18.2.9.5. Network Wide Usage of Mobile HFA 
If TRADITIONAL clients are accepted both as HOME and VISITED
stations on a HiPath 4000 with SPE activated, this offers significant
improvements in the usage of the Mobile HFA feature within homogenous
HiPath 4000(1)/OpenScape
4000 (with or without SPE activated) networks.
IMPORTANT:
Mobile HFA cannot be used in networks between
HiPath 4000 (as of version 4)/OpenScape 4000 systems with SPE activated
and HiPath 4000 V2.0 / V3.0.
| (1) | As of HiPath 4000 V4 |