600 Pair Hyat Jelly Filled Underground Telephone Cables for Duct/Direct-Burial

5/10/20/25/30/50/100/200/300/400/500/600/700 pairs HYA/HYAT telephone cable Applications: Distant telecomunication, suitable for direct buried, duct or aerial application.     Description:   1.Annealed pure copper wire insulated with HDPE, each two different color insulated wires twisted together into pairs. 2.Cable core wrapped with polyester tape to act as heat resistant barrier. 3.Aluminum tape wrapped and then with sheat Specification: Product NameCommunication CableProduct standardIEC 708-1(1998),YD/T322-1996(P.R.C)CoreGreater than or equal to 10Working life