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FAQ on Fiberstore 40G Cabling and Transceivers

With an Increasing demand for more bandwidths, faster data rates and higher performance in telecommunication networks, the business case for 40 Gigabit Ethernet is Becoming inescapably compelling. However, manyusers May feel confused When using 40G cables and optical transceivers. This article will solve the most frequently asked questions on Fiber store's 40G cabling and transceivers.

Q1: What 40G cables and transceivers are available from Fiber Store?

Fiber Store supplies a full range of Both copper cables and optical transceivers for 40GbE, compliant to the IEEE standards. Copper bothering to QSFP + QSFP + (40G to 40G) and QSFP + to SFP + (40G to 4x10G) cables enable Short Reach options. For longer distances, fiber Store offers a wide range of optical transceivers for various fiber types and Reach Requirements.

Q2: What does the IEEE 40GBASE-X standard describe?

The IEEE 40GBASE-X standard describes The Following:

  • 40GBASE-SR4 It Reaches 40-Gbps Ethernet over four short-range multi-mode fiber optic cables and supports link lengths of 100m and 150m respectively on the laser-optimized OM3 and OM4 multimode fiber cables. In this process, the multimode fiber uses parallel-optics transmission instead of serial transmission due to the 850nm vertical-cavity surface-emitting laser (VCSEL) modulation limits. For example, Mellanox MC2210411-SR4 compatible 40GBASE-SR4 QSFP + transceiver from Fiber Store supports link length of 100m over multimode fiber cable.
  • 40GBASE-LR4 It Reaches 40-Gbps Ethernet over four wavelengths Carried by a single long-distance single-mode fiber optic cable and supports link lengths of up to 10 km over single-mode fiber with duplex LC connectors. It hydrothermal at a wavelength of 1310 nm. The 40 Gigabit Ethernet signal is the carried over four wavelengths with 10G on each wave.
  • 40GBASE-CR4 It is a direct attach cable segments with the QSFP + modules attached to each end of the cable. It Reaches 40-Gbps Ethernet over four short-range twinaxial copper cables bundled as a single cable and supports link lengths of up to 10 km over a standard pair of G.652 single-mode fiber with duplex LC connectors.

Q3: Can the 40G-LR4 transceiver be split into 4x10G connections?

No, 40G-LR4 can not be split into 4x10G. The 40GBASE-LR4 uses 4 lambdas (or wavelengths) on a pair of single mode fiber, and does not lend itself to "splitting" into four pairs without Substantial complexity to split out the wavelengths. The unique characteristic of 40GBASE-SR4 Is that it uses parallelism (ribbon) fiber, Which allows the creation of four fiber pairs. As an alternative single-mode parallel 40G optics are available (40G and 40G-PLRL4-pLR4) That do allow for splitting into 4x10G (single mode).

Q4: How does the QSFP + to SFP + fiber convertor allow 4x 10G?

The IEEE 40G-SR4 standard Unspecified a parallel technology, with 4 lanes in each direction. The purpose of this was to allow for Easier Development of 40G, 10G re-using components. As a side result the 40G multi-mode transceivers can's support 4x10G modes. A fiber That connects from one 40G port to four 10G ports Provides a physical path to allow the source "40G" port running in 4x10G fashion to be connected to four 10G unique destination. As the fiber is a passive medium, it has no concept of the 40G or 10G signal.

Fiber Store Provides various types of 40G cables and transceivers including single-mode and multi-mode with different channels and wavelengths. All These transceivers are compatible with famous brands, like Brocade QSFP + , QSFP + HP, Juniper QSFP +, etc. They Can Also be customized to meet your special Requirements.

Publicerat klockan 11:20, den 15 februari 2016
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Guide to 40 Gigabit Ethernet Options

Data centers regularly undertake their own great migration from 10G to 40G , 100G and even higher speed networks. 40 Gigabit Ethernet is a standard that enables the transfer of Ethernet frames at speeds of up to 40 gigabits per second (Gbps), allowing 40 Gigabit Ethernet-enabled equipment to handle traffic at the aggregation and core layers. A right and cost-effective solution for 40 Gigabit Ethernet is very necessary in data center communications. The 40GbE transceiver options and cabling options will be introduced in this article.

40GbE Transceiver Options

As with any new generation of technology, one design goal was to leverage as much existing technology as possible. By minimizing the number of new interfaces, the interfaces become less expensive and take advantage of volume production and simplicity. To meet this design goal, there are three media modules will be used in the first generation of 40 Gigabit Ethernet: QSFP, CXP and CFP.

QSFP The Quad Small-Form-Factor Pluggable (QSFP) is similar in size to the CXP and provides four transmit and four receive lanes to support 40 Gigabit Ethernet applications for multimode fiber and copper today and may serve single-mode in the future. Another future role for the QSFP may be to serve 100 Gigabit Ethernet when lane rates increase to 25 Gbps.

CXP The CXP transceiver features 12 transmit and 12 receive 10-Gbps lanes to support one 100 Gigabit Ethernet port, or up to three 40 Gigabit Ethernet ports. It can achieve rates up to 120 Gbps of pluggable data over 12 lanes in one assembly while enhanced-footprint connectors transmit signals over 10 lanes for up to 100 Gbps.

CFP The C Form-Factor Pluggable (CFP) is a new media module that was designed for longer-reach applications, with up to 24 watts of power dissipation. Its dense electrical connectors and integrated, riding heat sink enable a range of interfaces. This module is used for 40GBASE-SR4, 40GBASE-LR4.

40GbE Cabling Options

Cables used in 40 Gigabit Ethernet mainly include passive and active direct attach copper cables and active optical cable (AOC). The QSFP+ passive or active direct attach copper cables are designed with twinax copper cable and terminated with QSFP+ connectors. For instance, Cisco QSFP-H40G-CU1M compatible QSFP+ to QSFP+ passive copper cable is suitable for very short distances and offer a very cost-effective way to establish a 40-gigabit link between QSFP port and SFP+ port of Cisco switches within racks and across adjacent racks. The main difference between passive QSFP+ DAC and active QSFP+ DAC is that the passive one is without the active component. AOC is used for short-range multi-lane data communication and interconnect applications. It uses electrical-to-optical conversion on the cable ends to improve speed and distance performance of the cable without sacrificing compatibility with standard electrical interfaces.

QSFP-H40G-CU1M

Fiberstore offers a comprehensive solution for 40 Gigabit Ethernet. We have a wide range of 40G optical transceivers which are 100% compatible with many famous brands, like Mellanox QSFP+ (MC2210411-SR4), Finisar QSFP+ (FTL410QE2C), etc. Besides, we also provide high-quality and cost-effective cables such as QSFP+ cable, MTP trunk cable, LC to MTP jumpers, etc.

Publicerat klockan 07:40, den 21 januari 2016
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