User manual

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 Never try to dismantle the modem yourself. There are no components inside the modem that can
be serviced by the user. If you attempt to dismantle the modem, you may invalidate the
warranty.
 The GT864 E Terminal must not be installed or located where the surface temperature of the
plastic case may exceed 85°C.
 All cables connected to the GT864 E Terminal must be secured or clamped, immediately adjacent
to the modem's connectors, to provide strain relief and to avoid transmitting excessive vibration
to the modem in the installation.
 Ensure the cables, supplying power, audio headset, and input cable to the GT864 E Terminal,
does not exceed 3 metres.
 To protect power supply cables and meet the fire safety requirements 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.
 Do not connect any incompatible component or product to the GT864 E Terminal.
CEP AG may refuse warranty claims where evidence of product misuse is found.
4.3 SIM card precautions
Before handling the SIM card in your application, ensure that you are not charged with static
electricity. Use proper precautions to avoid electrostatic discharges.
When the SIM card hatch is opened, the SIM card connectors lie exposed under the SIM card
holder.
Caution! Do not touch these connectors! If you do, you may release an electrical discharge
that could damage the modem or the SIM card.
When designing your application, the SIM card’s accessibility should be taken into account. We
always recommend that you have the SIM card protected by a PIN code. This will ensure that
the SIM card cannot be used by an unauthorized person.
4.4 Antenna precautions
If the antenna is to be mounted outside, consider the risk of lightning. Follow the instructions
provided by the antenna manufacturer.
 Never connect more than one modem to a single antenna. The modem can be damaged by radio
frequency energy from the transmitter of another modem.
 Like any mobile station, the antenna of the modem emits radio frequency energy. To avoid EMI
(electromagnetic interference), you must determine whether the application itself, or equipment
in the application’s proximity, needs further protection against radio emission and the