Communications cables can be used for PA systems, intercoms, telephone systems, remote control circuits, security, background music, other alarm systems and data transmission. This category is comprised of network cable, ethernet cable, internet cable, fiber optic cable and many others. Because of their insulation, communication cabling is less prone than wireless systems to interference and signal leakage. Lastly, they can provide a power consumption advantage over wireless systems that require electrically powered transmission hardware. For more on cabling and wire, see our electric wire & cable, building wire, and coaxial cables.