Polycom DOC2230A - Manual (Page 19)

MGC-50/MGC-100 Getting Started Guide
2-5
Figure 2-4 shows the rear panel of the MGC-100 NEBS Standard.
The rear panel, as in the standard MGC-100, provides access to the
network I/O card connectors and fans. I/O cards are inserted via the
rear panel.
Figure 2-4: MGC-100 NEBS Standard Rear Panel with External Connectors