There are many standards and specifications for 10 Gigabit Ethernet, which can generally be divided into three categories: one is the 10 Gigabit Ethernet specification for optical fiber-based LAN, the other is the 10 Gigabit Ethernet specification for LAN based on twisted pair (or copper wire), and the third is the 10 Gigabit Ethernet specification for optical fiber-based WAN. This article will focus on the standard of fiber optic 10 Gigabit Ethernet.
1. 10GBASE-SR
10GBASE-SR"sr"Representatives"Short distances"(short range), the specification supports shortwave (wavelength 850nm) multimode fiber (mmf) with encoding mode 64b 66b, with an effective transmission distance of 2 300m, and to support 300m transmission, it is necessary to use an optimized 50 m wire diameter OM3 (optimized multimode 3) fiber (a fiber without an optimized wire diameter of 50 m is called OM2 fiber, and the wire diameter is 62.)A fiber of 5 m is called OM1 fiber).
10GBASE-SR offers the lowest cost, lowest power consumption, and smallest fiber modules.
2. 10GBASE-LR
10GBASE-LR"lr"Representatives"Long distances"(Long Range), the specification supports long-wave (1310nm) single-mode fiber (SMF) encoded in 64B and 66B, with an effective transmission distance of 2m to 10km, and in fact up to 25km.
The 10GBASE-LR fiber module is less expensive than the 10GBASE-LX4 fiber module that will be introduced below.
3. 10GBASE-LRM
10GBASE-LRM"lrm"Representatives"Length extension multipoint mode"(Long Reach Multimode), which corresponds to IEEE 802 published in 20063aq。FDDI 62With an effective transmission distance of 220m in FDDI networks and 100BASE-FX networks of 5 m multimode fiber, and up to 260m in OM3 fiber, it is not as good as the previous 10GBASE-LX4 specification in terms of connection length, but its fiber module has a lower cost and lower power consumption than the 10GBASE-LX4 specification fiber module.
Fourth, 10GBASE-ER
10GBASE-ER"er"Representatives"Ultra-long distances"(extended range), the specification supports ultra-long-wave (1550nm) single-mode fiber (SMF) with effective transmission distances from 2m to 40km.
5. 10GBASE-ZR
Several manufacturers have proposed module interfaces with transmission distances of up to 80km, which is the 10GBASE-ZR specification. It also uses ultra-long-wave (1550nm) single-mode fiber (SMF). But the physical layer of 80km is not in EEE 802Within the 3AE standard, which is described by the vendor itself in the OC-192 STM-64 SDH SONET specification, will not be used by IEEE 8023. Accepted by the working group.
6. 10GBASE-LX4
10GBASE-LX4 uses wavelength division multiplexing technology to unify the wavelength of 4 channels to 1300 nm and operates at 3125 GB s of separate light sources for 10 GB of transmission. The specification has an effective transmission distance of 2 300 m in multimode fiber and up to 10 km in single-mode fiber. It is primarily suitable for environments that require support for both multimode and singlemode fibers in a single fiber module. Because the 10GBASE-LX4 specification uses four laser light sources, it has shortcomings compared to the 10GBASE-LRM specification introduced earlier in terms of cost, fiber diameter, and power supply cost.