Sony Ericsson TT4031 (SE-GM29) - Manual (Page 46)

Owner’s Manual Rev 1.0 Page 46 of 46
5.4.5 Possible Communication Disturbances
Possible communication disturbances include the following:
Noise can be caused by electronic devices and radio transmitters.
Path-loss occurs as the strength of the received signal steadily
decreases in proportion to the distance from the transmitter.
Shadowing is a form of environmental attenuation of radio
signals caused by hills, buildings, trees or even vehicles. This can
be a particular problem inside buildings, especially if the walls are
thick and reinforced.
Multi-path fading is a sudden decrease or increase in the signal
strength. This is the result of interference caused when direct and
reflected signals reach the antenna simultaneously. Surfaces such
as buildings, streets, vehicles, etc., can reflect signals.
Hand-over occurs as you move from one cell to another in the
GSM network. Your mobile application call is transferred from one
cell to the next. Hand-over can briefly interfere with
communication and may cause a delay, or at worst, a disruption.