10/100BASE-T SFPCisco CWDM-SFP-1270 Compatible 1G SFP Transceiver Module 40km
The CWDM-SFP-1270 compatible module serves equipment requiring a 1G SFP interface with 1270nm optics and a 40km rating. Connection is through Duplex LC. Product data, application guidance and factory verification are presented together to support structured fiber installations preserve a documented and serviceable optical channel.
OEM Part Number: CWDM-SFP-1270HT Part Number: CW-SFP1G40-27
Product Highlights
- Compatible alternative to Cisco CWDM-SFP-1270
- 1G connectivity at 1000Mbps
- Optical wavelength: 1270nm
- Specified reach: 40km
- Duplex LC / SMF interface
- Digital diagnostic monitoring: Supported
- Operating temperature: 0 to 70°C (32 to 158°F)
Specifications
| Cisco Compatible | CWDM-SFP-1270 |
|---|---|
| Manufacturer | HT |
| HT Part Number | CW-SFP1G40-27 |
| Form Factor | SFP |
| Max Data Rate | 1000Mbps |
| Wavelength | 1270nm |
| Max Cable Distance | 40km |
| Connector | Duplex LC |
| Media | SMF |
| Transmitter Type | DFB CWDM |
| Receiver Type | PIN |
| Receiver Sensitivity | <-24dBm |
| SMSR | 30dB |
| TX Power | -5~0dBm |
| RX Power | -24~-1dBm |
| Power Consumption | ≤1W |
| Power Budget | 19dB |
| EMC (Electro Magnetic Comnatihilitv) | Supported |
| DDM/DOM | Supported |
| Commercial Temperature Range | 0 to 70°C (32 to 158°F) |
| Protocols | SFP MSASFF-8472 |
Applications and Optical Link Design
Use this module for equipment interconnection over the specified single-mode fiber plant, including enterprise backbone, campus, metro or data-center interconnect links according to its rated distance. Confirm that both ends use the same optical standard and wavelength plan, and allow for connector, splice and patch-panel loss within the stated power budget.
Before deployment, check the host port type, supported data rate and firmware requirements. The 1G interface configuration must match the remote equipment; sharing a SFP housing alone does not make two transceiver types interoperable.
Wavelength-selective links require the exact channel plan at both ends. Confirm that filters pass 1270nm, then include their insertion loss in the 40km power budget. A nearby channel is not a substitute for the specified wavelength.
Cisco Compatibility and Factory Testing
Compatibility testing for CWDM-SFP-1270 combines identification with a live link and available transmit, receive and alarm information. Connector condition is inspected separately. Equipment model, hardware revision and software release can be reviewed before dispatch where platform behavior is uncertain.
Optical Acceptance, Diagnostics and Handling
For this model, the specified transmit-power range is -5~0dBm; receiver sensitivity is <-24dBm; the stated optical power budget is 19dB. Digital diagnostics make later maintenance easier when baseline values are captured at installation. Save the initial readings with the port and OEM reference, then investigate meaningful changes rather than reacting to a single transient value. Diagnostic support depends on the host as well as the module, so unavailable fields should be confirmed with the platform documentation. Diagnostic monitoring is listed as Supported. Before every insertion, keep dust caps in place until the patch lead is ready, avoid touching the optical end face and use an appropriate inspection and cleaning procedure. Do not look into an active optical interface.
Structured Fiber Pathways and Serviceability
Treat the transceiver as part of the complete channel. Follow the intended patch-panel route, maintain bend control and leave service access around the port. Confirm connector polish and fiber type at every mated pair; a documented service allowance is preferable to excess slack concealed inside a rack. For this model, the principal parameters are data rate 1000Mbps, wavelength 1270nm, rated reach 40km.
Ordering Information
When ordering, specify CWDM-SFP-1270, CW-SFP1G40-27, quantity and intended host platform. Project labels can repeat these details for receiving and asset records. Neutral labels, customer packaging and project-specific compatibility review are available on request.
Shipping and Lead Time
Standard configurations normally ship within one to three working days, with production lead times confirmed for larger quantities. International courier, air freight and sea freight are available; customer courier accounts and nominated forwarders are accepted.
Quality Assurance and Packaging
Each CWDM-SFP-1270 compatible module is inspected, powered up and functionally checked before protective packing. Dust caps and individual trays shield the interface during transport. Customer references, rack groups and project packing lists can be added for volume orders.
Frequently Asked Questions
Is this an original Cisco transceiver?
No. It is an HT-manufactured compatible alternative for equipment that specifies CWDM-SFP-1270, not an original Cisco-branded module.
Which fiber and connector are required?
Use Duplex LC with SMF. The specified maximum reach is 40km, subject to fiber quality and total link loss.
Can it be mixed with another wavelength or reach version?
Only when the two ends share the same optical standard, wavelength plan and supported data rate. Check the exact part numbers and link budget rather than relying only on the module form factor.
