{"id":19965,"date":"2026-08-04T08:15:30","date_gmt":"2026-08-04T08:15:30","guid":{"rendered":"https:\/\/www.fibermall.com\/blog\/?p=19965"},"modified":"2026-09-08T08:57:55","modified_gmt":"2026-09-08T08:57:55","slug":"sfp28-module-types-choose-the-right-25g-link","status":"publish","type":"post","link":"https:\/\/www.fibermall.com\/blog\/sfp28-module-types.htm","title":{"rendered":"SFP28 Module Types: Choose the Right 25G Link"},"content":{"rendered":"\n

Two 25G products can slide into the same SFP28 port and solve completely different problems. One may be a 1 m passive copper cable for a server in the same rack. The other may be a 40 km single-mode optic for a remote site. The cage is the same. The network design is not.<\/p>\n\n\n\n

That is why SFP28 module types<\/strong> can be confusing during a refresh. A name such as SR, LR, BiDi, or DWDM tells you about the medium, wavelength, fiber count, reach, and often the deployment cost. It does not just describe a label on a pull tab. This guide maps the common 25G choices to the fiber and distance you already have, then flags the compatibility checks that keep a purchase order from becoming a link-down ticket.<\/p>\n\n\n\n

In March, Elena\u2019s operations team planned a 25G upgrade between two rows of leaf switches. Their drawings showed 62 m of OM3 fiber, which seemed safe for a short-reach design. But the route included four patch panels and a 9 m service loop.<\/p>\n\n\n\n

That put the full channel close to the 70 m OM3 limit. The team kept the 25GBASE-SR design, measured the route before ordering, and avoided the wrong reach class. Small details decide these jobs.<\/p>\n\n\n\n

\"25G<\/figure>\n\n\n\n
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