In the past few decades, Ethernet standard continuously evolves to meet the increasing demand for faster transmission speed, from 100BASE, 1000BASE to 10GBASE. At the same time, the data carrying technology also develops to provide great bandwidth for transporting data with low cost, such as the copper and fiber cables as well as optical transceiver modules.

In 10 Gigabit Ethernet, copper and fiber are used to transport data. Each one has its own advantages and disadvantages.

Copper is more cost-effective and easier to install. It suits best in short lengths applications, typically 100 meters or less. But when deployed over long distance, electromagnetic signal characteristics will influence its performance. Besides, bundling copper cabling can cause interference, making it difficult to employ as a comprehensive backbone. So copper cabling is widely used in PCs and LANs communication network instead of campus or long-distance transmission.

Compared with copper, fiber cabling is usually used for long distance communication among campus, and environments that need protection from interference, such as manufacturing areas. In addition, fiber cabling is more reliable and less susceptible to attenuation, which makes it suitable for data transmission distance over 100 meters. But fiber still has drawbacks. It’s more costly than copper.

Since 10 GbE technologies have changed, so have the cabling technologies. There are two main standards: IEEE802.3ae and IEEE802.3ak. Factors covered in these standards like transmission distance and equipment being used are helpful to determine the cabling strategy.

• IEEE802.3aeIEEE802.3ae standard updates the existing IEEE802.3 standard for 10GbE fiber transmission. The new standard defines several new media types for LAN, metropolitan area network (MAN) and wide area network (WAN) connectivity.
  
  10GBASE-SR – it supports 10GbE transmission over standard multimode fiber (850 nm) for distances of 33 and 86 meters. The SR standard also supports up to 300 meters using the new 2000MHz/km multimode fiber (laser optimized). For example, the HPE J9150A 10GBASE-SR SFP+ transceiver from FS.COM can achieve the max distance of 300m over OM3 multi-mode fibers.
  
  10GBASE-LR – it uses optics (1310nm) and supports single-mode fiber up to 10 km.
  
  10GBASE-LX4 – it can support multimode fiber for distances up to 300 meters using Coarse Wavelength Division Multiplexing (CWDM). The LX4 standard also supports single-mode fiber for up to 10 Km. LX4 is more expensive than both SR and LR because it requires four times the optical and electrical circuitry in addition to optical multiplexers.10GBASE-ER – it uses optics (1550nm) to support single-mode fiber up to 30 km.
  
  
• IEEE802.3ak / 10GBASE-T10GBASE-T is the latest proposed 10GbE standard for use with unshielded twisted-pair (UTP) style cabling. This standard is to improve the performance and increase the transmission distance at a lower cost. Category 5 (Cat 5) and Category 6 (Cat 6) are the most common cabling systems being installed today. But Cat 5 can’t meet the bandwidth demands of 10GbE’s transmission. To meet the needs of 10GbE, manufacturers create Category 6A (Cat 6A), designed with existing Cat 6 cable but measured and specified to higher frequencies. In addition to Cat 6A, 10GBASE-T will operate on Category 7 (Cat 7) cables.

Except the cabling, transceivers also need to be considered for the network connectivity. Transceivers provide the interface between the equipment sending and receiving data. 10GbE has four defined transceiver types, including XENPAK, X2, XFP and SFP+ (Small Form-factor Pluggable Plus). These transceivers are pluggable and are compliant with 802.3ae standard.

Among them, SFP+ is the smallest 10G form factor. And it can interoperate with XENPAK, X2, XFP interface on the same link. Fiberstore provides a number of interfaces attempted to satisfy different objectives including support for MMF and SMF compatibility, such as SFP-10G-SR, SFP-10G-LR, SFP-10G-ER, SFP-10G-ZR, etc. For example, SFP-10G-SR transceiver module can support 300 meters data transmission distance over 850 nm multimode fiber. And SFP-10G-LR module (eg. J9151A) supports the link length up to 10 kilometers over 1310 nm single mode fiber.

As the 10G cabling technologies improved and 10G costs decreased, the 10G connectivity market has already mature. FS.COM provides detailed 10G connection solutions, including optical transceivers, patch cables, cable management products for transmission over both long and short distances. Each optics here is fully tested to ensure its 100% compatibility.

Posted by: jowang at 09:28 AM | No Comments | Add Comment
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