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20 Mar, 2026
Shop›Switch Tranceivers (GBIC/SFP)›AddOn Cisco GLC-SX-MMD Compatible SFP Transceiver - SFP (mini-GBIC) transceiver module - 1GbE - 1000Base-SX - LC multi-mode - up to 550 m - 850 nm - for Cisco 38XX, Catalyst 3560, ESS9300, Integrated Services Router 11XX, Nexus 93XX, 93XXX
AddOn Cisco GLC-SX-MMD Compatible SFP Transceiver - SFP (mini-GBIC) transceiver module - 1GbE - 1000Base-SX - LC multi-mode - up to 550 m - 850 nm - for Cisco 38XX, Catalyst 3560, ESS9300, Integrated Services Router 11XX, Nexus 93XX, 93XXX
£17.94
£21.53 inc. VAT
Low Stock(12)MPN: GLC-SX-MMD-AO
🚚 Next-day delivery £4.95
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Key Features
AddOn Cisco GLC-SX-MMD Compatible SFP Transceiver
SFP (mini-GBIC) transceiver module
1GbE
1000Base-SX
LC multi-mode
up to 550 m
850 nm
for Cisco 38XX, Catalyst 3560, ESS9300, Integrated Services Router 11XX, Nexus 93XX, 93XXX
Product Overview
AI-generated summary
For the price (£18.07 ex-VAT), this is exactly the kind of “keep the network running” SFP you buy when you already have a Cisco switch/router that expects a multi-mode 1GbE SX module and you just need the link to come up. If you’ve got existing LC multi-mode fibre runs in the ~550 m ballpark, it’s a cost-effective way to replace a failed transceiver without paying the Cisco-branded premium. In a reseller/ops world, that’s the real value: quick spares, less downtime, and fewer surprises when you’re swapping hardware in the field.
That said, I’d only recommend it if you verify compatibility with your exact Cisco model/OS (some Cisco platforms can be picky about third‑party optics/DOM handling), and you’re confident the fibre type and loss budget match what you’re expecting. If you’re buying this for a long run, single-mode fibre, or environments where optics are “on the edge” (higher temps, older fibre, marginal links), you may end up chasing link flaps or module errors—which wipes out the bargain price fast. For straightforward, known-good multi-mode 1GbE SX links, it’s a sensible buy; for anything uncertain, I’d be more cautious and test one module before rolling out replacements.
Specifications
Product Details
FeatureSFP (mini-GBIC) transceiver module
Feature1GbE
Feature1000Base-SX
FeatureLC multi-mode
Featureup to 550 m
Feature850 nm
Featurefor Cisco 38XX, Catalyst 3560, ESS9300, Integrated Services Router 11XX, Nexus 93XX, 93XXX
Identification
Manufacturer PartGLC-SX-MMD-AO
EAN821455032213
CategorySWITCHTRA
Weight0.04 kg
RRP£51.33
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