I came across Cat 5 splitters or "economisers" that allow two connections through one 4-pair cable: http://www.amazon.co.uk/Ethernet-Net.../dp/B000Q6E C0C Is it possible carry voice and data using one 4-pair Cat 5 cable? Will there be any problems with
cross-talk slowing the data transfer rate? Will, for example, the burst of ringing current affect the data signal? Are adapters available ...