7.9.1.1. Use external phone line
If this function has been chosen (Activation) the transmitter will be cooperating with
PSTN line. This way data transmission is possible from an alarm control panel with
two ways: via GPRS link and standard telephone line.
7.9.1.2. Monitor external phone line voltage
If transmission with two ways follows, it is necessary that operator of monitoring
system received information on access to an external telephone line. Choice of this
option will result in voltage drop on telephone line (longer that defined minimal time
of decay) that will be signalized with an adequate message sent via GPRS.
Note: The transmitter is to simulate a telephone line access if:
o A PSTN line is not connected
o A PSTN line is connected but has not been activated – option from clause 7.9.1.1
o Options from clause 7.9.1.1 and clause 7.9.1.2 are active and voltage on
terminals TIP-RING decreased below 8V.
7.9.1.3. Report off-hook
If a phone set is connected in parallel output of control panel communicator (to
terminals T1-R1 of transmitter), picking up of a phone prevent from exchange of
data between an control panel and a transmitter. There is possibility to control this
situation. Choice of this option result in sending a report to monitoring station if
time of picking up the phone exceeds determined time limit.
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