Polycom RMX 1500 Administrator's Manual page 315

Polycom RMX 1500/2000/4000 Administrator's Guide
2
In the Profile field, select a Profile in which the Operator Conference
option is selected.
Upon selection of the Operator Conference Profile, the Display Name
is automatically taken from the RMX User Login Name. This name
cannot be modified.
Only one Operator conference can be created for each User Login
name.
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