Grandstream F-SM1310-20KM-1.25G Single Mode SFP Fiber Module

Grandstream F-SM1310-20KM-1.25G Single Mode SFP Fiber Module — Dependable Long-Distance Fiber Connectivity at Gigabit Speed

When your network needs to bridge distances that multi-mode fiber simply can’t handle — across buildings, between floors of a large campus, or along a city-block ISP backbone — single mode fiber is the answer. And for IT professionals and network engineers in Bangladesh who need a reliable, budget-conscious solution, the Grandstream F-SM1310-20KM-1.25G Single Mode SFP Fiber Module delivers exactly that: clean 1.25 Gbps transmission over up to 20 kilometers of single mode fiber.

This is the kind of module that quietly does its job without demanding attention. Plug it into any SFP-compatible switch, connect your single mode LC fiber patch cord, and you’ve got a stable, long-reach fiber link running at full Gigabit speed. No fuss, no proprietary headaches — just solid, standards-compliant performance that network admins can depend on.

The F-SM1310-20KM-1.25G operates at the widely-used 1310nm wavelength, which is the industry standard for single mode Gigabit links. That means it integrates effortlessly into existing fiber plants, pairs naturally with compatible SFP modules from other vendors, and fits neatly into both new deployments and legacy infrastructure upgrades. For ISPs, enterprise IT teams, and campus network managers across Dhaka, Chattogram, and beyond, this is a practical workhorse that punches well above its price point.

Whether you’re linking a head office to a remote branch, extending a fiber uplink between buildings in an industrial park, or building out the distribution layer of a metropolitan network, the 20km reach gives you real flexibility without forcing you into expensive DWDM or long-haul solutions. It’s the sweet spot for mid-range fiber connectivity — and Grandstream has nailed it.

Grandstream F-SM1310-20KM-1.25G Specifications

Why You Buy Grandstream F-SM1310-20KM-1.25G

• Bridge Long Distances Without Breaking Your Budget — Multi-mode fiber tops out at a few hundred meters, making it useless for inter-building or cross-campus links. The F-SM1310-20KM-1.25G solves that problem directly — 20km of single mode reach means you can connect remote offices, warehouses, or building blocks on a single Gigabit fiber link, without investing in expensive long-haul equipment or leased lines.
• Drop-In Compatibility with Your Existing SFP Infrastructure — Replacing or expanding fiber uplinks shouldn’t mean replacing your switches. This module slots into any standard SFP port and works reliably across major brands including MikroTik, Cisco, Ubiquiti, TP-Link, and Huawei — making it an ideal choice for mixed-vendor environments that are common in Bangladeshi enterprise and ISP networks.
• Built-In DDM for Smarter, Proactive Network Management — Unlike basic modules that give you no visibility into link health, the F-SM1310-20KM-1.25G supports Digital Diagnostic Monitoring (DDM/DOM). This means your network management system can track real-time metrics like optical power levels, temperature, and voltage — catching potential issues before they become outages, which is critical for high-availability deployments.

FAQ

Q1: Can the Grandstream F-SM1310-20KM-1.25G work with switches from other brands like MikroTik or Cisco? Yes — the F-SM1310-20KM-1.25G is built to industry-standard 1000BASE-LX specifications, which means it is broadly compatible with SFP slots on switches and routers from most major vendors including MikroTik, Cisco, Ubiquiti, TP-Link, and Huawei. In rare cases where a switch enforces vendor lock-in, you may need to disable that restriction through the device’s firmware or CLI settings before the module is recognized.

Q2: What fiber cable and connector type does this SFP module require? This module requires single mode fiber (SMF) with an LC Duplex connector at both ends. Standard OS1 or OS2 single mode patch cables work perfectly. For link distances up to 20km, ensure your fiber run is clean, properly spliced, and within acceptable loss budget — connector contamination is one of the most common causes of performance issues on long single mode links.

Q3: What is the price of the Grandstream F-SM1310-20KM-1.25G in Bangladesh? The Grandstream F-SM1310-20KM-1.25G is available at competitive prices through authorized networking hardware distributors and online stores in Bangladesh, with pricing varying by retailer and order quantity.

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