S4 Security Information
S4 factory default will permit S4 to answer an incoming call
from any phone. This is to permit best flexibility so that the
Owner may install the S4 or the Owner may arrange for an
installation shop to do the installation.
In default state [factory default PIN is 12345], the Installer
can use any mobile phone to control S4 using text message
(SMS) or by calling S4. When basic installation and basic
S4 operations have been verified, then the Installer or the
Owner sends a text message that sets the Owner’s mobile
phone in the S4. Once this is done, S4 will only respond to
incoming phone calls from the Owner’s mobile phone.
Then the Owner sends a text message that changes the
PIN number to a secret PIN that is chosen by the Owner.
Once this is done, S4 will only respond to text messages
with the Owner PIN.
There are two exceptions –
•
If the Owner sends S4 a text message instructing S4 to
‘authorize’ a particular phone number, S4 will accept certain
commands from that phone number (provided the message
has the Owner’s PIN). This permits the Owner to authorize
up to two emergency contact numbers.
•
If the Owner (or authorized phone) has commanded S4 to
call 911 and the 911 call should be suddenly terminated, S4
permits 911 to call back to S4 and S4 will answer for a
prescribed period time. Otherwise S4 will not accept a call
from 911 or any other non-authorized number.
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