30 pairs armored telephone cable GYTA53

30 pairs armored telephone cable GYTA53   Product Description What is the application of the cable ?                                                                Cable is mainly used to transmit audio,150k Hz and below ,the analog signals and 2048k bit/s and below, the digital signal.Under certain conditions, can also be used to transmit 2048 kbit /s or more digital singals.   -Installation: Duct or aerial(non-self-supporting aerial) What is the characteristic of the cable ?                                                                         1.Annealed pure copper wire insulated with HDPE, each two different color insulated wires twisted    together to a pair.   2.Cable core wrapped with polyester tape to act as heat resistant barrier.   3.Aluminum tape wrapped and then with sheath What is the electrical characteristics of the cable ?                                                    What is the physical characteristics of the cable ?