10.52.9.2. Service Information 
- You must connect the new device type to the new PEN following changes to the configuration.
IMPORTANT:
A device changeover from optiset E to optiPoint 500 is
not supported by AMO SXSU because this changeover is automatically detected
by the system.
- All other terminal types must be deleted and then re-assigned!
IMPORTANT:
Existing group assignments are not lost.