Hughes LAN Systems of Mountain View, California has enhanced its ProBridge line of high performance internetworking products with the addition of spanning tree support for fault-tolerant networking, expanded system network management protocol manageability and a package of additional traffic management techniques: the enhancements will be available for the ProBridge 8033 Ethernet/Ethernet bridge, the 8133 Remote Ethernet bridge, ProBridge 8032 Ethernet to Broadband bridge and the ProBridge 8233 Ethernet to Broadband backbone bridge.