标签归档:SFP-H10GB-CU3M

Fiberstore’s 10 Gigabit Ethernet Transceivers and Cables Frequently Asked Questions

What is the difference between SFP+ and SFP?

The pinouts of SFP and SFP+ connectors are identical. However, SFP has a maximum data rate of 5Gb/s whereas SFP+ is designed for 10Gb/s. The SFP receptacles and plugs are not as well impedance matched as SFP+ receptacles and plugs. Also SFP+ cable is designed for 10Gb/s whereas SFP cable may not be able to satisfactorily transmit that rate.

What is the distance supported by the SFP+ SR transceiver?

The supported distance is up to 300 meters depending on the quality of the multimode fiber (MMF) you use. Quality of MMF is listed as OM1 (up to 33 meters), OM2 (up to 82 meters), OM3 (up to 300 meters), and OM4 (up to 400 meters). Check with the supplier for the cable distance supported. Take GP-10GSFP-1S as an example, it is Dell Force10 10GBASE-SR SFP+ covering a distance of 300m over OM3 multimode cable.

Can I use SFP+ cables in SFP ports?

Yes, SFP+ cables are compatible to SFP ports and will work fine. SFP cables are not compatible to SFP+ ports. SFP+ receptacles have a mechanical feature to prevent engaging SFP plugs.

Do Fiberstore’s SFP+ direct-attach Twinx passive cables work with Cisco or other third-party switches?

Fiberstore’s direct-attach SFP+ Twinx passive cables are fully compatible with the original brand like Cisco. For example, SFP-H10GB-CU3M is Cisco SFP+ to SFP+ passive copper cable from Fiberstore which is fully compatible with Cisco switch. The following image shows that our professional trained staff tests the compatibility and interoperability of each optics to make sure our customers to receiver the optics with superior quality.

Fiberstore test program

What are the distances supported by cables to use with the 10GBase-T ports? Does Fiberstore offer these cables?

Data centers have a large installed base of Cat 5/6/7 twisted pair cables for the last decades—initially for 1000BASE-T and now for use with 1/10GBase-T infrastructure. Fiberstore does offer these cables since they are industry standard and widely available from us in various lengths and colors. Distances supported at 10 Gbps speed:

  • CAT 6A and CAT 7 cables supporting 100 meters
  • CAT 5e and CAT 6 cables supporting 55 meters

Do the SFP+ optical transceivers support 1 GbE operation?

Yes, they support 1GbE and 10 GbE dual rates and can be configured for 1 GbE.

Will the SFP+ optical transceivers auto-negotiate between 1 GbE and 10 GbE?

Auto-negotiation is not supported between the 10 GE and 1 GE speed. The transceiver must be manually configured to operate at 1 GE speed.

How do I use the SFP+ ports for 1000BASE-T?

You need to purchase Fiberstore’s SFP+ to 1000BASE-T Media Converter. (SFP+/Copper RJ45), part number FMC-1SFP/1RJ45-GB.

Is TwinX same as Twinax?

Yes.

Does the Twinx copper cable plug directly into the NIC and the switch?

Yes, the copper cable has an SFP+ or QSFP connector on both ends of the cable that directly plugs into the corresponding ports of the switch and NIC.

Should I use optical transceivers with the SFP+ and QSFP direct-attach Twinx copper cables?

No. These are direct-attach Twinx cables and come with connectors that plug directly into the SFP+ port or the QSFP port of the switch/NIC on either end. Transceiver cannot be used.

What is the advantage of SFP+ Twinx copper cable?

It is a low-cost option for shorter distances up to 5 meters.

Is 10GBase-T same as 10GBASE-T?

Yes. 1GBase-T is shorthand for 1000BASE-T and 10GBase-T is same as 10GBASE-T; they are the twisted pair implementations of 1 GbE and 10 GbE respectively.

What are the SFP+ copper cables provided by Fiberstore?

10G SFP+ copper cable

The above chart lists detailed information about some of the 10G SFP+ cables from Fiberstore. We also offer SFP+ copper cables that are fully compatible with major brand like Cisco, Juniper, Brocade, etc. The supported distance of this cable varies from 0.5m to 7m. Users can connect our SFP+ copper cable with top-of-rack (ToR) switch to realize 10G connectivity. For more information, please contact us directly.

