Operation Manual

Template Module, Version 1.2, 11.09.2018,
N870 IP PRO Multicell System – Introduction
Gigaset N870 IP PRO / Admin IE-UK-International en / A31008-XXXXX-XXXX-X-XXXX / introduction.fm / 12/4/18
6
• Forming clusters
A cluster defines a set of base stations of a DECT manager that shall synchronise in order to
perform handover, roaming and overload balancing.
Handover means to switch a handsets DECT connection to a new base station during a call.
Roaming means to connect a handset in idle mode via a new base.
Overload balancing is the process to setup a DECT connection (for a call or other adminis-
trative or customer purpose) not at the current base station, which is fully loaded with active
DECT or media connections, but via a neighbour base station, which has free resources to
setup/accept the new DECT connection.
While handover and roaming is possible between base stations of different DECT managers,
overload balancing is only possible inside the area of one DECT manager.
Handover and overload balancing can only be provided by synchronised base stations. In
some cases, not all base stations connected to one DECT manager can be synchronised for
location specific reasons. To organize synchronisation just within a subset of base stations
connected to one DECT manager, you can form clusters, within a DECT manager.
A DECT manager can offer multiple clusters with base stations synchronised within the
cluster, but not synchronised along different clusters.
In multiple DECT manager installations, cross-cluster synchronisation is possible via DECT
manager synchronisation ( page 34).