- Cyber Security
DNS Security: Protecting Your Business at the Network Level
19 Feb, 2026






£28.54 inc. VAT
AI-generated summary
For £23.82 ex-VAT, this is a very sensible “fill the gap” SFP if you’ve got a switch/router that takes standard 1GbE SFPs and you just need a reliable multimode link. StarTech’s optics are usually decent value in the real world: plug it in, get link, and move on. The inclusion of DDM is a nice practical touch too—if your network team is the kind that wants visibility of temperature/power levels, it helps catch problems before they become outages.
That said, I wouldn’t buy it if you’re expecting it to behave like a guaranteed performance module across every possible vendor revision without checking compatibility. “Compatible” optics can be picky depending on the exact switch model/firmware, especially with link negotiation and optical power thresholds. Also, only makes sense if your infrastructure is multimode fibre with the right reach—if you’re anywhere near using short-reach optics on the wrong fibre type, you’ll waste money and time.
**Who should buy:** UK B2B teams standardising on SFP-based switches for day-to-day multimode deployments who want a low-cost, workable optic with monitoring. **Who shouldn’t:** anyone with ultra-strict compatibility requirements, mixed-vendor edge gear with known optics quirks, or deployments that really need to be designed around different fibre/reach assumptions. If you tell me the exact switch model, I can give you a more confident “yes, buy” vs “double-check first.”

STARTECH
StarTech.com Juniper EX-SFP-1GE-SX Compatible SFP Module, 1000BASE-SX, 1GbE Multimode Fiber MMF Optic Transceiver, 1GE Gigabit Ethernet SFP, LC Connector, 550m, 850nm, DDM, Mini GBIC Module - Lifetime Warranty (EXSFP1GESXST) - SFP (mini-GBIC) transceiver module (equivalent to: Juniper EX-SFP-1GE-SX) - 1GbE - 1000Base-SX - LC multi-mode - up to 550 m - 850 nm

STARTECH
StarTech.com Juniper SFP-1GE-LX Compatible SFP Module, 1000BASE-LX, 1GbE Single Mode (SMF) Fiber SMF Optic Transceiver, 1GE Gigabit Ethernet SFP, LC Connector, 10km, 1310nm, DDM, Mini GBIC - Lifetime Warranty (SFP1GELXST) - SFP (mini-GBIC) transceiver module (equivalent to: Juniper EX-SFP-1GE-LX) - 1GbE - 1000Base-LX - LC single-mode - up to 10 km - 1310 nm

STARTECH
StarTech.com HPE J9151A Compatible SFP+ Module, 10GBASE-BX, 10 Gigabit Ethernet Bi-Directional (BiDi) Fiber Single Strand SFP+, LC 10km, HPE 2920, 2910al, 3500yl, Mini GBIC Transceiver SFP+ - Lifetime Warranty (J9151A-BX-D-ST) - SFP+ transceiver module (equivalent to: HP J9151A-BX-D) - 10GbE - 10GBase-BX - LC single-mode - up to 10 km - 1270 nm / 1330 nm

STARTECH
StarTech.com Cisco GLC-LH-SM Compatible SFP Module, 1000BASE-LX/LH, 1GE Gigabit Ethernet SFP, LC Connector, 10km, 1310nm, Cisco IE3400, IE3300, IE3200, Mini GBIC Transceiver SFP Module - Lifetime Warranty (SFPGLCLHSMST) - SFP (mini-GBIC) transceiver module - 1GbE - 1000Base-LH - LC single-mode - up to 10 km - 1310 nm - for P/N: ET91000SFP2, ET91000SFP2C, IES101002SFP, MCM1110SFP, PEX1000SFP2