Polycom DOC2559A - Manual (Page 13)

Polycom RMX 4000 Hardware Guide
1-7
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The RMX switches between MPMx and MPM+ Card Configuration Modes
when MPM+/MPMx cards are removed or swapped while the system is
running.
•
The switch between Card Configuration Modes occurs during the next
restart.
•
Installing or swapping MPM+/MPMx cards while the system is off will not
cause a switch in the Card Configuration Mode when the system is restarted
– it will restart in the Card Configuration Mode that was active previous to
powering down.