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Twinax Cable Application Twinax Cables are mainly used with PCI or PCI-E Card for the short distance interconnection in the server room.

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Performance Feature

Stable Transmission Speed

Reliable Transmission

Various Length Selection

Wider Operating Temperature

Good for HPC

Good for Data Center

Twinax Cable Knowledge




FTTH Drop Cable and 7m XFP AOC

What is Twisted Pair Cable?



A twisted pair consists of a pair of insulated wires twisted together. It is a cable type used in telecommunication for very long time. Cable twisting helps to reduce noise pickup from outside sources and crosstalk on multi-pair cables.


Twisted pair cable is good for transferring balanced differential signals. The practice of transmitting signals differentially dates back to the early days of telegraph and radio. The advantages of improved signal-to-noise ratio, crosstalk, and ground bounce that balanced signal transmission bring, are particularly valuable in wide bandwidth and high fidelity systems.


QSFP+ Cables

QSFP+ Cables


Types of Twisted Pair


The two types of twisted pairs are:

1. Unshielded twisted pair (UTP)

2. Shielded twisted pair (STP)


Unshielded Twisted Pair (UTP)


The most commonly used form of twisted pair is unshielded twisted pair (UTP). It is just two insulated wires twisted together; it consists of color-coded copper wires, but does not include any foil or braiding as insulator to protect against interference; Wire pairs within each cable have varied amounts of twists per foot to produce cancellation; There are different categories of UTP; The following tabe shows the UTP categories, the No. of pairs in each, and the grade of cable each uses and how they are implemented.



No. of Pairs

Transmission Rate


Category 1


Voice grade

  • Used in telephone industry
  • Not suitable for long distance data transmission

Category 2


4 Mbps

  • Used for both data and voice transmission

Category 3



  • Required 3 twists per foot

Category 4



  • Requires 3 twists per foot
  • Used in IBM token ring networks

Category 5



  • Used in Ethernet and 100Base-X networks

Category 6


100Mbps and higher

  • Used in Ethernet and 1000Base-X networks


Shielded Twisted Pair (STP)


Shielded Twisted Pair

Shielded Twisted Pair


Shielded Twisted Pair (STP) cable is used to eliminate inductive and capacitive coupling. Twisting cancels out inductive coupling, while the shield eliminates capacitive coupling. Most applications for this cable are between equipment, racks and buildings. Shielding adds usually some attenuation to the cable (compared to unshielded), but usually not because in the case of balanced transmission, the complementing signals will effectively cancel out any shield currents, so shield current losses are negligible.


Sopto supplies high quality copper cables, like SFP+ Twinax Cables, XFP to XFP Cables and so on with reasonable price for cloud storage data centers applications. For the newest quotes, please contact a Sopto representative by calling 86-755-36946668, or by sending an email to For more info, please browse our website.