Abus FUMO50001, Инструкция по установке и руководство пользователя

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Functional principle and features
7

The external antenna
– which is used to improve poor GSM levels –
may only be installed outside of the alarm panel. As the module
already has an internal antenna, this is optional but its use is
recommended.

Incorrect or unclean installation work may lead to erroneous
interpretation of signals. The consequences of which may include
false alarms. The costs incurred by potential dispatches of rescue
services, such as the fire service or police, must be borne by the
operator of the system.
Caution

The alarm panel must be powered off to install the module, and in
order to do this the backup battery must be unplugged. No liability is
accepted for any damage caused in the event of non-observance.
Any guarantee claims will also be invalidated in the event of non-
observance.