The Information Highway is a high capacity TDM-type bus. It is used by both the MGC-100 and the MGC-50. The Information Highway transfers information from the Network Interface Modules to the MUX Modules and from the MUX Modules to the Audio, Video and Data Modules except during IP calls. In IP calls (H.323 and SIP) the information is transferred directly to the IP network module and from there to the Audio, Video and Data modules.
Powerplane
The MGC-100, as opposed to the MGC-50, uses a Powerplane. Up to three Power Supply Modules can be plugged into the Powerplane. The Powerplane and Power Supply Modules are designed to accommodate hot swapping of power supplies.
In the MGC-50, there is one power supply, which is connected to the backplane and fans via wire leads.
