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FIBOCOM FG621-LA Series Hardware Guide
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1 Foreword
1.1 Document Introduction
The document describes the electrical characteristics, RF performance, dimensions, and application
environment, etc. of FG621-LA series wireless module. With the assistance of the document and other
instructions, the developers can quickly understand the hardware functions of FG621-LA series module
and develop products.
1.2 Safety Precautions
By following the safety guidelines below, you can ensure your personal safety and help protect the
product and work environment from potential damage. Product manufacturers need to communicate the
following safety instructions to end users. In case of failure to comply with these safety rules, Fibocom will
not be responsible for the consequences caused by the user’s misuse.
Road safety first! When you drive, do not use the handheld devices even if it has a
hand-free feature. Please stop and call!
Please turn off the mobile device before boarding. The wireless feature of the mobile
device is not allowed on the aircraft to prevent interference with the aircraft
communication system. Ignoring this note may result in flight safety issue or even
violate the law.
When in a hospital or health care facility, please be aware of restrictions on the use of
mobile devices. Radio frequency interference may cause medical equipment to
malfunction, so it may be necessary to turn off the mobile device.
The mobile device does not guarantee that an effective connection can be made under
any circumstances, for example, when there is no prepayment for the mobile device or
the (U)SIM is invalid. When you encounter the above situation in an emergency,
remember to use an emergency call, while keeping your device turned on and in areas
where signal is strong.
Your mobile device receives and transmits RF signals when it is powered on. Radio