The sending/receiving unit of an STM switch is provided with a converting circuit for converting time division multiplexed frames of an STM network to cells of an ATM network and a converting circuit for converting cells of an ATM network to time division multiplexed frames of an STM network. The STM...http://www.google.de/patents/US6529523?utm_source=gb-gplus-sharePatent US6529523 - Converting circuits and bandwidth management apparatus in mixed network