Time transfer capabilities in the DTM transmission system

This article describes the enhancement of a commercial network system to include network wide time-transfer capability to meet customer needs for GPS independent timing of broadcast transmitters. The Dynamic synchronous Transfer Mode (DTM) transmission system is a network technology based on a 8 kHz Time Division Multiplex (TDM) structure, providing the basis for predictable and reliable transport and switching. With the adaptation of various native signals, it has found use in broadcast networks for both contribution and distribution networks. This article describe how the commercial DTM system was enhanced to include a time-transfer capability within the existing product range in order to support GPS independent transmission network for critical national broadcast networks operating DVB-T SFN transmissions.