Introduction to 10G SFP+ Twinax Cabling

Driven by the never-ending requirement for faster data-rate transmission, Ethernet technology has continually evolved from 1GbE to 10GbE and eventually to 100GbE. This demand for faster application speed has also spurred technological evolution on data carrying techniques. Consequently, fiber and copper transmission standards has been progressed, providing greater bandwidth for transporting data over Ethernet architectures with reduced cost and complexity. In today’s article, some detailed information will be provided on 10G SFP+ twinax cabling.

Why Implementing 10G SFP+ Twinax Cabling?
Many research companies forecast that 2016 will be the year of 100G. So why implementing 10G twinax cabling here? There are several reasons which will help you sort this out. Regardless of cost, most LAN infrastructures employ a mixture of copper and fiber premises wiring. 10GbE bandwidth are generally sufficient to support the transfer and streaming of large data, video and audio files. Thus there are no demands for greater network performance or application bandwidth. What’s more, costs associated with re-cabling a network can be exorbitant and organizations should take precautions to ensure their cabling systems can last well into the future. 10GbE twinax cabling provides the best assurance for being able to support forthcoming technologies and delivers utmost investment protection.

What Is 10G SFP+ Direct Attach Twinax Cable?
SFP+ Direct Attach Cable (DAC) is a copper 10G Ethernet cable which comes in either an active or passive twinax cable. The difference between them is that an active twinax cable has active electronic components in the SFP+ housing to improve the signal quality while a passive twinax cable is just a straight “wire” and contains few components. As such, they support different transmission distance. SFP+ DAC cables use SFP+ MSA and copper “twinaxial” cable with SFP+ connectors on both sides providing 10 Gigabit Ethernet connectivity between devices with SFP+ interfaces, which is expected to be the optimum solution for 10G Ethernet reaches up to 10 m.

Passive SFP+ Twinax Cable Assemblies
The passive SFP+ twinax cable is designed to support connections for 10 Gigabit Ethernet or Gigabit Ethernet switches with 10 Gigabit Ethernet uplink. Passive SFP+ cables, as noted before, have no electrical components and typical cover a distance of 1m, 3m, and 5m. For example, compatible Cisco SFP+ cables from Fiberstore like SFP-H10GB-CU3M, SFP-H10GB-CU1M, and MA-CBL-TA-1M, are programmed specifically to work with Cisco equipment. When these cables are plugged into Cisco equipment, they will not trigger the warning message that a non-Cisco transceiver has been detected. Figure 1 shows compatible Cisco SFP-H10GB-CU3M SFP+ to SFP+ passive copper cable with SFP+ connectors.

SFP+ Passive Copper Cable with SFP+ connectors

Active SFP+ Cable Assemblies
Active SFP+ twinax cables, compared with passive SFP+ cables can support longer transmission distance of 7m and 10m or up to 15m (distance may vary from vendors to vendors). For designs that only support SR and LR applications, active direct attach copper cable assemblies provide functions such as transmit disable and receiver loss of signal in addition to signal amplification, which makes it ideal for highly cost-effective networking connectivity between switches and servers. Figure 2 shows an active copper SFP+ DAC cable with SFP+ connectors.

SFP+ Active Copper Cable with SFP+ connectors

From these two pictures, we can see that there is no visual difference between active and passive SFP+ twinax cables. So, people should read the product specifications carefully before purchasing twinax cables.

Summary
SFP+ twinax cables offer a cost-effective way to interconnect 10G Ethernet devices within racks and across adjacent racks. These cables are usually accommodated into the SFP+ transceiver housing of a switch or server. Fiberstore SFP+ twinax DAC cables provide robust connections for leading edge 10GbE systems. We provide a full range of SFP+ DAC cables including SFP-H10GB-CU3M, SFP-H10GB-CU1M, EX-SFP-10GE-DAC-1M, JD097C, JD095C, etc. These SFP+ twinax cables are fully compatible with major brand. For more detailed information, please visit www.fs.com or contact us over sales@fs.com.