... Certificated 2.Competitive Price 3.HYVP 4.Telephone Communication System-specific Lines. indoor telephone cableType:HYVP 1×4×0.4Product Description ... rate: ≥75%Use:Many paired logarithmic of the telephone communication cables, The use of twisted pair data cable ... fax, program-controlled switchboards, Digital Equipment Connection, Integrated system of telecommunications branch lines and trunk, etc.