The thesis is concerned with the transmission and reception of
digital data at 19,200 bit/s over voice-frequency telephone channels.
Following a feasibility study based on both practical and theoretical
constraints, the telephone network itself is investigated to determine
methods of circuit characterisation and the causes and effects of distortion
and other signal impairments. [Continues.]
A Doctoral Thesis. Submitted in partial fulfilment of the requirements for the award of Doctor of Philosophy at Loughborough University.