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How to Optimise Azure VM Performance
6 Jan, 2026





£46.61 inc. VAT
AI-generated summary
At £38.90 ex‑VAT, this is the kind of SFP you buy when you just need link to come up and you don’t want to pay the “official part” premium. For most basic 1GbE copper runs over Cat6/Cat5e up to around 100m, these StarTech-compatible modules are usually good value—especially if you’re maintaining access switches/firewalls/routers where you’ve got multiple identical ports and you’re standardising spares.
Who it suits: teams running Cisco gear (you mentioned Firepower/ASR920/IE2000) who want cost-effective, RJ45-based 1GbE optics for short-to-medium copper links, and who can tolerate that compatibility is model/firmware dependent. Who should avoid it: if you’re buying for a critical environment where you can’t spare time for “does it take this exact module?” testing, or if you expect it to be used across a wide mix of devices/firmware versions—some Cisco platforms are picky and will play games with third-party optics.
In plain terms: buy it if you’re doing routine 100m copper gigabit and you’ve verified compatibility with your exact Cisco model/firmware (or you can test quickly). If this is going into a high-stakes production link and you can’t afford downtime, it may be worth paying more for an OEM part.

STARTECH
StarTech.com Industrial Fiber to Ethernet Media Converter, 100Mbps SFP to RJ45/Cat6, Singlemode/Multimode Optical Fiber to Copper Network, 12-56V DC, IP-30/ -40 to +75C, Fiber to Ethernet - SFP to RJ45 Converter (IMC100MSFP) - Fibre media converter - 100Mb LAN - 100Base-FX, 100Base-TX - RJ-45 / SFP (mini-GBIC)

STARTECH
StarTech.com HPE JL563A Compatible SFP+ Module, 10GBASE-T, SFP to RJ45 Cat6/Cat5e, 10GE Gigabit Ethernet SFP+, RJ-45 (Copper) 30m, HPE 8320, 8325-48Y8, 10Gbps SFP+ Module Transceiver - Lifetime Warranty (JL563A-ST) - SFP+ transceiver module (equivalent to: HP JL563A) - 10GbE - 10GBase-T, 1000Base-T, 100Base-TX, 10Base-T - RJ-45 - up to 30 m - for HPE Aruba 8320, 8325-48Y8C, MACsec Advanced Module, CX 10000 Empty Chassis

STARTECH
StarTech.com Cisco SFP-25G-SR-S Compatible SFP28 Module, 25Gbps Multimode Fiber (MMF), 100m (328ft), LC Connector, 850nm, MSA 25 Gigabit Optical Transceiver - SFP28 transceiver module (equivalent to: Cisco SFP-25G-SR-S) - 25GbE - 25GBase-SR - LC multi-mode - up to 100 m - 850 nm - for Cisco Nexus 93180YC-FX, 93240YC-FX2, 9348GC-FXP, X97160YC-EX

STARTECH
StarTech.com Juniper EX-SFP-10GE-LR Compatible SFP+ Module, 10GBASE-LR, 10GbE Single Mode (SMF) Fiber SMF Optic Transceiver, 10GE Gigabit Ethernet SFP+, LC Connector, 10km, 1310nm, DDM - Lifetime Warranty (EXSFP10GELRS) - SFP+ transceiver module (equivalent to: Juniper EX-SFP-10GE-LR) - 10GbE - 10GBase-LR - LC single-mode - up to 10 km - 1310 nm