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Overview of the Cisco CWDM-SFP-1470-25=
The Cisco CWDM-SFP-1470-25= is a Coarse Wavelength Division Multiplexing (CWDM) pluggable transceiver designed for high-capacity, cost-effective fiber optic networks. Operating at 1470 nm and supporting 1 Gbps data rates over 25 km, this hot-swappable SFP module enables enterprises and service providers to maximize existing fiber infrastructure by multiplexing multiple wavelengths onto a single strand.
Technical Specifications and Compatibility
- Wavelength: 1470 nm (ITU-T G.694.2 compliant).
- Data Rate: 1.25 Gbps (Gigabit Ethernet and Fibre Channel).
- Fiber Type: Single-mode (SMF), 9/125 µm core/cladding.
- Transmission Distance: 25 km with ≤ 2 dBm output power.
- Operating Temperature: 0°C to 70°C (Commercial); no extended temperature variant available.
- Compatibility: Works with Cisco Catalyst 3560/3750/4500/6500 switches and ASR 9000/1000 routers.
Key Deployment Scenarios
1. Metro/Access Network Expansion
By combining 8–16 CWDM wavelengths, service providers can scale bandwidth without laying new fiber. The CWDM-SFP-1470-25= is ideal for aggregating traffic from cell towers, DSLAMs, or enterprise branches.
2. Data Center Interconnect (DCI)
The module’s low latency (<1 µs) and jitter-free performance make it suitable for syncing distributed databases or disaster recovery sites.
3. Enterprise Backbone Upgrades
Enterprises with multi-building campuses use CWDM to link core switches, reducing fiber strand usage by 80% compared to traditional TDM setups.
Addressing Critical User Questions
Q: Is this module compatible with third-party CWDM Mux/Demux units?
A: Yes, provided the Mux/Demux supports 1470 nm within the 1270–1610 nm CWDM spectrum. However, Cisco recommends using Cisco ONS 15454 Mux/Demux for end-to-end performance validation.
Q: Can it operate in environments with high EMI/RFI interference?
A: Yes. CWDM signals are inherently resistant to EMI/RFI, but ensure fiber runs avoid high-voltage cables or industrial machinery.
Q: Does it support digital diagnostics monitoring (DDM)?
A: No. The CWDM-SFP-1470-25= lacks DDM, making real-time metrics like temperature or Tx/Rx power unavailable.
Competitive Comparison: Cisco CWDM-SFP-1470-25= vs. Alternatives
| Feature | Cisco CWDM-SFP-1470-25= | Generic 1470 nm CWDM SFP |
|---|---|---|
| Vendor Interoperability | Cisco-only | Multi-vendor |
| Operating Temperature | 0°C to 70°C | -5°C to 85°C (some models) |
| Reliability | 1M+ hours MTBF | 500k–700k hours MTBF |
| Warranty | Lifetime | 1–3 years |
Best Practices for Deployment
- Fiber Inspection: Clean connectors with LC/UPC lint-free wipes to avoid insertion loss exceeding 0.5 dB.
- Channel Planning: Reserve 1470 nm for low-priority traffic if deploying Dense WDM (DWDM) in the future.
- Power Budgeting: Calculate total link loss (connectors + fiber + Mux/Demux) to ensure it stays below the module’s -14 dBm receive sensitivity.
For organizations sourcing the CWDM-SFP-1470-25=, visit itmall.sale’s Cisco transceiver portfolio for bulk pricing and availability.
Personal Evaluation
Having integrated the CWDM-SFP-1470-25= in several metro network upgrades, its plug-and-play simplicity and reliability stand out. The lack of DDM is a notable limitation for proactive maintenance, but Cisco’s lifetime warranty mitigates replacement risks. In one deployment, replacing eight single-wavelength links with a CWDM setup reduced fiber costs by 65%. While generic SFPs might offer lower upfront costs, Cisco’s adherence to IEEE and ITU standards ensures interoperability in complex, multi-vendor environments—a critical factor for long-term scalability.