- Cyber Security
How to Choose a Cyber Essentials Plus Certification Body
21 Jun, 2026





£42.70 inc. VAT
AI-generated summary
For £35.64 ex‑VAT, this is a pretty decent “get the link back up” SFP option—especially if you’re looking for a straightforward 1GbE copper module for a switch/router that takes standard SFPs. The fact it’s MSA-compliant and designed for 1000BASE‑TX over Cat5e/Cat6 up to 100m makes it a sensible choice for typical office/warehouse patching where you’re not trying to do anything exotic. StarTech tends to be fairly reliable in this space, and for a reseller/IT team it’s the sort of part you keep in stock to avoid downtime.
That said, I wouldn’t treat it as a “one size fits all” replacement without checking compatibility with the exact switch model and SFP requirements. Some vendors are picky—especially around “coded vs uncoded” behavior and link negotiation quirks—so if you’ve ever had issues with third-party transceivers, this is where you’ll want to validate first (or at least test one port). Also, if you’re on a network that’s already borderline on cabling or you care about strict monitoring/features, copper SFPs can be more sensitive to how the switch expects the module to behave. If you need cheap, simple, short‑reach Ethernet and your switch is known to like these modules, it’s good value; if you’re chasing maximum compatibility, pay attention before you buy.

STARTECH
StarTech.com Cisco GLC-EX-SMD Compatible SFP Module, 1000BASE-EX, 1GbE Single Mode (SMF) Fiber SMF Optic Transceiver, 1GbE SFP, LC Connector, 40km, 1310nm, DDM, Firepower, ASR920, IE2000 - Lifetime Warranty (GLCEXSMDST) - SFP (mini-GBIC) transceiver module (equivalent to: Cisco GLC-EX-SMD) - 1GbE - 1000Base-EX - LC single-mode - up to 40 km - 1310 nm

STARTECH
StarTech.com USB 3.0 to Fiber Optic Converter, Compact USB to Open SFP Adapter, USB to Gigabit Network Adapter, USB 3.0 Fiber Adapter Multi Mode(MMF)/Single Mode Fiber (SMF) Compatible - USB Ethernet adapter (US1GA30SFP) - Network adapter - USB 3.0 - 1000Base-LX/1000Base-SX x 1 - black

STARTECH
StarTech.com HPE 455883-B21 Compatible SFP+ Module, 10GBASE-SR, 10GbE Multi Mode (MMF) Fiber Optic Transceiver, LC 300m, 850nm, DDM, HPE 6120XG, 6120G, Flex Fabric, Mini GBIC Transceiver - Lifetime Warranty (455883B21ST) - SFP+ transceiver module (equivalent to: HP 455883-B21) - 10GbE - 10GBase-SR - LC multi-mode - up to 300 m

STARTECH
StarTech.com HPE 455886-B21 Compatible SFP+ Module, 10GBASE-LR, 10GbE Single Mode (SMF) Fiber Optic Transceiver, LC 10km, 1310nm DDM, HPE BladeSystem 562SFP+ 560SFP+, Mini GBIC Transceiver - Lifetime Warranty (455886-B21-ST) - SFP+ transceiver module (equivalent to: HP 455886-B21) - 10GbE - 10GBase-LR - LC single-mode - up to 10 km - 1310 nm - for HPE SimpliVity 380 Gen10 Node, 380 Gen9 Node, Virtual Connect Flex-10