SFP-GE-120-SM1550-AH3C SFP-GE-120-SM1550-A Compatible 1G SFP Transceiver Module
The SFP-GE-120-SM1550-A compatible module serves equipment requiring a 1G SFP interface with 1550nm-TX/1490nm-RX optics and a 120km rating. Connection is through Simplex 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: SFP-GE-120-SM1550-AHT Part Number: SFP-1G54-BX120
Product Highlights
- Compatible alternative to H3C SFP-GE-120-SM1550-A
- 1G connectivity at 1.25Gbps
- Optical wavelength: 1550nm-TX/1490nm-RX
- Specified reach: 120km
- Simplex LC / SMF interface
- Operating temperature: 0 to 70°C (32 to 158°F)
- Factory compatibility verification and optical performance testing before shipment
Specifications
| H3C Compatible | SFP-GE-120-SM1550-A |
|---|---|
| Manufacturer | HT |
| HT Part Number | SFP-1G54-BX120 |
| Form Factor | SFP |
| Max. Data Rate | 1.25Gbps |
| Wavelength | 1550nm-TX/1490nm-RX |
| Max Cable Distance | 120km |
| Connector | Simplex LC |
| Optical Components | DFB BiDi |
| Media | SMF |
| DOM Support | Yes |
| TX Power | -1~4dBm |
| Receiver Sensitivity | <-31dBm |
| Commercial Temperature Range | 0 to 70°C (32 to 158°F) |
| Protocols | Fast Ethernet, Gigabit Fibre Channel, MSA Compliant |
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 1G interface configuration must match the remote equipment; sharing a SFP 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 120km rating still depends on total channel loss, including connectors and splices.
H3C Compatibility and Factory Testing
Factory verification starts with the expected SFP-GE-120-SM1550-A 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.
Optical Acceptance, Diagnostics and Handling
For this model, the specified transmit-power range is -1~4dBm; receiver sensitivity is <-31dBm. 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. 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 1.25Gbps, wavelength 1550nm-TX/1490nm-RX, rated reach 120km.
Ordering Information
Quote HT part number SFP-1G54-BX120 together with OEM reference SFP-GE-120-SM1550-A and quantity. Add the host model and software release when pre-order verification is required. 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.
Frequently Asked Questions
Is this an original H3C transceiver?
No. It is an HT-manufactured compatible alternative for equipment that specifies SFP-GE-120-SM1550-A, not an original H3C-branded module.
Which fiber and connector are required?
Use Simplex LC with SMF. The specified maximum reach is 120km, 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.
