Technical Section

Product Name: “Noan‑G10F” Underground Telephone Cable
Application: Underground telephone lines with ten simultaneous pairs, suitable for underground paths, ducts, and indoor environments requiring protection against noise and environmental conditions.

Internal Structure

Conductor: CCAM (Copper‑Clad Aluminum) with 60/0 structure (60 very fine strands)
Effective Conductor Area: Designed according to project requirements (e.g., approximately ~0.13 mm² or ~0.17 mm²)
Pair Structure: Ten twisted pairs
Shield: Laminated aluminum foil longitudinally wrapped around the core assembly (100% coverage)
Drain Wire: Auxiliary conductor (copper or tinned copper) for connecting the shield to ground
Insulation per Conductor: PVC or PE suitable for underground use
Outer Jacket: UV-resistant PVC or composite for outdoor installation

Electrical and Performance Specifications

Conductor Diameter: According to a similar 10-pair reference cable with ~0.60 mm conductors
Conductor Resistance at 20 °C (Max): ≤ 186 Ω/km for ~0.60 mm conductor
Insulation Resistance (Min): ≥ 5000 MΩ·km
Test Voltage: AC 1500 V (1 min) / DC 2250 V (1 min) without breakdown
Operating Temperature: ‑20 °C to +60 °C
Capacitance and Impedance: Twisted pair design minimizes crosstalk and pair-to-pair interference
Minimum Bending Radius: 10× the overall cable diameter (or according to manufacturer guidelines)

Installation and Maintenance Notes

Install in ducts, underground, or protected pathways
Protect passage points with clamps or protective sleeves
Connect shield to ground at a single point for optimal performance
Maintain bending radius and avoid sharp bends
After installation, perform insulation resistance and line performance tests

Content Section

Ten-Pair Shielded Underground Telephone Cable “Noan‑G10F”

Noavar Niroo Paytakht Company is proud to introduce the “Noan‑G10F” cable; this “ten-pair underground telephone cable with full foil shielding” is designed for indoor and underground environments requiring simultaneous transmission of multiple telephone lines. Lightweight CCAM conductors with 60/0 strand structure, combined with proper insulation and aluminum shielding, ensure high performance against environmental interference. The “Noan‑G10F” cable is suitable for urban or intercity projects needing multiple telephone lines along an underground path, providing environmental durability, stable signals, and reliable performance.

Key Features:

Ten twisted pairs
Full foil shield around the core assembly
Lightweight CCAM conductors with 60/0 structure
Robust design for indoor and underground installation
High insulation resistance
Reliable performance in various environmental conditions

Description, Applications, and Comparative Analysis

Suitable Applications:

Underground telephone lines with a high number of pairs
Underground or in-structure routes in telecom projects
Areas with high electromagnetic interference potential
Urban or rural areas requiring multiple lines in a single path

Advantages:

Supports multiple telephone lines simultaneously without separate cables
Effective protection against environmental noise thanks to foil shielding
Reduces installation cost by using a single cable for multiple pairs
Lighter weight and lower cost compared to fully copper cables

Disadvantages:

Higher conductor resistance than fully copper cables
Shield performance reduces if grounding is not correctly implemented
Precise installation and adherence to standards are critical
Signal loss may be noticeable over longer distances

Comparison with Lower-Pair Models:

Compared to one- or two-pair cables, the ten-pair cable has higher core density, which may increase crosstalk; precise twisted pair length and continuous foil are essential
Production cost is relatively higher, but the benefit of transmitting multiple lines in a single cable is significant

Quality Assurance and Production Control:

Accurate strand count (60 strands) and uniformity of conductors
Ensured foil thickness, adhesion, and quality
Insulation testing, thermal aging, mechanical and vibration testing for samples
Product name, company name, technical specifications, and production date printed on the cable
Delivery of insulation resistance and performance test reports to the customer