Category Archives: Copper Networks

Why Choose Passive SFP+ DAC Cable?

Passive SFP+ direct attach copper (DAC) cables, or SFP+ to SFP+ passive copper cables, are 10Gbps cables assembly. The cables are compliant with SFF-8431 specifications and provide connectivity between devices using SFP+ ports. And these cables use state-of-the-art signal processing technology to fill the expanding need for cost effective data center interconnects. Why would you choose passive SFP+ DAC cables? Information about passive SFP+ DAC cables will be offered in this article.

Overview

Passive SFP+ DAC cable assembly is fully compliant to the SFF-8431 SFP+ MSA. The cable construction is a 100 two pair shielded twinax with drain wires for digital ground. Passive SFP+ DAC cable allows for a serial data transmission up to 12Gbps in each direction. The passive design has no signal amplification in the cable assembly. Electronic Dispersion Compensation (EDC) is typically used on host board designs when passive copper cable assemblies are utilized. EDC allows for an extended length of passive cable assemblies. The mechanical design of the braid crimp and EMI skirt ensure that EMI radiation is sufficiently suppressed. Additionally, the copper cable acts as a natural heatsink. The low power consumption assists in making the passive copper cable assembly an economic solution for within rack or rack to rack applications. The following picture shows an HP J9281B compatible SFP+ to SFP+ passive copper cable.

HP J9281B Compatible SFP+ to SFP+ Passive Copper Cable

Why Choose Passive SFP+ DAC Cables?

There are many solutions for 10G Ethernet applications. Why would you choose SFP+ to SFP+ passive copper cables? As the development of fiber technology, SFP+ to SFP+ passive copper cable still has its advantages in the market. Now, passive SFP+ DAC cables can support higher data rates than traditional copper interfaces. With the development of copper cable technology, passive SFP+ DAC cable is interchangeable and hot swappable with fiber optic modules. And most importantly, SFP+ to SFP+ passive copper cables are suitable for very short distances including 1m, 3m, 5m, 7m, 10m, etc. They offer a highly cost-effective way to connect within racks and across adjacent racks. SFP+ copper modules allow hardware manufactures to achieve high port density, configurability and utilization at a very low cast and reduced power budget.

Applications of Passive SFP+ DAC Cables

The SFP+ to SFP+ passive copper cable assembly meets 10 Gigabit Ethernet, Fiber Channel and other industry standard requirements for performance and reliability. They support multiple protocols such as Gigabit & 10G Ethernet, 1, 2, 4, 8, and 10G FC, Fibre Channel over Ethernet (FCoE) serial data transmission, and Infiniband SDR, DDR, and QDR. SFP+ to SFP+ passive copper cables are high performance I/O solutions for 10G Ethernet and 10G Fiber Channel applications.

Conclusion

Passive SFP+ drect attach copper cable is a low cost, low power consumption and low latency solution that is ideal for high-density, in-rack 10Gb/s connections between servers and switches. Fiberstore manufactures and supplies a complete range of passive SFP+ drect attach copper cables for your applications. We provide compatible passive SFP+ DAC cables as alternatives to those branded companies like Cisco, HP, Juniper. For example, Cisco SFP-H10GB-CU1-5M compatible SFP+ to SFP+ passive copper cable, HP J9285B and HP JG081C compatible SFP+ to SFP+ passive copper cable, all these passive SFP+ drect attach copper cable are with high quality and fully compatible with their branded companies.

QSFP+ Passive Cable Overview

Driven by the ever-increasing server speeds and storage explosion, enterprises today are migrating infrastructures from 10Gb/s to 40Gb/s and establishing a framework for 100Gb/s systems. QSFP cable provides a cost-effective solution for interconnecting high speed 40GbE switches and servers. This post will provide an overview of the 40GE QSFP+ passive cable, helping users to take maximum advantage of the 40GbE architecture to come up with the appropriate interconnects and cost-effective selection.

What Is QSFP+ Passive Cable?

QSFP+ (quad small form-factor pluggable) passive cable is an extension of the established I/O interface system SFP+ and was developed for 40Gb/s Ethernet and 40Gb/s Infiniband QDR (quad data rate) applications. 40GbE passive copper cables provide robust connections for leading edge 40Gbit/s systems. They are compliant with SFF-8436, QSFP+ MSA, specifications and provide connectivity between devices using QSFP ports. 40Gb/s passive cable fill the need for short, cost-effective connectivity in the data center. Passive cables require no additional power to ensure quality connectivity. 40GE QSFP+ passive cables have extremely low power consumption which improves data center power consumption and thermal efficiency. The QSFP+ passive cable assemblies are high performance, cost effective I/O solutions for 40G LAN, HPC and SAN applications. Two main kinds of QSFP+ passive cable will be introduced here. They are QSFP+ to QSFP+ passive cablesand QSFP+ to 4SFP+ passive cables.

QSFP+ to QSFP+ Passive Cable

QSFP+ to QSFP+ passive direct attach cables are hot-removable and hot-insertable. A QSFP+ to QSFP+ passive cable consists of a cable assembly that connects directly into two QSFP+ modules, one at each end of the cable. The cables use integrated duplex serial data links for bidirectional communication and are designed for data rates up to 40Gbps. There are various QSFP+ to QSFP+ passive cables branded by famous brands, like Cisco, HP, Juniper, Brocade, etc. For example, Cisco QSFP-H40G-CU5M and Arista CAB-Q-Q-3M QSFP+ to QSFP+ passive copper cable, they are with high quality. The following picture shows a Cisco QSFP-H40G-CU5M QSFP+ to QSFP+ passive cable.

QSFP+ Passive Cable

QSFP+ to 4SFP+ Passive Cable

A QSFP+ to QSFP+ passive cable has a high-density QSFP+ connector on one end with the 4 SFF-8431 compliant SFP+ connectors on the other end. It features a positive retention pull-release latch system for ease-of-use. QSFP+ to 4SFP+ hybrid passive cable assemblies are a cost-effective, low-power alternative to optical modules for short reach links in high speed interconnect applications. The cables enable 40G QSFP+ breakout to 4x10G SFP+ ports, optimizing data center solutions for connecting 40G Ethernet ports to 10G Ethernet switches and adapters. Each QSFP+ to SFP+ hybrid passive cable is fully shielded by design utilizing a combination of shielded twinaxial cable and robust die cast housings with actuating pull latch. The QSFP+ to 4 SFP+ passive copper assemblies are manufactured using automated welding for unmatched consistency because the welding process results in less dielectric shrink-back than soldering. The following picture shows a HP JG331A QSFP+ to 4SFP+ passive breakout copper cable.

HP JG331A Compatible QSFP+ to 4SFP+ Passive Breakout Copper Cable

QSFP+ direct attach cable assemblies offer a high-speed and cost-effective alternative to fiber optics in Ethernet, Fibre Channel, and InfiniBand technology applications. The cable assemblies enable hardware OEMs and data center operators to achieve higher port density and configurability at low costs, while helping to reduce power consumption. Fiberstore is a professional fiber optic products supplier and manufacturer. We not only have the 40G QSFP+ passive cable, but also offer active versions of QSFP+ straight and breakout copper cable assemblies for your various applications.