User's Manual

LZT 123 1836 83
7.4.1.2 Signal Strength
The wireless modem has to be placed in a way that ensures sufficient signal strength.
To improve signal strength, the antenna can be moved to another position. Signal
strength may depend on how close the wireless modem is to a radio base station. You
must ensure that the location at which you intend to use the wireless modem, is
within the network coverage area.
Degradation in signal strength can be the result of a disturbance from another
source, for example an electronic device in the immediate vicinity. More information
about possible communication disturbances can be found in section 8.3.5, page 59.
When an application is completed, you can verify signal strength by issuing the AT
command AT+CSQ or AT*E2EMM. See the AT Commands Manual for further details.
Before installing the wireless modem, use an ordinary mobile telephone
to check a possible location for it. In determining the location for the
radio device and antenna, you should consider signal strength as well
as cable length.
7.4.1.3 Connection of Components to Wireless modem
The integrator is responsible for the final integrated system. Incorrectly designed or
installed, external components may cause radiation limits to be exceeded. For
instance, improperly made connections or improperly installed antennas can disturb
the network and lead to malfunctions in the wireless modem or equipment.
7.4.1.4 Network and Subscription
Before the integrator’s application is used, the user must ensure that their chosen
network provides the necessary telecommunication services. Integrators should
contact their service provider to obtain the necessary information.
Integrators intending to use SMS in the application should ensure this is included in
their (voice) subscription.
Similarly, integrators intending to use GPRS for data services should also ensure that
this service is available on their network and in their account plan.
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