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5. INSTALLATION OF THE MODEM
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LZT 123 7361 R1B
5.1.3 Connection of Components to GM29
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 modem or equipment.
5.1.4 Network and Subscription
• Before your application is used, you must ensure that your chosen
network provides the necessary telecommunication services.
Contact your service provider to obtain the necessary information.
• If you intend to use SMS in the application, ensure this is included in
your (voice) subscription.
• Consider the choice of the supplementary services described in
section “2.4.2 Short Message Service”, page 17.
5.2 How to Install the Modem
5.2.1 Power Supply
• Use a high-quality power supply cable with low resistance. This
ensures that the voltages at the connector pins are within the allowed
range, even during the maximum peak current.
• When the unit is powered from a battery or a high current supply,
connect a fast 1.25A fuse in line with the positive supply. This
protects the power cabling and modem.
5.2.2 Securing the modem
• Before securing the modem take into account the amount of
additional space required for the mating connectors and cables that
will be used in the application.
• Where access is restricted, it may be easier to connect all the cables
to the modem prior to securing it in the application.
• Securely attach the GM29 modem to the host application using two
3mm diameter pan-head screws of appropriate length as shown
below.