The Management Card functions as the JumboSwitch’s central processing unit and the Main Card is the control bus access point for JumboSwitch management. There are two types of Main & Management Interface Cards: individual and combination. JumboSwitch 2U & 4U chassis options use individual cards and 1U & 2S options use the “combo card."
For the smaller 1U and 2S chassis options, a single Main/Management/Switch "Combo" Card is used.
The JumboSwitch Main/Management "Combo" Card is typically used by Utilities to connect substation RTUs/PLCs and telephones or T1/E1 links to a central control center.
It is also used by Data Service Providers for its modular multi-interface, rate limiting, one-fiber-bidirectional and media conversion capabilities.