Cisco QSFP-BX20-100G Compatible 100G QSFP28 BX20-D Transceiver Module 20km 1310nm-TX/1280nm-RX
The QSFP-BX20-100G compatible module serves equipment requiring a 100G QSFP28 interface with 1310nm-TX/1280nm-RX optics and a 20km rating. Connection is through Simplex LC. Product data, application guidance and factory verification are presented together to support procurement teams match an equipment parts list to a clearly defined optical product.
OEM Part Number: QSFP-BX20-100GHT Part Number: QSFP-BX20-100G
Product Highlights
- Compatible alternative to Cisco QSFP-BX20-100G
- 100G connectivity at 103.1Gbps
- Optical wavelength: 1310nm-TX/1280nm-RX
- Specified reach: 20km
- Simplex LC / SMF interface
- Digital diagnostic monitoring: Supported
- Operating temperature: -20 to 85°C
Specifications
| HT Part Number | QSFP-BX20-100G |
|---|---|
| Manufacturer | HT |
| Form Factor | QSFP28 |
| Max Data Rate | 103.1Gbps |
| Wavelength | 1310nm-TX/1280nm-RX |
| Max Cable Distance | 20km |
| Connector | Simplex LC |
| Media | SMF |
| Transmitter Type | DFB |
| Receiver Type | PIN |
| TX Power | -4.3~4.5dBm |
| Minimum Receiver Power | -14.5dBm |
| Max Power Budget | 13dB |
| Receiver Overload | 4.5dBm |
| Power Consumption | ≤5W |
| Extinction Ratio | >4dB |
| DDM/DOM | Supported |
| Extended Temperature Range | -20 to 85°C |
| Modulation (Electrical) | 4x 25G-NRZ |
| Modulation (Optical) | 4x 25G-NRZ |
| Protocols | QSFP28 MSA |
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 100G interface configuration must match the remote equipment; sharing a QSFP28 housing alone does not make two transceiver types interoperable.
BiDi operation saves a fiber strand but makes wavelength orientation critical. Record the part installed at each end and check its paired receive wavelength. The 20km rating still depends on total channel loss, including connectors and splices.
Optical Acceptance, Diagnostics and Handling
For this model, the specified transmit-power range is -4.3~4.5dBm. During commissioning, record the host diagnostic readings after the link has stabilized and compare them with those limits. DOM values are useful operational indicators, but they do not replace calibrated optical measurements when a link is marginal. Investigate unexpected loss through connector inspection, cleaning and a channel measurement before replacing the module. 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.
Procurement and Asset Identification
A useful purchase order identifies the host platform, expected OEM code and optical standard separately. This prevents a module with the same housing but another wavelength, reach or identification profile from being substituted. For mixed deployments, keep one order line per OEM reference and reconcile each received unit with its intended port. For this model, the principal parameters are data rate 103.1Gbps, wavelength 1310nm-TX/1280nm-RX, rated reach 20km.
Cisco Compatibility and Factory Testing
Factory verification starts with the expected QSFP-BX20-100G identity and finishes with an operating host link. EEPROM data, diagnostic visibility and the stated optical parameters are assessed together. Equipment model, hardware revision and software release can be reviewed before dispatch where platform behavior is uncertain.
Ordering Information
Use QSFP-BX20-100G as the compatibility cross-reference and QSFP-BX20-100G as the HT ordering identity. Keep other reaches or wavelength directions on separate order lines. Neutral labels, customer packaging and project-specific compatibility review are available on request.
Quality Assurance and Packaging
Each QSFP-BX20-100G 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 QSFP-BX20-100G, 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.
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.