What is twisted-pair cable ? How to choose the right starlink cable ?

What is twisted-pair cable ?

Twisted pair cable is a type of guided media composed of two insulated copper wires. One wire transmits signals, while the other is grounded. Because the two wires are twisted together, it is called a twisted pair cable. Compared to parallel cables, twisted pair cables significantly reduce noise and crosstalk, ensuring that the signal remains undistorted during transmission.

Types of Twisted Pair Cables

Twisted pair cables are divided into two types: unshielded twisted pair (UTP) and shielded twisted pair (STP).

Unshielded twisted pair (UTP) consists of a pair of insulated copper wires twisted together without any additional insulation or shielding, hence the name "unshielded twisted pair cable."

Unshielded Twisted-Pair Cable

Advantages:

1. These cables are compact in size, cost-effective, and easy to install.

2. They are commonly used for short-distance transmission of voice and data.

3. Compared to other types of cables, they are more affordable.

Disadvantages:

1. Connections established using UTP are not secure.

2. They are only effective within a distance of 100 meters and must be installed with a maximum range of 100 meters.

3. The bandwidth of these cables is limited.

Shielded twisted pair (STP) cables have an additional protective layer in the form of extra insulation or a copper braid. This shielding provides strength to the overall structure of the cable. It also helps reduce noise and signal interference within the cable.

Shielded Twisted-Pair Cable

Advantages:

1. They are typically used for long-distance communication and transmission, often installed underground.

2. The protective shielding prevents external electromagnetic noise from penetrating the cable.

3. Compared to UTP, they offer higher bandwidth.

Disadvantages:

1. These cables are very expensive.

2. They require significant maintenance, which adds to the cost.

3. The cable segment lengths are similar to those of UTP.

Characteristics of UTP

UTP has excellent characteristics, making it easy to use, install, expand, and troubleshoot. Below is specification

EDUP Starlink Cable Features

The Starlink cables we produce strictly comply with the Starlink communication technology specifications, as well as the international standards ANSI/TIA-568 and ISO/IEC 11801, to ensure stable data transmission, low latency, and strong electromagnetic interference resistance.

• Twist Rate (or Twist Pitch):

1 to 3 twists per inch (or twist lengths of 10 mm to 40 mm).

• Variation in Twist Rate Across Pairs:

Pair 1: 2.5 twists per inch.
Pair 2: 2.7 twists per inch.
Pair 3: 2.8 twists per inch.
Pair 4: 3.0 twists per inch.

• Purpose of Twisting:

Interference Reduction: The twists cancel out electromagnetic fields, reducing external interference and crosstalk between adjacent pairs.
Improved Signal Integrity: Ensures reliable data transmission, especially for high-speed communication.

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