Equalization for ports of a crosspoint switch at least partially offsets transmission losses such as skin loss. The navigation transmission signal comprising a carrier signal, a navigation ranging signal, a data signal, and at least one subcarrier modulation signal. The filler may be formed from a plastics material and may be shaped, in cross section, to have a number of arms to enable it to separate other components of the cable. A substantially planar housing member has a support post which extends from an annular interior surface in adjacent, non-contacting proximity to the stub shaft projection to form a gap therebetween. The tubular container is composed of a resin tubular container, a sealing cap, an IC tag embedded in the sealing cap and composed of an IC chip and a first transmittingreceiving antenna, and a second transmittingreceiving antenna fixed to the tubular container.