Allied telesyn manufactures at-x900-24xt and at-x900-24xs gigabit layer 3+ expandable switches. These new additions to the company`s portfolio are essential where requirement of high performance network applications is more. These switches come with two 30 gbps expansion bays supporting a choice of modules, including a 10 gbe port module, a twelve 1 gbe port sfp module and a twelve 1 gbe [rj45] port module for better port flexibility and application versatility than other 1 ru gigabit ethernet switches on the market. The expansion modules can be used in a variety of configurations to provide tailored solutions that meet wide ranging physical networking requirements. Advantageous features include high flexibility, allied telesyn`s at -x900-24xt and at -x900-24xs layer 3+ switches provide maximum gigabit ethernet port density in a compact chassis. Both at -x900-24xt and at -x900-24xs comes with 10 gbe expansion modules and hot-swappable xfps that provide high-speed, high-capacity fibre uplinks, with the option of either 10 gbps or 20 gbps uplinkb capacity to the network core. Resiliency can be achieved by using two 10 gbe modules and mstp 1802.1 sl for fast failover on link failure. This is suitable for wiring closet aggregation of gigabit Productsto the desktop links and aggregating gigabit uplinks from other network switches.