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THE CT 952 in brief
The CT952 is a bi-directional GSM telephone dialler. It is able to send different alarm with voice or
through SMS text messages.
Thanks to the fast data transmission it is also able to verify every single second the good working of
the module, the good network coverage, the signal level and the power. If any problem occurs it will
enable an open collector output for an outgoing signal and it will do an automatic system restore.
The programming and the use of the CT 952 is simplified by a VOICE that will guide the user step by
step throughout all the operations to be done.
The device can be completely remotely controlled from a remote telephone for programming and for
control the outputs.
The inputs are 8. The first 4 can be set as NC (normally closed) or NO (normally open) according to
the jumper position. The second four are only NC. The inputs need an impulse activation and the
minimum impulse duration is 0,5 seconds.
The open collector outputs are 8 (6 impulsive or stable settable and 2 only impulsive).
By using the 5 DIP Switches on the card it is also possible to enable various functions in order to
improve the security and the versatility of the device.
Output 7 (OUT RING) gives an indication of the incoming calls when dip switch 3 (ANSWER
DISABLE) is on
The use of the input RESET with output 8 (ON/OFF) allows to remotely control a system with vocal
feedback of the system status when dip switch 4 (SYSTEM STATUS) is on
The 14 vocal messages and the 14 SMS are freely settable by the user.
The dialler allows to have massages with different length, since the recording time is managed in a
dynamic way. The only limit is the sum of the length of different messages, that cannot be longer
than 1 minute.
The possible events that enable a vocal call or a SMS text message to be sent are14.
Among the call events the CT 952 GSM manages :
- Supply voltage (poor, good)
- Periodic LIFE TEST Signalling (Life test call)
- SIM card expiry date signalling (the number of days before SIM card expires is settable)
The CT952 can send vocal messages to 16 telephone numbers (max 16 digits). Each number can be
freely used in each call cycle. It is also possible to set the number of attempts that the CT 952 has to
do in order to call a telephone number and how many times the message has to be repeated before
stopping the call.
The person that has been reached can avoid to be recalled or can stop the all cycle. Each SMS
message is sent to a telephone number that can be different from those used for the vocal
messages.
