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The system is compatible with
any mobile network and most land line networks (the system requires a DTMF
(touch-tone) compatible network - so if you use a tone phone or modem
(i.e. one that dials using short tones rather than a series of pulses you
are OK - if not check with your telecom provider.
Weak mobile signals can be boosted by the addition
of an extended antennae.
A SIM card is required for the unit - these can be
obtained in your country for a very small fee.
Where no signals are available a radio / pager
option is available (you will need to apply for a radio license in your country - usually about £100 per year).
The radio pager system has a typical range of 2km when lines of sight are good.
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