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3 Sep, 2025




£66.40 inc. VAT
AI-generated summary
For £55.42 ex‑VAT, this is the kind of SFP+ optic that makes sense when you need a straightforward, low-drama replacement and you’re working in a Juniper-aligned environment. The key practical benefit is that it’s “plug and play” for common 10GbE single‑mode links, so you don’t burn time chasing weird compatibility quirks. If your switch already uses the same optics family and you’re just swapping like-for-like (or adding a spare for field jobs), it’s good value and generally painless—especially since the DDM/monitoring bit helps you spot failing optics before they cause downtime.
That said, I wouldn’t buy this if you’re running a mixed optics setup across different vendors or models, or if you’re trying to use it outside the intended wavelength/link-length profile. In the real world, SFP+ optics can be picky about firmware/EEPROM interpretation, and non-genuine “compatible” modules sometimes get you warnings or erratic link behavior—rare, but enough for me to be cautious. Bottom line: buy it if you’re replacing an existing Juniper-compatible 10GBASE‑LR SFP+ for a normal 10 km single‑mode LC run and want the cheapest reliable route; skip it if you need absolute cross-platform certainty or you don’t have a known-good baseline in your hardware.

TP-Link
TP-Link TL-SM321B V3.2 - SFP (mini-GBIC) transceiver module - 1GbE - 1000Base-BX - LC/UPC single-mode - up to 20 km - 1310 (TX) / 1550 (RX) nm

STARTECH
StarTech.com Juniper CTP-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 - Lifetime Warranty (CTPSFP1GESXS) - SFP (mini-GBIC) transceiver module (equivalent to: Juniper CTP-SFP-1GE-SX) - 1GbE - 1000Base-SX - LC multi-mode - up to 550 m - 850 nm

TP-Link
TP-Link TL-SM321A V3 - SFP (mini-GBIC) transceiver module - 1GbE - 1000Base-BX - LC/UPC single-mode - up to 20 km - 1310 (RX) / 1550 (TX) nm

STARTECH
StarTech.com USB to Fiber Optic Converter, 100Mbps, USB 2.0 to Fiber Network Adapter, 100BASE-FX SC Female Duplex Multimode Fiber/MMF Compatible, 2Km, Compact USB to Fiber LAN Adapter - USB to LAN Adapter (US100A20FXSC) - Network adapter - USB 2.0 - 100Base-FX/100Base-SC x 1 - 1310 nm - black