• Overview
  • Specifications
  • Colour Scheme

Polyethylene insulated jelly filled Telephone Cables are widely used for primary and Secondary distribution networks. The cables having single jacket are use as duct cables up to 2400 pairs as primary network. Secondary cables are directly buried and may Armoured with additional jacket of a tough weather resistance LDPE Compound.

The cables core are fully filled with gel type hydrocarbon base filling compound having the same dielectric constant and compatible with the insulation and jacketing materials. The cables are manufactured with high-grade materials according to REA & Pakistan Telecommunication Company Limited Specification or customer’s requirement

Cable Constructions:     


            Fully annealed high quality solid copper, the conductor sizes are 0.4, 0.5, 0.6 & 0.9 mm.


            Colour high molecular Weight High-Density Polyethylene (HDPE)

        COLOUR CODING    

            Colour are fully colour coded in accordance with PIC even count colour code.


   Two coloured insulated conductors are uniformly twisted together to form a pair, Varying lay length is designed to minimize  the cross talk and capacitance unbalance.


    Twisted pairs are assembled into unit of 12, 13, 25, 50, 100 pairs, when desired for lay-up reason the units are divided into two or more sub-units, which are bind with durably coloured polyethylene Tapes to from a compact and circular cable.


               The water resistant filling compound is applied to fill the air spaces within the cable core.


      A non-hygroscopic and dielectric heat resistant polyester Tape and Water Blocking Tape are applied helically having a suitable overlap.


      Get type hydrocarbon base compound is applied between the core wrap and shield.


       An Aluminum tape with co-polymer coating is applied over the cable core & sheath with Black Polyethylene compound.


                 Black High Molecular Weight Low Density Polyethylene (LDPE)


        An Identification Tape durable marked with the Manufacturer’s Name, year of Manufacture and Cable size, if required, is placed under the Core Covering Tape. Alternatively, these details may be printed on the outer jacket of cable length marking.


Construction Parameters
Fiber TypeITU-T G.657
Fiber Count01 or 02 Fibers
Strength Member

FRP (Fiber Reinforced Plastic)

2 x Parallel Robust strength members of are placed at two sides to keep mechanical strength)

Outer Sheath (Material)Low Smoke Zero Halogen (LSZH)
Outer Sheath (Color)White/Black
Outer Diameter of Cable2.0 ± 0.2mm * 3.0 ± 0.2mm (Nominal)
Outer Sheath PrintingManufacturer Name, Year of manufacturing & Type of Cable shall be marked with 1 meter intervals and cable length in running meters
Cable Weight18 kg/km (Maximum)
PackingSuitable Strong Reel
Cutting Length1000 Meter or 2000 Meter ± 5%
Optical Characteristics
Single Mode FiberITU-T G.657
Fiber Colour CodingAs per TIA/EIA-598A&C
Mode Field Diameter, μm8.6 to 9.5 ± 0.7
Cladding Diameter, μm125 ± 1
Core Clad Concentricity error, μm≤ 0.8 μm
Cladding Non-Circularity, %≤ 2 %
Cable Cut-off Wavelength, nm≤ 1260 nm
Chromatic Dispersion (ps/

≤ 3.5 @ 1310nm

≤ 18  @ 1550nm

Cabled Attenuation @ 1310 nm (dB/km)

Cabled Attenuation @ 1550 nm (dB/km)

≤ 0.40 (Max)

≤ 0.30 (Max)

Polarized Mode Dispersion (PMD) ps/√km≤ 0.2

Mechanical Characteristics

Temperature Range

Operating Temperature

Installation Temperature

Storage & Transportation

-20 °C to +70 °C at 100% Humidity

-10 °C to +50 °C

-20 °C to +70 °C

Tensile Strength (N) (Max)

> 500N

Crush Strength (N) (max)


Cable Bending Test

30mm (Dynamic)

15mm (Static)

Features & Benefits

  •          Light Weight & Soft
  •         High Tensile Strength
  •         Flexible & Bend Insensitive
  •         Flame Retardant

Cross Sectional Diagram


Drawing is for reference only