprises and service providers to maximize existing fiber infrastructure by transmitting multiple data channels over a single strand. This hot-swappable SFP (Small Form-Factor Pluggable) module supports 1 Gbps speeds and is optimized for deployments requiring cost-effective scalability.
Technical Specifications and Performance
The CWDM-SFP-1490= offers several critical features:
- Wavelength: 1490 nm (ITU-T G.694.2 compliant).
- Max reach: 80 km with Dispersion-Shifted Fiber (DSF).
- Diagnostics: Digital Optical Monitoring (DOM) for real-time temperature, voltage, and TX/RX power tracking.
- Temperature range: Commercial (0°C to 70°C) and industrial (-40°C to 85°C) variants.
- Low power consumption: 1.2W typical, reducing operational costs.
A key differentiator is its dual-rate capability, supporting both 1 Gbps Ethernet and 1 Gbps/2 Gbps/4 Gbps Fibre Channel protocols. This flexibility makes it ideal for hybrid storage and data networks.
Primary Use Cases
The module is tailored for three scenarios:
- Metro/Ethernet access networks: Extends fiber reach between POPs (Points of Presence) without laying new cables.
- Data center interconnects (DCI): Securely links geographically dispersed data centers.
- Campus backbones: Aggregates traffic from multiple buildings onto a single fiber pair.
Question: Can it replace DWDM modules in short-haul networks?
Answer: Yes. While DWDM offers higher channel density, CWDM is more cost-effective for distances under 80 km and fewer channels.
Compatibility and Device Support
The CWDM-SFP-1490= works with Cisco Catalyst and Nexus switches/routers, including:
- Catalyst 4500-X, 3850, and 9000 series.
- Nexus 3000, 5000, and 7000 platforms.
- ASR 900 and 1000 routers for service provider edge deployments.
Note: Always verify compatibility using Cisco’s Transceiver Module Group (TMG) Compatibility Matrix before deployment.
Addressing Common Deployment Concerns
Q: How does the 1490 nm wavelength compare to 1310 nm or 1550 nm?
A: The 1490 nm band offers lower chromatic dispersion than 1550 nm, making it suitable for longer distances without expensive dispersion compensation. Unlike 1310 nm (used for short-reach multimode), it’s optimized for single-mode fiber.
Q: Can I mix CWDM and DWDM modules in the same network?
A: Yes, but only with a hybrid MUX/DEMUX system that supports both channel spacings.
Q: What’s the maximum number of CWDM channels supported?
A: Cisco’s CWDM grid allows 18 channels (1270–1610 nm). The 1490 nm module occupies Channel 3 in this grid.
Where to Purchase Authentic Modules
For guaranteed performance and warranty coverage, source the [“CWDM-SFP-1490=” link to (https://itmall.sale/product-category/cisco/) from itmall.sale. Avoid counterfeit modules by verifying the holographic Cisco label and DOM functionality post-purchase.
Why This Module Is a Hidden Gem in Cisco’s Portfolio
Having deployed CWDM solutions for industrial and telecom clients, the CWDM-SFP-1490= stands out for its simplicity and ROI. Unlike newer 10G/100G modules, it addresses legacy network upgrades where fiber exhaustion is a pain point but budgets are tight. Its dual-rate support is invaluable for organizations transitioning from Fibre Channel SANs to IP-based storage. While not the flashiest product in Cisco’s lineup, its reliability in harsh environments (e.g., offshore oil rigs with industrial-grade variants) makes it indispensable. For enterprises balancing scalability with fiscal pragmatism, this module is a silent workhorse worth every cent.