The following table depicts the C25 back panel.C25 Management and Data Port LEDs describes the management and data port LED functions.

| 1 | AC fan | 6 | VGA connector (not used) | 
| 2 | AC Power supply | 7 | Serial connector (console port) | 
| 3 | Mouse connector (not used) | 8 | USB connector (2 x USB 2.0) | 
| 4 | Management port (1 x GbE) | 9 | Keyboard connector (not used) | 
| 5 | Data port (2 x 1GbE), RJ45 | 
C25 Management and Data Port LEDs
| Port | LED | Function | 
|---|---|---|
| Management | (left) Network speed | Off = 10Mbs | 
| Green = 100Mbs | ||
| Yellow = 1000Mbs | ||
| Management | (right) Activity/Link | Off = No Link | 
| Green = Active Link | ||
| Blinking Green = Network Activity | ||
| Data | (left) Network speed | Off = No connection or 10Mbs | 
| Green = 100Mbs | ||
| Amber = 1000Mbs | ||
| Data | (right) Activity/Link | Off = 10Mbs | 
| Yellow = Active Link | ||
| Blinking Yellow = Data Traffic |