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Copper core solid or foam, foam skin polyolefin insulation unfilled (or filled) poly-al bonded integrated sheath inner city telecommunication cable is the telephone cable designed for inter-telephone and trunk main. It is mainly used in track lay, e.g., it can be stringed according to aerial line standard and also can be used for aerial (HYA). Integrated cable only can be used for aerial (HYAC). But, if cable is produced as 53-type (HYA53), it can be used for direct bury. The mechanical and electrical performance of the cable are keeping unchanged under –30oc to +60oc.
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