1G SFP GLC-BX-20U 20km 1310nm-TX/1550nm-RX Simplex LC/UPC Module, Cisco

Designed for enterprise access, campus, telecom edge and industrial network environments, the 1G SFP GLC-BX-20U 20km 1310nm-TX/1550nm-RX Simplex LC/UPC Module, Cisco provides 1.25Gbps throughput in a SFP form factor. It operates at 1310nm-TX/1550nm-RX over SMF through a Simplex LC/UPC connector and supports link lengths up to 20km. The module meets Fast Ethernet, Gigabit Fibre Channel, MSA Compliant and includes digital diagnostic monitoring for live status readout.

Product Highlights

SFP form factor, 1.25Gbps data rate
Wavelength: 1310nm-TX/1550nm-RX
Connector: Simplex LC/UPC
Reach: up to 20km
Fiber media: SMF
DDM/DOM: Supported

Specifications

Cisco Compatible	GLC-BX-20U
Manufacturer	HT
Form Factor	SFP
Max. Data Rate	1.25Gbps
Wavelength	1310nm-TX/1550nm-RX
Max. Cable Distance	20km
Connector	Simplex LC/UPC
Media	SMF
Transmitter Type	DFB BiDi
Receiver Type	PIN
TX Power	-9~-3dBm
Minimum Receiver Power	<-20dBm
Power Budget	11dB
Receiver Overload	-3dBm
Max. Power Consumption	1W
Extinction Ratio	9dB
DDM/DOM	Supported
Commercial Temperature Range	0 to 70°C (32 to 158°F)
Bit Error Ratio (BER)	1E-12
Protocols	Fast Ethernet, Gigabit Fibre Channel, MSA Compliant

Applications

The 1G SFP GLC-BX-20U 20km 1310nm-TX/1550nm-RX Simplex LC/UPC Module, Cisco is used in enterprise access, campus, telecom edge and industrial network environments, where it provides a 1.25Gbps link over SMF up to 20km. The Simplex LC/UPC interface and 1310nm-TX/1550nm-RX optics match the standard cabling plant used in modern data halls, so existing trunks can be reused. For networks standardized on Cisco hardware, it is a drop-in equivalent of the GLC-BX-20U.

Standards and Compatibility

Compliance: Fast Ethernet, Gigabit Fibre Channel, MSA Compliant. For projects standardized on Cisco hardware, this product replaces the GLC-BX-20U directly, with identical fit and function. Every unit's EEPROM coding and link behavior are verified on real host equipment in our lab, so what arrives at your site is ready to use.

Ordering Information

Order this product as SFP-1G35-BX20. Common models are stocked for fast dispatch. We can supply the module with neutral or customer-branded labels, and compatibility coding for a specific equipment vendor can be added at no extra process step.

Factory Custom Capability

Working directly with the manufacturer means no middleman limits. We support OEM and ODM projects, custom cable assemblies, alternative packaging and compatibility coding for major equipment vendors, with engineering support from the same team that designs our standard products.

Worldwide Delivery

We ship to customers around the world every week. Express couriers handle most orders door to door in a few days; larger consignments go by air or sea to keep freight costs down. Tracking information is provided for every shipment, and we are flexible on shipping accounts and forwarders.

Tested Before Shipment

We do not ship untested stock. Each transceiver and cable is powered up in our test racks, checked for link stability, transmit power, receiver sensitivity and diagnostic readouts, and only then packed for delivery. This factory-level testing is one reason network integrators keep reordering from us year after year.

Packaging

Each unit is sealed in an anti-static bag, cushioned in a blister tray and boxed in an export-grade carton. Outer cartons carry handling marks and can be palletized for air or sea freight. If your project requires retail boxes, barcodes or your own brand on the label, we can arrange that as well.