Tag Archives: 10GBASE-LRM

Four Families OF 10 Gigabit Ethernet

The IEEE 10 Gb/s standard was first specified in the 802.3ae supplement, which was adopted in 2002. This supplement defined the basic 10 Gigabit system and a set of fiber optic media standards. Subsequent 10 Gb/s supplements have added copper media types, including a short-range copper connection based on twinaxial cable and a twisted-pair media system capable of reaching 300 m.

There are four sets of physical layer(PHY) specification, also called”families”in the standard. which are grouped by their use of the same signal encoding techniques and other elements.

Based on 64B/66B signal encoding, this includes the following optical fiber media
systems: 10GBASE-SR, 10GBASE-LR, 10GBASE-ER, and 10GBASE-LRM.

Based on 8B/10B signal encoding, including both fiber optic (10GBASE-LX4) and
copper (10GBASE-CX4) media systems.

Based on 64B/65B encoding, supporting transmission over twisted-pair cabling.

Based on 64B/66B encoding that is encapsulated and transmitted over an OC-192
SONET optical fiber system. This includes the 10GBASE-SW, 10GBASE-LW, and
10GBASE-EW media specifications.

10 Gigabit Ethernet LAN PHYs include five media systems:


Each of the LAN PHYs was specified to provide a media system for a specific set of uses. The short-reach systems are intended for connections between switches in a building or a data center, and from switch ports to server interfaces. The long-reach systems, intended for backbone links on campus and enterprise networks, use more expensive. Single-mode laser-based optics to drive 10 Gigabit signals over longer distances, with
ranges from 10 km for the LR system up to 30–40 km for the ER.

The most used fiber Media Components in 10 Gigabit Ethernet:

Multimode fiber optic cable for short-reach applications.
Single-mode fiber optic cables for long-reach applications.
Mode conditioning patch cable for FDDI grade multimode fiber and OM1 or OM2 cables, up to 220m.
Transceiver: The most popular current form is the SFP+ Module.

Fiber-optic-tutorial.com will offer more information about Gigabit Ethernet. You can also buy fiber media components from Fiberstroe.