The ​​CWDM-SFP-1490-25=​​ is a Cisco optical transceiver module designed for high-speed data transmission over fiber-optic networks. While official Cisco.com documentation is limited, this article aggregates verified technical insights and deployment best practices to clarify its role in modern network infrastructure.

​​Core Features of the CWDM-SFP-1490-25=​​

​​CWDM Technology​​: The module operates on the ​​1490 nm wavelength​​, part of the Coarse Wavelength Division Multiplexing (CWDM) spectrum. This allows multiple data channels to coexist on a single fiber, optimizing bandwidth utilization.

​​25 km Reach​​: Designed for ​​medium-distance communication​​, the transceiver supports connections up to 25 kilometers, making it ideal for metropolitan area networks (MANs) or campus links.

​​Hot-Swappable SFP Form Factor​​: The device complies with the ​​Small Form-Factor Pluggable (SFP) MSA standard​​, ensuring compatibility with Cisco switches and routers that support third-party optics.

​​Low Power Consumption​​: With an average power draw of ​​<1.5W​​, the module minimizes energy costs while maintaining high performance.

​​Diagnostics Monitoring​​: Built-in ​​Digital Optical Monitoring (DOM)​​ provides real-time data on temperature, voltage, and optical power levels for proactive maintenance.

​​Technical Specifications at a Glance​​

​​Key Applications and Use Cases​​

​​Telecom Backbone Networks​​

The CWDM-SFP-1490-25= is widely used in ​​metro Ethernet deployments​​, where its 25 km range bridges gaps between central offices and remote nodes without costly infrastructure upgrades.

​​Enterprise Data Centers​​

For businesses with geographically dispersed data centers, the module enables ​​high-speed interconnects​​ between storage arrays or server clusters over dark fiber.

​​ISP Uplinks​​

Internet Service Providers leverage CWDM technology to consolidate multiple client connections onto a single fiber pair, reducing cabling complexity and costs.

​​Addressing Common User Concerns​​

​​Q: Is the CWDM-SFP-1490-25= compatible with non-Cisco devices?​​
A: While designed for Cisco platforms, it works with any SFP slot that adheres to ​​MSA standards​​. However, firmware restrictions on some devices may require manual configuration.

​​Q: Can it support SONET/SDH protocols?​​
A: No. This transceiver is optimized for ​​Ethernet/IP traffic​​ (1GbE) and does not support legacy SONET/SDH frameworks.

​​Q: What happens if the 25 km limit is exceeded?​​
A: Signal degradation and packet loss will occur. For longer distances, consider ​​DWDM modules​​ or inline optical amplifiers.

​​Procurement and Deployment Tips​​

For guaranteed authenticity and warranty coverage, purchase the CWDM-SFP-1490-25= from authorized suppliers like [“CWDM-SFP-1490-25=” link to (https://itmall.sale/product-category/cisco/). Counterfeit modules often lack DOM support or fail prematurely under load.

​​Installation Best Practices​​

• Clean fiber connectors with ​​LC-compatible cleaning tools​​ before insertion.
• Verify ​​receive power levels​​ using DOM to ensure they fall within the receiver’s sensitivity range (-23 dBm to -3 dBm).
• Avoid bending fiber cables beyond the ​​30 mm bend radius​​ to prevent signal loss.

​​Why This Transceiver Still Matters in 2024​​

While newer 10G/100G solutions dominate headlines, the CWDM-SFP-1490-25= remains a cost-effective workhorse for legacy upgrades. Its ability to extend the lifespan of aging Gigabit networks—without overhauling fiber plants—makes it indispensable for budget-conscious enterprises. In regions where high-speed fiber rollout is slow, this module bridges the gap between today’s needs and tomorrow’s ambitions. For network architects balancing performance and frugality, dismissing CWDM could mean leaving stranded bandwidth on the table.