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http://www.echelon.com/products/oem/transceivers/twisted_pair/bustop.htm
Bus Topology Twisted Pair Transceivers
The TPT/XF Twisted Pair Transceivers are designed for use in bus wiring topology applications. They include a transformer-isolated communication transceiver and connectors for power, the Neuron Chip communications port (CP) lines, and the twisted pair bus. The TPT/XF transceivers are available as a 1.25Mbps transceiver (Model 50020-10).
E-mail: info@telesys.ru