What does 10GBASE-SR mean?
10 Gigabit Ethernet (10GE, 10GbE, or 10 GigE) is a group of computer networking technologies for transmitting Ethernet frames at a rate of 10 gigabits per second (10×109 or 10 billion bits per second) and 10GBASE-SR transceivers are part of this group. It was first defined by the IEEE 802.3ae-2002 standard. Unlike previous Ethernet standards, 10 Gigabit Ethernet defines only full duplex point-to-point links which are generally connected by network switches; shared-medium CSMA/CD operation has not been carried over from the previous generations Ethernet standards. Half duplex operation and repeater hubs do not exist in 10GbE.
10GBASE-SR transceivers ("short range") is a port type for multi-mode fiber and uses 850 nm lasers. Its Physical Coding Sublayer 64b/66b PCS is defined in IEEE 802.3 Clause 49 and its Physical Medium Dependent PMD in Clause 52. It delivers serialized data at a line rate of 10.3125 Gbit/s.
The range depends on the type of multi-mode used:
MMF has the advantage over SMF of having lower cost connectors because of its wider core.
The 10GBASE-SR transceivers is implemented with a VCSEL which is low cost and low power. OM3 and OM4 optical cabling is sometimes described as laser optimized because they have been designed to work with VCSELs. 10GBASE-SR transceivers delivers the lowest cost, lowest power and smallest form factor optical modules.For 2011, 10GBASE-SR transceiver is projected to make up a quarter of the total 10GbE adapter ports shipped.
There is a non-standard lower cost, lower power variant sometimes referred to as 10GBASE-SRL (10GBASE-SR lite). This is inter-operable with 10GBASE-SR transceivers but only has a reach of 100 meters.
What is 10GBASE-SR SFP + module?
10GBASE-SR SFP+ Fiber Transceiver Module 850nm MM LC w/DDM - 300m (984ft) is built to comply with MSA (Multi-Sourcing Agreement) standards to offer a cost-effective way to add, replace or upgrade a 10Gb SFP+ Multimode LC port on your fiber networking equipment or fiber media converter.Supporting data rates up to 11.1 Gbps as well as Digital Diagnostics Monitoring (DDM), this LC SFP+/Mini-GBIC module can be installed into any fiber networking device with an MSA or Cisco compliant 10GbE SFP+ port. Delivering both convenience and scalability, this fiber transceiver is fully hot-pluggable, which enables you to install the module without interrupting network traffic or requiring a device reboot.
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