Cables by Type
Applications
● UTP Cat3:
Voice Communication: Used in older telephone systems for voice communication.
Voice Communication: Used in older telephone systems for voice communication.
Data Transmission: Suitable for low-speed data applications, such as 10Base-T Ethernet networks.
Residential and Small Business: Commonly used in residential phone lines and small business PBX systems.
● STP Cat3:
High-Interference Environments: Shielded versions are used in areas with significant electromagnetic interference (EMI) or radio frequency interference (RFI).
Industrial Settings: Suitable for installations where electrical noise is prevalent.
Voice and Data: Useful in older telephone systems and low-speed data applications requiring extra protection against interference.
Construction
Conductors: Typically 24 AWG solid copper wires.
Insulation: Each conductor is insulated with polyethylene or PVC.
Twisting: Pairs of wires are twisted together to reduce crosstalk and electromagnetic interference (EMI).
Sheathing: Outer jacket made from PVC or low-smoke zero halogen (LSZH) for fire safety.
Unshielded (UTP): No additional shielding around the pairs or the cable.
Shielded (STP): Each pair or the overall cable is shielded with a metallic foil or braid to protect against EMI and RFI.
Advantages
UTP Cat3:
Cost-Effective: Inexpensive and widely available.
Ease of Installation: Flexible and easy to work with.
Basic Needs: Sufficient for basic voice communication and low-speed data applications.
STP Cat3:
Improved EMI Protection: Provides better protection against electromagnetic and radio frequency interference.
Enhanced Signal Integrity: Reduces signal degradation in noisy environments.
Industrial Use: Ideal for areas with high levels of interference, such as factories or near heavy machinery.
Performance
Max Data Rate: Supports up to 10 Mbps data transmission.
Bandwidth: Up to 16 MHz.
Distance: Suitable for distances up to 100 meters for data transmission; longer distances possible for voice communication.
EMI Protection:
UTP Cat3: Low, due to the lack of shielding.
STP Cat3: High, due to the presence of shielding.
Specification
TIA/EIA-568: Telecommunications cabling standards.
ISO/IEC 11801: International standard for structured cabling.
Technical Parameters
| Frequency(MHz) | Impedance(Ω) | Attenuation(dB/100m) | NEXT(dB) | Nominal Velocity of Propagation |
| 1MHz | 85~115 | 2.1 | 64 | NVP 69% |
| 4MHz | 85~115 | 4.3 | 55 | NVP 69% |
| 10MHz | 85~115 | 6.6 | 49 | NVP 69% |
| 16MHz | 85~115 | 8.2 | 46 | NVP 69% |
| 20MHz | 85~115 | 9.2 | 44 | NVP 69% |
| 31.25MHz | 85~115 | 11.8 | 42 | NVP 69% |
| 62MHz | 85~115 | 17.1 | 37 | NVP 69% |
| 100MHz | 85~115 | 22.0 | 34 | NVP 69% |
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