66251750-EN - V1.0 - 05/06/17
10
4000 Series Vandal Resistant Digital GSM - Technical Manual
4000 Series Vandal Resistant Digital GSM Audio Intercom with Proximity
Additional Components
ART. 432 GSM ANTENNA
The digital GSM also requires an antenna to function, the Art.432 GSM antenna
connects to the SMA female bulkhead connection on the rear of the digital GSM
module. A GSM antenna with an SMA male connector should be used (refer to
Fig.6).
Antenna Parts
1. GSM antenna with magnetic base.
2. Self-threading screw (Ø3.5mm x 9.5mm).
3. Aluminium L bracket for mounting.
4. SMA male connector (cable length 2.5m).
5. Expansion type wall plugs (Ø6mm).
6. Self-threading screw (Ø4mm x 30mm).
IMPORTANT NOTE: An antenna must always be tted for the digital GSM module
to work. Always route the GSM antenna cable away from the microphone wires
and the power supply wires to avoid interference on the speech channels.
Fig. 6
SMA female bulkhead
connection on rear of
digital GSM module
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