VoiBridge
www.topex.ro
installation manual
page
13
Note: The operation described above must be performed for all SIM card insertion and also when you
want to replace (change) the existing SIM card with a new one.
Warning: When inserting / extracting the SIM card the equipment must be powered off to avoiding
damaging the internal modules.
2.5 Connecting the antenna
Depending on the device type, TOPEX VoiBridge has either one or several connectors for
antenna(s). You should pick the type of antenna that is best for your current location (depending on
the installation site, the current field strength, frequencies used by the mobile carriers you want to
connect to y etc.).
The TOPEX equipment may use different types of individual (discreet) or collective antennas.
The standard issues are stick-type magnetic-base antennas, while upon request, special antennas
are available, such as high-gain, directional Yagi type (see details below).
The antennas have a 2,5 m length connection cable and a base with magnet for fastening to a
ferrous support. The base is heavy, so the antenna will stand upright even if you place it on a flat
surface that is not metallic.
Note:
The delivered antenna corresponds to the mobile module type from the equipment. Below is
presented an example of an omni directional magnetic antenna with its respective specifications.
Type: “magnetic base antenna”
Directivity: omni directional
Frequency: Multiple bands ( 890 to 960, 1710 to
1880, 1850 to 1990 MHz and 1920-2170 MHz)
Gain: 2 dbi
Polarization: vertical
Height: 72,5 mm total, 43mm active stick
Cable: RG174, length 2,5m
End connector: SME female
Magnetic base: diameter 2,8 cm
