10
Projecting the DECT network
Gigaset N720 DECT IP Multicell System / engbt / A31008-M2316-L101-2-7619 / preparation.fm / 10.02.2012
Version 2, 06.08.2010
u What is the basic structure of the building?
– What materials and construction types have been used for the buildings?
– What type of windows does the building have (e.g., tinted glass)?
– What construction changes are expected in the near future?
u What disruptive influences can be identified?
– What are the walls made of (concrete, brick, etc.)?
– Where are the lifts, fire doors, etc. located?
– What furniture and devices are present or planned?
– Are there other wireless sources in the vicinity?
For detailed information on material characteristics and interference factors,
£ page 16.
Conditions for the positioning of the base stations
Features of the Gigaset N720 DECT IP Multicell System
u A Gigaset N720 DM PRO DECT Manager can manage a maximum of 20 base stations
and 100 handsets.
u The DECT network can be divided into clusters; i.e., you can install several independent
DECT islands that are managed centrally by a DECT Manager.
u A Gigaset N720 IP PRO base station can establish a maximum of eight connections
simultaneously (four connections in Broadband mode).
This must be taken into consideration in the capacity calculations (
£ page 13).
Technical conditions
The following values can be used as a guide for the planning. They are values that are
influenced by environmental conditions and that should therefore be checked via meas-
urements.
u The wireless range of a DECT base station for handsets is (guide values)
– Up to 50 m indoors
– Up to 300 m outdoors
These guide values do not apply to the maximum possible distance between two base
stations. To ensure the handover of a handset from the cell of one base station to the
cell of another, this distance is derived from the necessary overlap zone.
u Ensure adequately sixed overlap zones between neighbouring cells are taken into
consideration. For an interference-free handover, a spatial overlap of 5 to 10 metres
with satisfactory signal strength should be sufficient, even for fast walking. Neighbour-
ing base stations must be able to receive one another with sufficient signal strength to
guarantee the synchronisation and handover (
£ page 21).
