User Manual
GSM LT-1
10
complete the test transmission by calling in turn each of the preprogrammed numbers. The
phone numbers to be notified should be programmed by means of functions 21 to 24.
The first test transmission is carried out approx. 30 seconds after completion of the module
programming; the second one: after the programmed test transmission period, or randomly
(after a period not exceeding 20 hrs, unless duration of the programmed transmission period
is shorter). Subsequent transmissions are made in accordance with the programmed
parameter. Use function 19 or 25 for programming the duration of intervals between the test
transmissions.
When programming the test transmission data, remember to set the „test transmission
priority” (function 20), as appropriate.
Checking the current module status is also possible (function 99). You should just dial the
industrial cellular telephone number and hang up after a few call signals. A moment later the
module will answer with a CLIP (one-time, not requiring acknowledgement).
9.1 T
EST TRANSMISSION WITH ACKNOWLEDGEMENT
For each of the 4 telephone numbers programmed to be CLIP notified (functions 21–24), you
can select a separate option of sending SMS if there is no acknowledgement of receiving the
CLIP information (functions 36–39). The transmission acknowledgement consists in the
telephone user rejecting or receiving the connection set up by the GSM LT-1 module.
The acknowledgement can only take place within 10 to 20 seconds of the connection set-up.
In addition, the number of attempts (1–15) to make the transmission (functions 32 to 35) can
be programmed individually for each telephone number. Having detected the
acknowledgement of CLIP transmission, the module will finish dialing the given telephone
number. The module will call in turn each of the programmed numbers, starting from the
telephone no. 1. If the module fails to detect such an acknowledgement after making a preset
number of attempts, then it will send an SMS to the given telephone number, provided that
the messaging mode with acknowledgement and SMS send is selected. The message
contents can be standard - „CLIP failed” or programmed. The function 40 makes it possible to
delete the message contents or to enter a default text, while using the computer and
DLOAD10 program you can type in any text.
9.2 T
EST TRANSMISSION WITHOUT ACKNOWLEDGEMENT
In the „without acknowledgement” transmission mode, the module will dial the given
telephone number once (provided the number is not busy), irrespective of the programmed
number of test transmission attempts (functions 32–35).
Notes:
•
If the cellular phone of the message addressee is OFF or outside the network range, and
the voice mail service is inactive, then an automatic message on the existing situation is
generated in the receiver and no busy signal is sent back. In such a case, the messaging
is considered by the module as completed, while the user loses information on completion
thereof.
•
If the voice mail service is active, the user, after getting access to the network, may be
notified, depending on the operator (e.g. by means of an SMS) of the telephone
connection with the module number, without leaving any voice message.
9.3 SMS
CONTROL
The telephone numbers to be notified and the test transmission period can be remotely
changed by sending SMS messages to the module. Such messages must contain the proper
password and the programmable parameter (functions 27–31). The module can inform the
user that a change has been made, by sending a return SMS to the telephone number
