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The 25G Ethernet solution is a solution standardized and developed by IEEE 802.3 task force P802.3by. This solution is mainly concentrated for use in datacenter environment. The 25G Ethernet consortium has been formed in July 2014 to support the deployment of single lane 25GB/s solutions and dual-lane 50GB/s Ethernet solutions. The 25GB Ethernet consortium has been finished since September 2015. In November 2015 the 802.3 task force has been formed to develop the single-lane 25 GB/s Ethernet solution and on June 30 the IEEE 802.3by standard has been approved by the IEEE-SA Standards board.
The IEEE 802.3by standard defines the technologies below:
- A single lane 25 GB/s 25GBASE-KR PHY for printed circuit backplanes. PHY is a type of chip which is an abbreviation for the physical layer of the OSI model
- A single-lane 25 GB/s 25GBASE-CR-S PHY for 3 meters twin-ax cables (in-rack)
- A single-lane 25 GB/s 25GBASE-CR-L PHY for 5 meters twin-ax cables (inter rack)
- A single-lane 25 GB/s 25GBASE-SR PHY for 100 m OM4 or 70 m OM3 Multimode optical fiber
The 25GB Ethernet equipment has been available on the market for purchase since June 2016 and it uses the SFP28 and QSFP28 Optical transceivers. Also, direct attach SFP28 to SFP28 cables are available with fixed lengths of 1, 2, 3 and 5 meters. These are manufactured by various manufacturers. Also, lately have been announced the optical transceivers which will support 1310nm “LR” optics which will be able to reach from 2 kilometers up to 10 kilometers over a two strands of Single-mode fibers.
There are several factors to successfully create a fully functioning 25GB Ethernet Network. Optical transceivers and Direct Attach Cables that would support the 25GB and 50GB Ethernet are a must and at the end of the connection the NIC cards which have to support these solutions will guarantee the maximum performance. The deployment of 25GB Ethernet solution in Datacenters will definitely boost the whole core network, storage network and cloud computing network, thus providing the customers with greater bandwidth and stability utilizing the 10GB Ethernet solutions.
The SFP28 optical transceiver, which is a transceiver based on the widely popular SFP+ Form-Factor, introduces a new generation of high-density 25 GB/s Ethernet applications for Datacenters and Enterprise companies. It provides a conventional and cost-effective upgrade.
BlueOptics© offers two models of SFP28 with Duplex connector:
- BO27Q13610D 25GBASE-LR, SFP28 Optical transceiver
- BO27Q856S1D 25GBASE-SR, SFP28 Optical transceiver
The BlueOptics© BO27Q13610D 25GBASE-LR, SFP28 is a superior performance optical transceiver capable for long range distances up to 10 kilometers on Single-mode fibers and speeds up to 25.78 Gigabits per second. It features the Digital Diagnostic Monitoring feature and it can be used in 1310 optical window. This transceiver fulfills the 802.3by standard and even exceeds the Multiple Source Agreements (MSA). It features the Digital Diagnostic Monitoring feature for real-time parameter monitoring and the option for alarms if the high level threshold is exceeded.
The BlueOptics© BO27Q856S1D 25GBASE-SR, SFP28 is a short range optical transceiver capable for reaching distances up to 100 meters over Multi-mode fibers. Unlike the previous model, this transceiver can be used in the 850 nm optical window, however it provides the same speed like the LR (long range) model with up to 25.78 Gigabits per second. The Digital Diagnostic Monitoring feature comes standard and it has up to 3.000.000 MTBF working hours.
Both models come with 5 year warranty and a lifetime support.
