Summary: Army Instructional film on the laying of telephone cable in the field, by vehicle and on foot. The recommended techniques for laying cable across roads and streams, under bridges and along roadsides is given in detail. Preparation, briefing and starting of a cable lay is shown, the composition of teams and equipment carried by men and vehicles described and the place of line communications in a brigade and divisional context explained. The importance of proper planning, briefing and testing is emphasised throughout.