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 disturbances it might cause. Protection is secured either by shielding the surrounding electronics or by moving the antenna away from the electronics and the external signals cable.

The modem and antenna may be damaged if either come into contact with ground potentials other than the one in your application. Beware, ground potential are not always what they appear to be.

If the application containing the TT4031 (SE-GM29) uses an antenna which is less than 20cm away from any part of the user’s body, integrators are legally obliged to publish SAR figures for the product. SAR testing is the responsibility of the system integrator.

Even if SAR measurements are not required it is considered good practice to insert a warning in any manual produced, indicating it is a radio product and that care should be taken.

The TT4031 (SE-GM29) module is FCC approved for fixed and mobile applications. If the final product after integration is intended for portable use, a new application and FCC ID is required.

Owner’s Manual

Rev 1.0

Page 41 of 41