“John Holland were completing pipe-jacking tunnels 1600mm wide up to lengths of 785m. We required com- munications to be available along the entire pipe length. The main challenge is the small diameter with many obstructions along the tunnel string. NLT was selected as part of a competitive bid and asked to present their solution onsite to confirm that it worked prior to John Holland issuing an instruction.” “The NLT Wi-Fi Voice Communications System has been successful and, most importantly, is simple to use without additional cables. The communications are now used for each tunnel entry.” Project summary Pipe Jacking operations are typically difficult situations for reliable voice communications. This problem has become a thing of the past for major Australian contractor John H

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