- IT Support
What to Include in Your IT Support Contract
22 Dec, 2025




£35.28 inc. VAT
AI-generated summary
If you’re trying to get a TP-Link GPON setup working with Class C+ tolerances, this kind of SFP module is usually a “make the system whole” purchase rather than something you’d buy for performance. At £29.38 ex-VAT, it’s priced like a practical spares/upgrade part for someone already running compatible TP-Link fibre gear. In that context it makes sense: you want reliability, the right optics class, and you don’t want to pay for a premium module when you’re not chasing extra reach or features.
That said, don’t buy this on the assumption that “any GPON SFP will do.” GPON modules are picky about vendor/compatibility and the specific class/spec your OLT/ONT expects. If you’re unsure what your existing equipment is using, you could end up with something that physically fits but won’t negotiate properly. So: buy it if you’re matching TP-Link GPON Class C+ requirements for an existing TP-Link deployment; skip it if you’re mixing brands, experimenting, or you don’t have confirmation of the required optics class from your network documentation.

Lenovo
Brocade - SFP+ transceiver module - 10GbE - 10GBase-SR - for System x3100 M5, x3250 M4, x3250 M6, x3300 M4, x3650 M3, x3950 X5, ThinkSystem SR250

STARTECH
StarTech.com Cisco GLC-ZX-SM-RGD Compatible SFP Module, 1000BASE-ZX, 1GbE SMF Optic Transceiver, LC Connector, 70km, 1550nm, DDM, Cisco ASR920, IE2000IE4000, Mini GBIC Transceiver Module - Lifetime Warranty (GLCZXSMRGDST) - SFP (mini-GBIC) transceiver module (equivalent to: Cisco GLC-ZX-SM-RGD) - 1GbE - 1000Base-ZX - LC single-mode - up to 70 km - 1550 nm

TP-Link
TP-Link TL-SM311LS - SFP (mini-GBIC) transceiver module - fibre optic - LC single-mode - up to 10 km - 1310 nm - for P/N: TL-SG3452XP V1

Qnap
QNAP - SFP+ transceiver module - 10GbE - 10GBase-SR - up to 300 m - 850 nm