In accordance with one or more embodiments, a system can include a plurality of cables, wherein each cable of the plurality of cables includes an insulation layer comprising a helix structure. The helix structure of each cable of the plurality of cables can facilitate formation of a plurality of interstitial pathways between the plurality of cables. The system can further include communication device coupled to the plurality of cables, where the communication device facilitates generating electromagnetic waves that propagate along the plurality of interstitial pathways without requiring an electrical return path. Other embodiments are disclosed.