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Understand 10G SFP+ Transceiver From the Perspective of Connecting Cable Types

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SFP+ transceiver is very popular in many data center and enterprise servers network application. As we all known, 10G SFP+ transceivers have a big branch family. Different SFP+ transceivers can provide a wide variety of connectivity options. There are several approaches for us to understand 10G SFP+ transceivers family. For example, with the compliance to different 10G Ethernet standard, we can classify transceivers as 10GBase-SR, 10GBase-LR, 10GBase-ER, 10GBase-ZR etc. Or viewing from the port type, we can see the difference between the SFP+ transceiver configured with duplex LC connector or a RJ-45 connector. But there is another approach we can understand and distinguish SFP+ transceivers. And That is waht I am going to talk about: the Connecting Cable Types.

A variety of 10G SFP+ transceivers

1.Copper Cable

10GBase-T SFP+ is a transceiver configured with a RJ-45 port, which means that it uses copper cable to provide connections of 10G transmission speed. Cat 6, cat 6a or cat 7 copper cable is required in this situation. As for the transmission distance, it only supports a link length of up to 30 meters. 10GBase-T SFP+ transceiver is a suitable one for very short distances and offer a cost-effective way to connect within racks and across adjacent racks.

Table 1

Transceiver Style Distance Cable Wavelength
10GBase-T 30M Cat6, Cat6a,Cat7 Copper Cable N/A

2.Multi-mode fiber

10GBase-SR SFP+ is the transceiver using multi-mode fiber to transfer data in SFP+ family. It is using 850nm wavelength. 10GBaase-SR transceiver supports a link length of 26m on standard Fiber Distributed Data Interface (FDDI)-grade multi-mode fiber. Using OM3 multi-mode fiber, up to 300m link lengths are possible. Using OM4 multi-mode, up to 400m link lengths are possible.

Table 2

Transceiver Style Distance Cable Wavelength
10GBase-SR Up to 400M Multi-mode 850nm

3.Both single-mode fiber & multi-mode fiber available

10GBase-LX4 and 10GBase-LRM transceiver is using both single-mode fiber and multi-mode fiber to transfer data. 10GBase-LX4 transceiver uses CWDM technology to divide 12.5 GB/s data streams into four 3.125 GB/s data streams that are propagated in optical fibers. And due to the 8B/10B encoding, the effective data flow is 10 GB/s. But 10GBase-LX4 transceiver has the disadvantages of high cost and much power consumption. Therefore,it has a very narrow market. 10GBase-LRM transceiver is a replacement of 10GBASE-LX4 transceiver, allowing distances up to 220 meters. It supports link lengths of 220m on standard Fiber Distributed Data Interface (FDDI) grade Multi-mode Fiber. There’s one thing to notice. To make sure that specifications are met over FDDI-grade, OM1 and OM2 fibers, the transceiver should be coupled through a mode conditioning patch cord. No mode conditioning patch cord is required for applications over OM3 or OM4. Besides, using standard single-mode fiber, 10GBase-LRM module also can support a link length of 300m. In general, multi-mode fiber connecting is the most application scenario for 10GBase-LRM transceiver.

Table 3

Transceiver Style Distance Cable Wavelength
10GBase-LRM 220M(MMF)


Single-mode or multi-mode 1310nm
10GBase-LX4 obsoleted 300M(MMF)


Single-mode or multi-mode CWDM

4.Single-mode fiber

There are three basic kinds of transceivers using single-mode fibers to transfer data in SFP+ family: 10GBase-LR, 10GBase-ER, 10GBase-ZR. With carrying different wavelength, every transceiver can reach up different distances. For example, 10GBase-LR transceiver can support a link length of up to 10 kilometers. 10GBase-ER transceiver can support a link length of up to 40 kilometers. 10GBase-ZR transceiver can support a link length of up to 80 kilometers. Due to a superior transmission range and usually a long length of optic fiber cable, using these three transceivers means much higher cost. So these three kinds of transceivers are the better option where budget is not a constraint, or when the demand for long cable system.

Table 4

Transceiver Style Distance Cable Wavelength
10GBase-LR 10KM Single-mode 1310nm
10GBase-ER 40KM Single-mode 1550nm
10GBase-ZR 80KM Single-mode 1550nm


From the perspective of connecting cable types, we will have a more clear image of 10G SFP+ transceiver. In fact, we can easily draw the conclusion: different cable types constrain the transmission distance of the 10G SFP+ transceiver. The range of transmission distance is an important consideration factor of selecting SFP+ transceivers. Below is a detailed table for 10G SFP+ transceivers offered by 10Gtek, which gives you more reference information.

Order Information:

P/N Description Reach Fiber Type Wavelength TX Power(dBm) RX Sens(dBm) DDM
ASF-10G-T 10Gbase-T 30 m Cat6a/7 Y
AXS85-192-M3 SFP+ SR 300 m MMF 850nm -6~-1 <-11.1 Y
AXS13-192-M2 SFP+ LRM 220 m MMF 1310nm -6.5~-0.5 <-10 Y
AXS13-192-10 SFP+ LR 10 km SMF 1310nm -8.2~0.5 <-14.4 Y
AXS15-192-40 SFP+ ER 40 km SMF 1550nm -4.7~4 <-15.8 Y
AXS15-192-80 SFP+ ZR 80 km SMF 1550nm 0~5 <-23 Y
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