This page is the index of the GRT optical module range. The catalogue divides three ways at once: by form factor and rate (SFP at 1.25G, SFP+ at 10G, SFP28 at 25G, QSFP28 at 100G, and the 400G/800G classes), by fiber discipline (single-mode, multimode, copper presentation), and by direction discipline (duplex pairs, BiDi single-strand, single-direction). Any real link is one point in that three-axis space — find your cage on the first axis and your fiber on the second and the module is chosen.
Treat this page as the map of the range: each family card leads to its own page with the selection detail. If you are starting from a platform rather than a module — a switch or server model — send that list with your inquiry and our team will point you to the families that fit it. Loaner units are available under our free testing service, so a pairing can be proven on your own equipment before a fleet order.
Where do I start if I only know my switch model?
Start there. Tell us the switch and NIC models plus your fiber type, and we will return the exact module list — that is the normal way these are ordered.
Do you sell modules without adapters?
Yes. The module range is a standalone catalogue — order against your platform list so the right variants are quoted.