2N Fixed line replacement with 2N SmartGate - Manual v1.1.2 - Manual (Page 67)

SMS Sending Input 4.3
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4.3 SMS Sending Input
This universal input is intended especially for reporting alarm or error statuses of
any equipment provided with the appropriate contact (a relay contact, e.g.).
By activating this input (electric input pin interconnection) you send one SMS to
one pre-programmed telephone number.
Caution
 Do not use in life-supporting or property-protection applications because
of the character of SMS service and 2N® SmartGate equipment. The
manufacturer shall not be liable for health and property damage incurred
as a result of SMS sending failure.