As per Turkish Telecom Specification Multi Loose Tube structure is made of an assembly of colored
tubes around a central strength element. Outdoor cables guarantees the protection of cable where the
mechanical damage risk exists and also to guarantee stability towards environmental influences such
as frost and humidity. The interstices between tubes and central strength member are filled with
petroleum jelly to prevent water penetration. Aramid yarns are helically applied over the tube
to provide additional tensile strength to the cable. Corrugated steel tape armour provides additional
mechanical (crush and rodent) protection with a high-strength ripcord under the armour for easy
stripping. Polyethylene (PE) inner and outer sheath are resistant to stress cracking and UV radiation.
These types of cables have a supporting messenger wire in a gure 8 con gura on and cable construction
according to Turkish Telekom specification.