Cisco SFP-25GBX-D-20 Compatible 25G SFP28 D Transceiver Module
Built for hosts recognizing SFP-25GBX-D-20, this HT-manufactured SFP28 module delivers 25G transmission at 1330nm-TX/1270nm-RX. Its rated reach is 20km, with Simplex LC as the physical interface. The specifications and engineering guidance below support project teams keep OEM references, delivery records and port schedules aligned, while keeping HT manufacture separate from the OEM cross-reference.
OEM Part Number: SFP-25GBX-D-20HT Part Number: SFP-25G32-BX20
Product Highlights
- Compatible alternative to Cisco SFP-25GBX-D-20
- 25G connectivity at 25.78Gbps
- Optical wavelength: 1330nm-TX/1270nm-RX
- Specified reach: 20km
- Simplex LC / SMF interface
- Digital diagnostic monitoring: Supported
- Operating temperature: 0 to 70°C (32 to 158°F)
Specifications
| Cisco Compatible | SFP-25GBX-D-20 |
|---|---|
| Manufacturer | HT |
| HT Part Number | SFP-25G32-BX20 |
| Form Factor | SFP28 |
| Max Data Rate | 25.78Gbps |
| Wavelength | 1330nm-TX/1270nm-RX |
| Max Cable Distance | 20km |
| Connector | Simplex LC |
| Media | SMF |
| Transmitter Type | DFB BiDi |
| Receiver Type | PIN |
| TX Power | 0~6dBm |
| Receiver Sensitivity | <-14dBm |
| Power Budget | 14dB |
| Receiver Overload | 2.5dB |
| Power Consumption | ≤1.2W |
| Extinction Ratio | 3.5dB |
| DDM/DOM | Supported |
| Commercial Temperature Range | 0 to 70°C (32 to 158°F) |
| CDR | TX and RX |
| Protocols | eCPRI, SFF-8472, SFF-8432, SFF-8431 |
Project Documentation and Traceability
Large deployments are easier to audit when the order code, optical standard and endpoint record agree. Keep the OEM reference in the compatibility document and the HT part number on the packing list. Labels and carton groups can be arranged by rack or port plan so installers need not identify modules by appearance. For this model, the principal parameters are data rate 25.78Gbps, wavelength 1330nm-TX/1270nm-RX, rated reach 20km.
Cisco Compatibility and Factory Testing
The module is checked for host recognition as SFP-25GBX-D-20, link establishment and diagnostic reporting. Physical cage fit alone is not treated as evidence of compatibility. Equipment model, hardware revision and software release can be reviewed before dispatch where platform behavior is uncertain.
Applications and Optical Link Design
This BiDi interface is useful where only one fiber strand is available between two sites or racks. It must be paired with the complementary wavelength direction: one end transmits on the wavelength that the other end receives. Verify the paired part number, connector polish and fiber plant before installation, and measure link loss against the specified optical budget.
Before deployment, check the host port type, supported data rate and firmware requirements. The 25G interface configuration must match the remote equipment; sharing a SFP28 housing alone does not make two transceiver types interoperable.
This single-fiber interface must be paired with the complementary wavelength direction. One end transmits on the wavelength the other receives. Verify connector polish and measure loss over the 20km design range before service.
Optical Acceptance, Diagnostics and Handling
For this model, the specified transmit-power range is 0~6dBm; receiver sensitivity is <-14dBm; the stated optical power budget is 14dB. 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.
Frequently Asked Questions
Is this an original Cisco transceiver?
No. It is an HT-manufactured compatible alternative for equipment that specifies SFP-25GBX-D-20, not an original Cisco-branded module.
Which fiber and connector are required?
Use Simplex LC with SMF. The specified maximum reach is 20km, 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.
Ordering Information
When ordering, specify SFP-25GBX-D-20, SFP-25G32-BX20, 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
Quality control covers the optical or electrical interface, host identification and operating link. The verified unit is then individually protected and cartoned. Customer references, rack groups and project packing lists can be added for volume orders.
