As we know, a SFP module just looks the same as the SFP+ module. And most switches can both support SFP module and SFP+ module. So, do these two modules really refer to the same one? What’s the difference between them?
SFP stands for Small Form-factor Pluggable. It is a hot-pluggable transceiver that plugs into the SFP port of a network switch and supports SONET, Gigabit Ethernet, Fibre Channel, and other communications standards. SFP specifications are based on IEEE802.3 and SFF-8472. They are capable of supporting speeds up to 4.25 Gbps. Due to its smaller size, SFP replaces the formerly common gigabit interface converter (GBIC). Therefore SFP is also called Mini-GBIC. By choosing different SFP module, the same electrical port on the switch can connect to different fiber types (multimode or single-mode) and different wavelengths.
Since SFP supports only up to 4.25 Gbps, SFP+ that supports data rates up to 16 Gbps was later introduced. In fact, SFP+ is an enhanced version of the SFP. The SFP+ specifications are based on SFF-8431. In today’s most applications, SFP+ module usually supports 8 Gbit/s Fibre Channel, 10 Gigabit Ethernet and Optical Transport Network standard OTU2. In comparison to earlier 10 Gigabit Ethernet XENPAK or XFP modules, SFP+ module is smaller and becomes the most popular 10 Gigabit Ethernet module in the market.
SFP vs SFP+
Review the SFP and SFP+ definition mentioned above, we can know that the main difference between SFP and SFP+ is the data rate. And due to different data rate, the applications and transmission distance is also different.
|SFP (1Gbps)||SFP+ (10Gbps)|
|1000BASE-SX SFP 850nm 550m
1000BASE-LX/LH SFP 1310nm 20km
1000BASE-EX SFP 1310nm 40km
1000BASE-ZX SFP 1550nm 80km
|10GBASE-SR SFP+ 850nm 300m
10GBASE-LRM SFP+ 1310nm 220m
10GBASE-LR SFP+ 1310nm 10km
10GBASE-ER SFP+ 1550nm 40km
10GBASE-ZR SFP+ 1550nm 100km
Fiber Channel Application
|SFP (2G, 4G)||SFP+ (8G)|
2G Fibre Channel SFP 1310nm 2km/15km/20km/40km
2G Fibre Channel SFP 1510nm 80km
4G Fibre Channel SFP 850nm 150m
4G Fibre Channel SFP 1310nm 5km/10km/15km/20km
8G Fibre Channel SFP+ 850nm 150m
8G Fibre Channel SFP+ 1310mn 10km/20km/40km
8G Fibre Channel SFP+ 1510nm 80km
|SFP (155Mbps, 622Mbps, 2.5Gbps)||SFP+ (10G)|
OC-3/STM-1 1310nm 2km/15km/40km
OC-3/STM-1 1510nm 80km
OC-12/STM-4 1310nm 500m/2km/15km/40km
OC-12/STM-4 1510nm 80km
OC-48/STM-16 1310nm 2km/15km/40km
OC-48/STM-16 1510nm 80km
|OC-192/STM-64 850nm 300m
OC-192/STM-64 1310nm 2km/10km/20km/40km
OC-192/STM-64 1510nm 80km
Usually, SFP module plugs into SFP port of the switch and SFP+ module plugs into SFP+ port of the switch. But, sometimes SFP module can also be plugged into SFP+ port. Which SFP or SFP+ module should you choose all depends on your switch types. Fiberstore is a reliable SFP transceiver module manufactures, all SFP module and SFP+ module types are available in FS.COM. Besides, SFP+ cable is also provided. What’s more, the price of SFP module and SFP+ module is lower than many other manufactures. SFP test is strict in FS.COM. Matching fiber patch cable is also available.
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