H3C Technologies H3C MSR 30 - Manual (Page 89)

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Figure 79 Press the spring button to make the card spring out a little
Figure 80 Continue pressing the spring button to release the card
CAUTION:
Do not insert or remove the card when the router is booting or the LED is blinking to avoid hardware
damage.
Replacing a Memory Module
NOTE:
The MSR 30-10/30-11/30-11E/30-11F does not support memory replacement.
This section describes how to replace a memory module. See the following flow.