30-pair underground telephone cable
A 30-pair underground telephone cable is designed for outdoor installations requiring multiple telephone lines. It’s suitable for direct burial without the need for conduit, making it ideal for connecting telephone exchanges, data centers, or extensive telecommunications networks.
Technical Specifications
Conductor Material: Solid, annealed bare copper
Conductor Size: Typically 26 AWG (0.4mm)
Insulation: Polyolefin or high-density polyethylene (HDPE)
Filling Compound: Jelly-filled or petroleum jelly to prevent moisture ingress
Core Construction: 30 twisted pairs (60 individual wires)
Shielding: Aluminum foil or polyester tape for electromagnetic interference (EMI) protection
Sheath Material: Black polyethylene (PE) for UV resistance and durability
Sheath Thickness: Approximately 1.3mm
Bend Radius: Minimum installation bend radius of 120mm
Operating Temperature: -30°C to +70°C
Impedance: Typically 100 ohms
Compliance Standards: IEC 708-1, YD/T 322-1996
Applications
Direct Burial: Designed for direct underground installations without additional conduit.
Telecommunication Networks: Ideal for connecting telephone exchanges and network infrastructure.
Data Centers: Suitable for linking various equipment within data centers.
Rural Installations: Effective for extending telephone services to remote areas
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