The communication cable is broken. What about one of them?
There will be several pairs of wire backup in general communication cables, one of which can replace another pair if there is a problem. If no backup, can only add a cable, can choose a small log log HYA, minimum is 5 of the communication cable.
Communication telephone cable is a symmetrical communication cable used in city, suburb, industrial and mining enterprises and so on. It is often called local telephone cable. Its main features are logarithmic (up to thousands of pairs, usually 5 to 3600 pairs). Because of the low frequency and short communication distance, the line diameter is smaller than the long distance communication cable, generally 0.4mm or 0.5mm. The group structure of communication cable telephone of twisted group, quad and complex twisted pair 3. According to its core insulation and protective layer materials can be divided into paper insulation, lead sheathed cable, polyethylene insulation composite protective layer cable, ointment filling waterproof cable, plastic cable and so on.
Telecommunication cables can be divided into long distance communication cables for long distance transmission and regional communication cables for short distance transmission. Long distance communication cable can be divided into relay communication cable for connection and trunk long distance cable for communication between cities (also called trunk communication cable). Regional communication cables can be divided into local telephone cables and telephone offices, wires used for internal or external connections, distribution cables and office cables. Long distance cables are often integrated communication cables consisting of cables of different structures.
