The
systems utilize a unique transmission method that confuses the decoding
circuits of cellular handsets as if no cellular base station is within
the service area. Upon activating the Blocker, all idle phones will
indicate "NO SERVICE".
Consequently,
all cellular phone calls already in progress within the defined area will
be cut-off and the radio link will be lost. When activated, incoming calls
are handled as if the cellular handset is OFF and calls may be routed into
a voice mailbox. When the Blocker is turned off, all
cellular handsets will automatically re-establish communications with the
cellular systems and provide full service.
Features
This
high power unit is Custom Made per order. It can contain up
to three system modules, each having a maximum output power of 10W (total
30W). The unit is housed inside a metal water resistant suitcase with a
built-in heat sink to meet extreme operating conditions for indoors and
outdoors applications. The unit can be locked so that only authorized personnel
can open it. Unit activation/de-activation by turning a key switch - suitable
for secure installations.
Configurable
for coverage of all types of cellular systems including analog (AMPS, TACS,
NMT) and digital (TDMA, CDMA, GSM, PCS).
Supplied
with a variety of directional or omni-directional external antennas.
Coverage
range varies between 20 and 200 meters. Item 4001-2 |
