We are offering ethernet aggregation platform. Frm220-ch01, frm220-ch02 ethernet aggregation platform. description the frm220 product line includes various metal chassis sizes, which can hold from one to twenty frm220 slide-in modules. The frm220- ch01 is one slot chassis, which can be installed with one single width blade card for stand-alone applications. The available power options are external ac adapter, built-in ac, dc power or built-in ac+dc, ac+ac, dc+dc redundant power. The frm220-ch01m is one slot chassis with db9 console port for local management on supported cards, which can be installed with one single width blade card for stand-alone applications. The available power options are built-in ac, dc or built-in ac+dc redundant power. The frm220-ch02 is a two slot chassis, which can be installed with one double width blade card for stand-alone applications. The only available power supply option is an external ac adapter. The frm220-ch02m is a two slot chassis with db9 console port for local management, which can be installed with either one or two single width blade cards or one double width blade card. The available power supplies are built-in ac, dc or ac+dc redundant power. The frm220-ch02nmc is a two slot chassis and can be snmp managed when installing one frm220-nmc card for web, telnet, console and snmp management. The frm220-ch02nmc should always be used with an nmc card for management and one single width blade card. The frm220-ch02nmc available power options are built-in ac, dc or ac+dc redundant power. features fanless (ch01, ch01m, ch02) cooling fan (ch02m & ch02mnmc) supports db9 console port for local management (ch01m , ch02m) telnet, web, console, snmp management via nmc card (not included) (ch02mnmc) external power: dc12 internal power: ac, dc, ad, aa or dd redundant power (option)