H3C Technologies H3C MSR 20-2X[40] - Manual (Page 11)

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LED Description
ESM
ESM module LED:
• Green and slow blinking means the system is booting.
• Green means ESM card is operation normally.
• Yellow means ESM card is malfunctioning.
• Steady OFF means no ESM card is present.
Table 3 Rear panel LEDs of an MSR 20-20 router
LED Description
LINK
• OFF means no link is present.
• ON means a link is present.
ACT
• OFF means no data is being transmitted or received.
• Blinking means data is being transmitted or received.
CF
• Steady green means a CF card is present.
• Green and blinking means the CF card is reading/writing data. To prevent data
corruption, do not remove the running CF card.
• Steady yellow means the present CF card is malfunctioning.
• Steady OFF means no CF card is present or the present CF card cannot be identified by
the system.
MSR 20-21 Router
Appearance
1. Front view
Figure 3 Front view of an MSR 20-21
(1) Power LED (PWR) (2) System LED (SYS)
(3) ESM LED (ESM)
2. Rear view