Connection handover:
The call is terminated while
attempting to change to another BS.
Switch on range warning tone.
Check whether or not the BS to which the call is
handed over is in overload status (all radio channels
busy).
Check the BS.
Check the overlap sectors.
Is the radio quality RSSI value of the other BS okay (at
least 90) (see page 12-31).
Check the cable length differences between base
stations and Hicom 150 E OfficePro system (see page
12-51).
Check the cable cross section/paths of the a/b lines
from MDFU to the base station (see page 12-50, range).
12.8 Site selection for the base station
In order to identify the best sites for the base stations, a basic radio coverage test should be
carried out (in accordance with the information in the manual "Hicom cordless -
presentation/measurement equipment" (see List of documentation)). The following
information can only provide a basic knowledge and cannot take the place of a radio
coverage test.
General
Propagation conditions for radio traffic
in the free field with visibility
in industrial areas with reinforced concrete buildings and/or metal facades
indoors brick and lightweight materials,
attenuation values (dB) and range loss (%) in Table 12-3
indoors reinforced concrete buildings with a variety of interiors,
attenuation values (dB) and range loss (%) in Table 12-4
Base station: Wave propagation
Where must base stations NOT be installed?
Wo should base stations be installed?
Indoors Outdoors
Hicom 150 E Office Rel.1.0 Service Manual - 12 Cordless Multicell Integration CMI
http://cmweb01.mch.pn.siemens.de/e_doku/en/h150/h15/30/sh/2/15_12.htm (22 of 45) [06/04/2000 13:05:56]
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