Cisco Compatible GLC-BX-U-80K SFP BiDi 1000BASE-BX-U

Introducing the Cisco Compatible GLC-BX-U-80K—an expertly engineered SFP transceiver designed to deliver precise, reliable 1000BASE-BX-U Bi-Directional (BiDi) connectivity over long-haul fiber. Built to be functionally identical to Cisco’s GLC-BX-U, this module is ideal for data centers, campus networks, and service-provider environments where performance, compatibility, and cost-efficiency matter. ENET’s commitment to quality and compatibility means you can deploy with confidence, knowing you’re getting a 100% guaranteed compatible solution at a fraction of the price of OEM parts. Whether you’re upgrading an existing Cisco deployment or expanding a multi-vendor network, the GLC-BX-U-80K offers the reliability and interoperability you expect from a trusted transceiver, without the premium price tag.

• Seamless Cisco compatibility and identical performance – Functionally identical to Cisco GLC-BX-U, this transceiver is designed for plug-and-play interoperability with Cisco switches and routers as well as a broad range of third-party devices. It’s tested to meet the expectations of enterprise networks and data centers that demand dependable, install-ready optics.
• Long-haul BiDi capability with Tx 1490nm / Rx 1550nm – Utilizes 1490 nm transmit and 1550 nm receive wavelengths on a single fiber, enabling efficient Bi-Directional data transmission over a single-mode fiber. This design supports up to 80 km, making it an excellent choice for inter-building links, remote data centers, and campus backbone connections.
• 1000BASE-BX-U SFP form factor with LC simplex connector – The compact SFP package fits standard SFP ports across a wide range of switches and routers. It uses a simple LC simplex connector, ensuring an easy patching experience with high-density fiber installations and minimal footprint in your rack or patch panel.
• Cost-effective, OEM-compatible optics – ENET offers a comprehensive line of OEM-compatible transceivers across dozens of manufacturers. These optics deliver the same performance and reliability as OEM parts at a fraction of the price, with a 100% guaranteed compatibility promise to help protect your network investment.
• Reliable performance with enterprise-grade design – engineered for stable operation in demanding networks, the GLC-BX-U-80K is built to handle continuous traffic, maintain solid link budgets, and deliver consistent throughput. It’s designed to minimize downtimes and simplify maintenance—an essential advantage for growing networks and multi-site deployments.

Technical Details of GLC-BX-U-80K

• SKU: GLC-BX-U-80K
• Data Rate: 1000BASE-BX-U
• Tx/Rx Wavelength: Tx 1490 nm / Rx 1550 nm
• Distance: Up to 80 km
• Fiber Type: Single-mode fiber (OS1/OS2 typical)
• Connector: LC Simplex
• Form Factor: SFP BiDi transceiver
• Compatibility: Cisco GLC-BX-U compatible; ENET OEM-compatible optics

How to Install GLC-BX-U-80K

• Prepare the network equipment – Ensure the switch or router port supports 1000BASE-BX-U SFP BiDi modules and that the device firmware is up to date. Verify that the port is configured for 1G operation and that the interface is enabled for use.
• Power down the device (if required) – While many SFP installations are hot-swappable, some platforms benefit from a brief power-down period. Refer to your device’s maintenance procedure if you are uncertain.
• Insert the SFP module – Align the GLC-BX-U-80K with the SFP slot and firmly seat it until the module’s latching mechanism clicks into place. Ensure the module is fully engaged and secured to prevent accidental disconnections.
• Connect the fiber patch cable – Attach a single-mode LC patch cord with LC simplex connectors to the SFP port on the device and to the corresponding port on the remote device. For BiDi operation, the Tx and Rx directions are managed through wavelengths on the same fiber, so simply linking two devices with an appropriate single-fiber patch is typical.
• Verify link and configure – Power up the equipment, and check the interface status to confirm a link has been established. Configure the interface for 1000 Mbps full-duplex operation if required by your network design. If link is not up, inspect fiber cleanliness, verify patch cord quality, and re-seat the module.

Frequently asked questions

• Is this module Cisco compatible? Yes. The GLC-BX-U-80K is designed to be functionally identical to Cisco’s GLC-BX-U and tested for reliable interoperability within Cisco-based networks and many other vendor environments.
• What type of fiber and distance does it support? It operates over single-mode fiber and supports up to 80 kilometers under typical single-mode conditions, depending on fiber quality, connectors, and equipment configuration.
• What wavelengths are used? The module uses 1490 nm for transmission and 1550 nm for reception, enabling efficient Bi-Directional communication on a single fiber via the BX-U standard.
• Can it be used in multi-vendor environments? Yes. ENET-compatible optics are designed to work across a broad range of devices and vendors, offering a cost-effective alternative without sacrificing performance or reliability.
• How do I troubleshoot if the link is not coming up? Begin by verifying the SFP is properly seated, confirming fiber continuity and cleanliness, ensuring the remote device is configured to 1 Gbps, and checking the fiber patch cable type. If issues persist, test with a known-good patch cord and, if possible, swap the SFP with another compatible module to isolate the problem.