Communication cable for ducts

A communication cable for ducts belongs to the technical field of wires and cables. The communication cable comprises a cable core, a first lapped covering and a sheath layer, the cable core comprises a plurality of data wire pairs, and each data wire pair comprises a pair of conductors and covering layers respectively covering the conductors. The communication cable is characterized in that: the cable core also comprises second lapped coverings, third lapped coverings, a central reinforcement and earth wires, each data wire pair is lapped by one of the second lapped coverings, the second lapped coverings are lapped by the third lapped coverings, the number of the earth wires is equal to the number of the data wire pairs, the earth wires respectively accompany one of the data wire pairs, the central reinforcement is positioned in the center of the cable core, glass fibers are bundled together and covered by a polyester lapped tape to form the central reinforcement, and the data wire pairs surround the central reinforcement and are stranded on the central reinforcement. The communication cable has the advantages that: the communication cable can meet the requirement of large-angle laying in ducts; the communication cable can be adapted to environmental conditions well; and the communication cable can prevent outside moisture from entering the data wire pairs, thus guaranteeing the communication effect.